Merge release_0.1.0 to master

Add support for windows

18 files changed, 857 insertions, 272 deletions

diff --git a/backend/ninja/Ninja.cpp b/backend/ninja/Ninja.cpp
index d9b4eed..49bda4f 100644
--- a/backend/ninja/Ninja.cpp
+++ b/backend/ninja/Ninja.cpp
@@ -8,6 +8,12 @@
 using namespace std;
 using namespace sibs;
 
+#if OS_FAMILY == OS_FAMILY_POSIX
+#define nprintf printf
+#else
+#define nprintf wprintf
+#endif
+
 namespace backend
 {
     string join(const vector<string> &list, const char *joinStr)
@@ -38,7 +44,7 @@ namespace backend
 
         return result;
     }
-    
+
     bool endsWith(const string &str, const string &endWithStr)
     {
         if(endWithStr.size() > str.size())
@@ -46,7 +52,7 @@ namespace backend
         else
             return strncmp(&str[str.size() - endWithStr.size()], &endWithStr[0], endWithStr.size()) == 0;
     }
-    
+
     Ninja::LibraryType getNinjaLibraryType(PackageType packageType)
     {
         switch(packageType)
@@ -61,6 +67,78 @@ namespace backend
         }
     }
 
+    string getIncludeOptionFlag(Compiler compiler, const string &filepath)
+    {
+        string result;
+        switch (compiler)
+        {
+            case Compiler::GCC:
+            {
+                result = "'-I";
+                result += filepath;
+                result += "'";
+                break;
+            }
+            case Compiler::MSVC:
+            {
+                result = "/I \"";
+                result += filepath;
+                result += "\"";
+                break;
+            }
+        }
+        return result;
+    }
+
+    string getCompileWithoutLinkingFlag(Compiler compiler)
+    {
+        string result;
+        switch (compiler)
+        {
+            case Compiler::GCC:
+            {
+                result = "-c";
+                break;
+            }
+            case Compiler::MSVC:
+            {
+                result = "/c";
+                break;
+            }
+        }
+        return result;
+    }
+
+    string getObjectFileNameFlag(Compiler compiler, const string &objectFileName)
+    {
+        string result;
+        switch (compiler)
+        {
+            case Compiler::GCC:
+            {
+                result = "-o ";
+                result += objectFileName;
+                break;
+            }
+            case Compiler::MSVC:
+            {
+                result = "/Fo";
+                result += objectFileName;
+                break;
+            }
+        }
+        return result;
+    }
+
+    const char* getObjectFileExtension(Compiler compiler)
+    {
+        switch (compiler)
+        {
+            case Compiler::GCC:     return ".o";
+            case Compiler::MSVC:    return ".obj";
+        }
+    }
+
     Ninja::Ninja()
     {
 
@@ -127,6 +205,7 @@ namespace backend
         return false;
     }
 
+#if OS_FAMILY == OS_FAMILY_POSIX
     Result<bool> validatePkgConfigPackageVersionExists(const Dependency &dependency)
     {
         Result<bool> dependencyValidationResult = PkgConfig::validatePackageExists(dependency.name);
@@ -139,7 +218,7 @@ namespace backend
 
         return Result<bool>::Ok(true);
     }
-
+#endif
     // TODO: First check if pkg-config is installed. If it's not, only check dependencies that exists in the dependencies sub directory.
     // If pkg-config is installed and dependency is not installed, check in dependencies sub directory.
     Result<bool> Ninja::getLinkerFlags(const SibsConfig &config, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallback) const
@@ -147,14 +226,18 @@ namespace backend
         const vector<Dependency> &dependencies = config.getDependencies();
         if(dependencies.empty()) return Result<bool>::Ok(true);
 
-        string globalLibDir = getHomeDir();
-        globalLibDir += "/.sibs/lib";
+        Result<FileString> globalLibDirResult = getHomeDir();
+        if (!globalLibDirResult)
+            return Result<bool>::Err(globalLibDirResult);
+        FileString globalLibDir = globalLibDirResult.unwrap();
+        globalLibDir += TINYDIR_STRING("/.sibs/lib");
         Result<bool> createGlobalLibDirResult = createDirectoryRecursive(globalLibDir.c_str());
         if(createGlobalLibDirResult.isErr())
             return createGlobalLibDirResult;
 
-        vector<Dependency> pkgConfigDependencies;
         vector<Dependency> globalLibDependencies;
+#if OS_FAMILY == OS_FAMILY_POSIX
+        vector<Dependency> pkgConfigDependencies;
         for(const Dependency &dependency : dependencies)
         {
             Result<bool> pkgConfigDependencyValidation = validatePkgConfigPackageVersionExists(dependency);
@@ -169,11 +252,11 @@ namespace backend
         }
 
         Result<string> pkgConfigLinkerFlagsResult = PkgConfig::getDynamicLibsLinkerFlags(pkgConfigDependencies);
-        if(pkgConfigLinkerFlagsResult.isErr())
+        if (pkgConfigLinkerFlagsResult.isErr())
         {
             printf("%s, using global lib...\n", pkgConfigLinkerFlagsResult.getErrMsg().c_str());
             globalLibDependencies.reserve(globalLibDependencies.size() + pkgConfigDependencies.size());
-            for(const Dependency &pkgConfigDependency : pkgConfigDependencies)
+            for (const Dependency &pkgConfigDependency : pkgConfigDependencies)
             {
                 globalLibDependencies.push_back(pkgConfigDependency);
             }
@@ -181,9 +264,15 @@ namespace backend
         }
         else
         {
-            if(!pkgConfigLinkerFlagsResult.unwrap().empty())
+            if (!pkgConfigLinkerFlagsResult.unwrap().empty())
                 dynamicLinkerFlagCallback(pkgConfigLinkerFlagsResult.unwrap());
         }
+#else
+        for (const Dependency &dependency : dependencies)
+        {
+            globalLibDependencies.push_back(dependency);
+        }
+#endif
 
         for(const Dependency &globalLibDependency : globalLibDependencies)
         {
@@ -221,7 +310,7 @@ namespace backend
         return Result<bool>::Ok(true);
     }
 
-    Result<bool> Ninja::build(const SibsConfig &config, const char *savePath, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallback)
+    Result<bool> Ninja::build(const SibsConfig &config, const _tinydir_char_t *savePath, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallback)
     {
         // TODO: Do not quit here if no source files are provided. The source-less project could have dependencies
         if(sourceFiles.empty())
@@ -230,29 +319,35 @@ namespace backend
         Result<bool> createBuildDirResult = createDirectoryRecursive(savePath);
         if(createBuildDirResult.isErr())
             return createBuildDirResult;
-        
+
         LibraryType libraryType = getNinjaLibraryType(config.getPackageType());
 
-        string ninjaBuildFilePath = savePath;
-        ninjaBuildFilePath += "/build.ninja";
+        string savePathUtf8 = toUtf8(savePath);
+
+        FileString ninjaBuildFilePath = savePath;
+        ninjaBuildFilePath += TINYDIR_STRING("/build.ninja");
 
         string result;
         result.reserve(16384);
 
-        string globalIncDir = getHomeDir();
-        globalIncDir += "/.sibs/lib";
+        Result<FileString> globalIncDirResult = getHomeDir();
+        if (!globalIncDirResult)
+            return Result<bool>::Err(globalIncDirResult);
 
-        result += "globalIncDir = '-I";
-        result += globalIncDir;
-        result += "'";
+        FileString globalIncDir = globalIncDirResult.unwrap();
+        globalIncDir += TINYDIR_STRING("/.sibs/lib");
+
+        result += "globalIncDir = ";
+        result += getIncludeOptionFlag(config.getCompiler(), toUtf8(globalIncDir));
         for(const auto &includeDir : config.getIncludeDirs())
         {
-            result += " '-I../../";
-            result += includeDir;
-            result += "'";
+            string includeDirRelative = "../../";
+            includeDirRelative += includeDir;
+            result += " ";
+            result += getIncludeOptionFlag(config.getCompiler(), includeDirRelative);
         }
         result += "\n\n";
-        
+
         string defines;
         for(const auto &definePair : config.getDefines())
         {
@@ -262,25 +357,54 @@ namespace backend
             defines += definePair.second;
             defines += "'";
         }
-        
+
         if(!defines.empty())
             printf("Custom define: %s\n", defines.c_str());
 
+        string compilerName;
+        switch (config.getCompiler())
+        {
+            case Compiler::GCC:
+                compilerName = "ccache c++";
+                break;
+            case Compiler::MSVC:
+                compilerName = "cl.exe";
+                break;
+        }
+
         string buildJob;
         switch(libraryType)
         {
             case LibraryType::EXECUTABLE:
             {
-                result += "rule cpp_COMPILER\n";
-                result += "  command = ccache c++ $ARGS -c $in -o $out\n\n";
+                switch (config.getCompiler())
+                {
+                    case Compiler::GCC:
+                    {
+                        result += "rule cpp_COMPILER\n";
+                        result += "  command = ccache c++ $ARGS -c $in -o $out\n\n";
+
+                        result += "rule cpp_BUILD_EXEC\n";
+                        result += "  command = ccache c++ $ARGS -o $out $in $LINK_ARGS $aliasing\n\n";
+                        break;
+                    }
+                    case Compiler::MSVC:
+                    {
+                        result += "rule cpp_COMPILER\n";
+                        result += "  command = cl.exe $ARGS /c $in /Fo$out\n\n";
+
+                        result += "rule cpp_BUILD_EXEC\n";
+                        result += "  command = cl.exe $ARGS $in /Fe$out $LINK_ARGS\n\n";
+                        break;
+                    }
+                }
 
-                result += "rule cpp_BUILD_EXEC\n";
-                result += "  command = ccache c++ $ARGS -o $out $in $LINK_ARGS $aliasing\n\n";
                 buildJob = "cpp_BUILD_EXEC";
                 break;
             }
             case LibraryType::STATIC:
             {
+                // TODO: Write equivalent code for msvc
                 result += "rule cpp_COMPILER\n";
                 result += "  command = ccache c++ $ARGS -c -fPIC $in -o $out\n\n";
 
@@ -294,12 +418,32 @@ namespace backend
             }
             case LibraryType::DYNAMIC:
             {
-                result += "rule cpp_COMPILER\n";
-                result += "  command = ccache c++ $ARGS -c -fPIC $in -o $out\n\n";
+                switch (config.getCompiler())
+                {
+                    case Compiler::GCC:
+                    {
+                        result += "rule cpp_COMPILER\n";
+                        result += "  command = ccache c++ $ARGS -c -fPIC $in -o $out\n\n";
+
+                        // --whole-archive
+                        result += "rule cpp_BUILD_DYNAMIC\n";
+                        result += "  command = ccache c++ $in -shared -o $out $LINK_ARGS $aliasing\n\n";
+                        break;
+                    }
+                    case Compiler::MSVC:
+                    {
+                        result += "rule cpp_COMPILER\n";
+                        result += "  command = cl.exe $ARGS /c $in /Fo$out\n\n";
+
+                        //result += "rule cpp_BUILD_DYNAMIC\n";
+                        //result += "  command = cl.exe /LD $in /Fe$out $LINK_ARGS\n\n";
+
+                        result += "rule cpp_BUILD_DYNAMIC\n";
+                        result += "  command = lib.exe /OUT:$out $in\n\n";
+                        break;
+                    }
+                }
 
-                // --whole-archive
-                result += "rule cpp_BUILD_DYNAMIC\n";
-                result += "  command = ccache c++ $in -shared -o $out $LINK_ARGS $aliasing\n\n";
                 buildJob = "cpp_BUILD_DYNAMIC";
                 break;
             }
@@ -328,21 +472,28 @@ namespace backend
                 sourceFileLanguage = "c";
             //string sourceFileEncoded = sourceFile;
             //replace(sourceFileEncoded, '/', '@');
-            string objectName = config.getPackageName() + "@exe/" + sourceFile + ".o";
+            string objectName = config.getPackageName() + "@exe/" + sourceFile;
+            objectName += getObjectFileExtension(config.getCompiler());
             result += "build ";
             result += objectName;
             result += ": cpp_COMPILER ../../";
             result += sourceFile;
             result += "\n";
-            result += "  ARGS = $globalIncDir '-I" + config.getPackageName() + "@exe' '-I..' ";
+            result += "  ARGS = $globalIncDir ";
             if(!defines.empty())
                 result += defines;
-            result += " '-fdiagnostics-color=always' '-pipe' '-D_FILE_OFFSET_BITS=64' '-Wall' '-Winvalid-pch' '-Wnon-virtual-dtor' " + optimizationFlags + " '-g'\n\n";
+            if(config.getCompiler() != Compiler::MSVC)
+                result += " '-I" + config.getPackageName() + "@exe' '-I..' '-fdiagnostics-color=always' '-pipe' '-D_FILE_OFFSET_BITS=64' '-Wall' '-Winvalid-pch' '-Wnon-virtual-dtor' " + optimizationFlags + " '-g'";
+            result += "\n\n";
             objectNames.emplace_back(objectName);
         }
 
+#if OS_TYPE == OS_TYPE_LINUX
         // TODO: Allow configuring default linking flags. Maybe have `package.useThreads = false` to disable this flag
         string allLinkerFlags = "-pthread";
+#else
+        string allLinkerFlags = "";
+#endif
 
         // TODO: Somehow check loading order, because it has to be correct to work.. Or does it for dynamic libraries?
         // Anyways it's required for static libraries (especially on Windows)
@@ -374,7 +525,7 @@ namespace backend
 
         string projectGeneratedBinary = allLinkerFlags;
         projectGeneratedBinary += " '";
-        projectGeneratedBinary += savePath;
+        projectGeneratedBinary += savePathUtf8;
         projectGeneratedBinary += "/";
         switch(libraryType)
         {
@@ -385,7 +536,20 @@ namespace backend
                 result += ": " + buildJob + " ";
                 result += join(objectNames, " ");
                 result += "\n";
-                result += "  LINK_ARGS = '-Wl,--no-undefined,--as-needed' ";
+                switch (config.getCompiler())
+                {
+                    case Compiler::GCC:
+                    {
+                        result += "  LINK_ARGS = '-Wl,--no-undefined,--as-needed' ";
+                        break;
+                    }
+                    case Compiler::MSVC:
+                    {
+                        result += "  LINK_ARGS = ";
+                        break;
+                    }
+                }
+
                 if(!allLinkerFlags.empty())
                 {
                     result += allLinkerFlags;
@@ -401,24 +565,56 @@ namespace backend
                 result += ": " + buildJob + " ";
                 result += join(objectNames, " ");
                 result += "\n\n";
-                projectGeneratedBinary += config.getPackageName() + ".a";
+
+                switch (config.getCompiler())
+                {
+                    case Compiler::GCC:
+                    {
+                        projectGeneratedBinary += config.getPackageName() + ".a";
+                        break;
+                    }
+                    case Compiler::MSVC:
+                    {
+                        projectGeneratedBinary += config.getPackageName() + ".lib";
+                        break;
+                    }
+                }
                 break;
             }
             case LibraryType::DYNAMIC:
             {
-                result += "build lib";
-                result += config.getPackageName();
-                result += ".so: " + buildJob + " ";
-                result += join(objectNames, " ");
-                result += "\n";
-                result += "  LINK_ARGS = '-Wl,--no-undefined,--as-needed' ";
+                switch (config.getCompiler())
+                {
+                    case Compiler::GCC:
+                    {
+                        result += "build lib";
+                        result += config.getPackageName();
+                        result += ".so: " + buildJob + " ";
+                        result += join(objectNames, " ");
+                        result += "\n";
+                        result += "  LINK_ARGS = '-Wl,--no-undefined,--as-needed' ";
+                        projectGeneratedBinary += "lib" + config.getPackageName() + ".so";
+                        break;
+                    }
+                    case Compiler::MSVC:
+                    {
+                        result += "build ";
+                        result += config.getPackageName();
+                        result += ".lib: " + buildJob + " ";
+                        result += join(objectNames, " ");
+                        result += "\n";
+                        result += "  LINK_ARGS = ";
+                        projectGeneratedBinary += config.getPackageName() + ".lib";
+                        break;
+                    }
+                }
+
                 if(!allLinkerFlags.empty())
                 {
                     result += allLinkerFlags;
                     //result += " '-Wl,--no-whole-archive'";
                 }
                 result += "\n\n";
-                projectGeneratedBinary += "lib" + config.getPackageName() + ".so";
                 break;
             }
             default:
@@ -431,7 +627,7 @@ namespace backend
         if(fileOverwriteResult.isErr())
             return fileOverwriteResult;
 
-        printf("Created ninja build file: %s\n", ninjaBuildFilePath.c_str());
+        nprintf(TINYDIR_STRING("Created ninja build file: %s\n"), ninjaBuildFilePath.c_str());
 
         Result<bool> buildResult = build(savePath);
         if(!buildResult)
@@ -444,13 +640,13 @@ namespace backend
         return Result<bool>::Ok(true);
     }
 
-    const char *sourceFileExtensions[] = { "c", "cc", "cpp", "cxx" };
+    const _tinydir_char_t *sourceFileExtensions[] = { TINYDIR_STRING("c"), TINYDIR_STRING("cc"), TINYDIR_STRING("cpp"), TINYDIR_STRING("cxx") };
     bool isSourceFile(tinydir_file *file)
     {
         if(!file->is_reg)
             return false;
 
-        for(const char *sourceFileExtension : sourceFileExtensions)
+        for(const _tinydir_char_t *sourceFileExtension : sourceFileExtensions)
         {
             if(_tinydir_strcmp(sourceFileExtension, file->extension) == 0)
                 return true;
@@ -480,11 +676,17 @@ namespace backend
 
         for(const string &testSourceDir : testSourceDirs)
         {
-            string projectConfFilePath = testSourceDir;
-            projectConfFilePath += "/project.conf";
+#if OS_FAMILY == OS_FAMILY_POSIX
+            FileString testSourceDirNative = testSourceDir;
+            FileString projectConfFilePath = testSourceDir;
+#else
+            FileString testSourceDirNative = utf8To16(testSourceDir);
+            FileString projectConfFilePath = testSourceDirNative;
+#endif
+            projectConfFilePath += TINYDIR_STRING("/project.conf");
 
             FileType projectConfFileType = getFileType(projectConfFilePath.c_str());
-            SibsTestConfig sibsTestConfig(testSourceDir);
+            SibsTestConfig sibsTestConfig(config.getCompiler(), testSourceDirNative);
             if(projectConfFileType == FileType::REGULAR)
             {
                 Result<bool> result = Config::readFromFile(projectConfFilePath.c_str(), sibsTestConfig);
@@ -494,11 +696,12 @@ namespace backend
 
             backend::Ninja ninja;
             ninja.addDependency(projectGeneratedBinary);
-            walkDirFilesRecursive(testSourceDir.c_str(), [&ninja, &sibsTestConfig](tinydir_file *file)
+            walkDirFilesRecursive(testSourceDirNative.c_str(), [&ninja, &sibsTestConfig](tinydir_file *file)
             {
                 if (isSourceFile(file))
                 {
-                    ninja.addSourceFile(file->path + sibsTestConfig.getProjectPath().size() + 1);
+                    string filePathUtf8 = toUtf8(file->path + sibsTestConfig.getProjectPath().size() + 1);
+                    ninja.addSourceFile(filePathUtf8.c_str());
                 }
                 else
                 {
@@ -508,7 +711,7 @@ namespace backend
 
             if(!ninja.getSourceFiles().empty())
             {
-                string debugBuildPath = testSourceDir + "/sibs-build/debug";
+                FileString debugBuildPath = testSourceDirNative + TINYDIR_STRING("/sibs-build/debug");
                 Result<bool> buildFileResult = ninja.build(sibsTestConfig, debugBuildPath.c_str());
                 if (!buildFileResult)
                     return buildFileResult;
@@ -522,11 +725,11 @@ namespace backend
         return Result<bool>::Ok(true);
     }
 
-    Result<bool> Ninja::build(const char *buildFilePath)
+    Result<bool> Ninja::build(const _tinydir_char_t *buildFilePath)
     {
-        string command = "ninja -C '";
+        FileString command = TINYDIR_STRING("ninja -C \"");
         command += buildFilePath;
-        command += "'";
+        command += TINYDIR_STRING("\"");
         Result<ExecResult> execResult = exec(command.c_str(), true);
         if(execResult.isOk())
         {
diff --git a/backend/ninja/Ninja.hpp b/backend/ninja/Ninja.hpp
index 17649aa..36a57ff 100644
--- a/backend/ninja/Ninja.hpp
+++ b/backend/ninja/Ninja.hpp
@@ -28,14 +28,14 @@ namespace backend
         void addTestSourceDir(const char *dir);
         void addDependency(const std::string &binaryFile);
         const std::vector<std::string>& getSourceFiles() const;
-        sibs::Result<bool> build(const sibs::SibsConfig &config, const char *savePath, sibs::LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc = nullptr, sibs::LinkerFlagCallbackFunc dynamicLinkerFlagCallback = nullptr);
+        sibs::Result<bool> build(const sibs::SibsConfig &config, const _tinydir_char_t *savePath, sibs::LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc = nullptr, sibs::LinkerFlagCallbackFunc dynamicLinkerFlagCallback = nullptr);
     private:
         sibs::Result<bool> buildTests(const std::string &projectGeneratedBinary, const sibs::SibsConfig &config, const char *savePath);
         bool containsSourceFile(const std::string &filepath) const;
         bool containsTestSourceDir(const std::string &dir) const;
         bool containsDependency(const std::string &dependency) const;
         sibs::Result<bool> getLinkerFlags(const sibs::SibsConfig &config, sibs::LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, sibs::LinkerFlagCallbackFunc dynamicLinkerFlagCallback) const;
-        sibs::Result<bool> build(const char *buildFilePath);
+        sibs::Result<bool> build(const _tinydir_char_t *buildFilePath);
     private:
         std::vector<std::string> sourceFiles;
         std::vector<std::string> testSourceDirs;
diff --git a/include/Archive.hpp b/include/Archive.hpp
index 2545f77..10811ab 100644
--- a/include/Archive.hpp
+++ b/include/Archive.hpp
@@ -2,6 +2,7 @@
 #define SIBS_ZLIB_HPP
 
 #include "Result.hpp"
+#include "FileUtil.hpp"
 
 namespace sibs
 {
@@ -9,7 +10,7 @@ namespace sibs
     {
     public:
         // Note: renames root directory in archive to @destination
-        static Result<bool> extract(const char *source, const char *destination);
+        static Result<bool> extract(const _tinydir_char_t *source, const _tinydir_char_t *destination);
     };
 }
 
diff --git a/include/Conf.hpp b/include/Conf.hpp
index 5e3ed87..d147fca 100644
--- a/include/Conf.hpp
+++ b/include/Conf.hpp
@@ -1,6 +1,7 @@
 #ifndef SIBS_CONF_HPP
 #define SIBS_CONF_HPP
 
+#include "FileUtil.hpp"
 #include "Result.hpp"
 #include "StringView.hpp"
 #include "utils.hpp"
@@ -82,7 +83,7 @@ namespace sibs
     class Config
     {
     public:
-        static Result<bool> readFromFile(const char *filepath, const ConfigCallback &callback);
+        static Result<bool> readFromFile(const _tinydir_char_t *filepath, const ConfigCallback &callback);
     };
 
     enum OptimizationLevel
@@ -92,14 +93,25 @@ namespace sibs
         OPT_LEV_RELEASE
     };
 
+    enum class Compiler
+    {
+        GCC,
+        MSVC
+    };
+
     const char* asString(OptimizationLevel optLevel);
 
     class SibsConfig : public ConfigCallback
     {
     public:
-        SibsConfig(const std::string &_projectPath, OptimizationLevel _optimizationLevel = OPT_LEV_DEBUG) : projectPath(_projectPath), packageType((PackageType)-1), optimizationLevel(_optimizationLevel), finishedProcessing(false) {}
+        SibsConfig(Compiler _compiler, const FileString &_projectPath, OptimizationLevel _optimizationLevel = OPT_LEV_DEBUG) : compiler(_compiler), projectPath(_projectPath), packageType((PackageType)-1), optimizationLevel(_optimizationLevel), finishedProcessing(false) {}
         virtual ~SibsConfig(){}
 
+        Compiler getCompiler() const
+        {
+            return compiler;
+        }
+
         virtual const std::string& getPackageName() const
         {
             assert(finishedProcessing);
@@ -112,7 +124,7 @@ namespace sibs
             return packageType;
         }
 
-        virtual const std::string& getTestPath() const
+        virtual const FileString& getTestPath() const
         {
             return testPath;
         }
@@ -122,7 +134,7 @@ namespace sibs
             return dependencies;
         }
 
-        virtual const std::string& getProjectPath() const
+        virtual const FileString& getProjectPath() const
         {
             return projectPath;
         }
@@ -151,9 +163,10 @@ namespace sibs
         virtual void finished() override;
     protected:
         StringView currentObject;
-        std::string projectPath;
+        Compiler compiler;
+        FileString projectPath;
         std::string packageName;
-        std::string testPath;
+        FileString testPath;
         PackageType packageType;
         std::vector<Dependency> dependencies;
         std::vector<std::string> includeDirs;
@@ -165,7 +178,7 @@ namespace sibs
     class SibsTestConfig : public SibsConfig
     {
     public:
-        SibsTestConfig(const std::string &_projectPath) : SibsConfig(_projectPath)
+        SibsTestConfig(Compiler _compiler, const FileString &_projectPath) : SibsConfig(_compiler, _projectPath)
         {
             packageName = "test";
         }
diff --git a/include/Exec.hpp b/include/Exec.hpp
index 42b6905..9996073 100644
--- a/include/Exec.hpp
+++ b/include/Exec.hpp
@@ -2,6 +2,7 @@
 #define SIBS_EXEC_HPP
 
 #include "Result.hpp"
+#include "../include/FileUtil.hpp"
 #include <string>
 
 namespace sibs
@@ -12,7 +13,7 @@ namespace sibs
         int exitCode;
     };
 
-    Result<ExecResult> exec(const char *cmd, bool print = false);
+    Result<ExecResult> exec(const _tinydir_char_t *cmd, bool print = false);
 }
 
 #endif //SIBS_EXEC_HPP
diff --git a/include/FileUtil.hpp b/include/FileUtil.hpp
index 5d1594a..89eaa84 100644
--- a/include/FileUtil.hpp
+++ b/include/FileUtil.hpp
@@ -1,13 +1,37 @@
 #ifndef SIBS_FILEUTIL_HPP
 #define SIBS_FILEUTIL_HPP
 
+#ifndef UNICODE
+#define UNICODE
+#endif
+
+#ifndef _UNICODE
+#define _UNICODE
+#endif
+
+#include "env.hpp"
 #include "../external/tinydir.h"
+#include "../external/utf8/checked.h"
 #include "Result.hpp"
 #include "StringView.hpp"
 #include <functional>
 
 namespace sibs
 {
+	using FileString = std::basic_string<_tinydir_char_t, std::char_traits<_tinydir_char_t>, std::allocator<_tinydir_char_t>>;
+
+#if OS_FAMILY == OS_FAMILY_POSIX
+#define toUtf8(input) input
+    FileString toFileString(const std::string &utf8Str);
+#else
+    std::string toUtf8(const sibs::FileString &input);
+    std::string toUtf8(const TCHAR *input);
+    FileString utf8To16(const StringView &utf8Str);
+    FileString utf8To16(const std::string &utf8Str);
+    FileString toFileString(const std::string &utf8Str);
+    FileString getLastErrorAsString();
+#endif
+
     using FileWalkCallbackFunc = std::function<void(tinydir_file*)>;
 
     enum class FileType
@@ -17,17 +41,17 @@ namespace sibs
         DIRECTORY
     };
 
-    FileType getFileType(const char *path);
-    void walkDir(const char *directory, FileWalkCallbackFunc callbackFunc);
-    void walkDirFiles(const char *directory, FileWalkCallbackFunc callbackFunc);
-    void walkDirFilesRecursive(const char *directory, FileWalkCallbackFunc callbackFunc);
-    Result<StringView> getFileContent(const char *filepath);
-    Result<bool> fileOverwrite(const char *filepath, StringView data);
-    const char* getHomeDir();
-    Result<std::string> getCwd();
+    FileType getFileType(const _tinydir_char_t *path);
+    void walkDir(const _tinydir_char_t *directory, FileWalkCallbackFunc callbackFunc);
+    void walkDirFiles(const _tinydir_char_t *directory, FileWalkCallbackFunc callbackFunc);
+    void walkDirFilesRecursive(const _tinydir_char_t *directory, FileWalkCallbackFunc callbackFunc);
+    Result<StringView> getFileContent(const _tinydir_char_t *filepath);
+    Result<bool> fileOverwrite(const _tinydir_char_t *filepath, StringView data);
+    Result<FileString> getHomeDir();
+    Result<FileString> getCwd();
     // Note: Will not delete created directories if this operation fails for some reason
-    Result<bool> createDirectoryRecursive(const char *path);
-    Result<std::string> getRealPath(const char *path);
+    Result<bool> createDirectoryRecursive(const _tinydir_char_t *path);
+    Result<FileString> getRealPath(const _tinydir_char_t *path);
 }
 
 #endif //SIBS_FILEUTIL_HPP
diff --git a/include/GlobalLib.hpp b/include/GlobalLib.hpp
index c67027e..2f4b938 100644
--- a/include/GlobalLib.hpp
+++ b/include/GlobalLib.hpp
@@ -17,8 +17,8 @@ namespace sibs
             DEPENDENCY_VERSION_NO_MATCH = 20
         };
 
-        static Result<bool> validatePackageExists(const std::string &globalLibRootDir, const std::string &name);
-        static Result<std::string> getLibsLinkerFlags(const SibsConfig &parentConfig, const std::string &globalLibRootDir, const std::string &name, const std::string &version, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc);
+        static Result<bool> validatePackageExists(const FileString &globalLibRootDir, const std::string &name);
+        static Result<std::string> getLibsLinkerFlags(const SibsConfig &parentConfig, const FileString &globalLibRootDir, const std::string &name, const std::string &version, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc);
         static Result<bool> downloadDependency(const Dependency &dependency);
     };
 }
diff --git a/include/PkgConfig.hpp b/include/PkgConfig.hpp
index 2af4ac9..da78b91 100644
--- a/include/PkgConfig.hpp
+++ b/include/PkgConfig.hpp
@@ -1,6 +1,8 @@
 #ifndef SIBS_PKGCONFIG_HPP
 #define SIBS_PKGCONFIG_HPP
 
+#include "env.hpp"
+#if OS_FAMILY == OS_FAMILY_POSIX
 #include "Result.hpp"
 #include "Dependency.hpp"
 #include <string>
@@ -16,5 +18,6 @@ namespace sibs
         static Result<std::string> getDynamicLibsLinkerFlags(const std::vector<Dependency> &libs);
     };
 }
+#endif // OS_FAMILY_POSIX
 
-#endif //SIBS_PKGCONFIG_HPP
+#endif // SIBS_PKGCONFIG_HPP
diff --git a/include/curl.hpp b/include/curl.hpp
index 7c0ddbe..16b3e52 100644
--- a/include/curl.hpp
+++ b/include/curl.hpp
@@ -2,6 +2,7 @@
 #define SIBS_CURL_HPP
 
 #include "Result.hpp"
+#include "FileUtil.hpp"
 #include <string>
 
 namespace sibs
@@ -17,7 +18,7 @@ namespace sibs
     class curl
     {
     public:
-        static sibs::Result<bool> downloadFile(const char *url, const char *filepath);
+        static sibs::Result<bool> downloadFile(const char *url, const _tinydir_char_t *filepath);
         static HttpResult get(const char *url);
     };
 }
diff --git a/include/env.hpp b/include/env.hpp
index f5b1213..51ee2bd 100644
--- a/include/env.hpp
+++ b/include/env.hpp
@@ -4,6 +4,9 @@
 #define OS_FAMILY_WINDOWS 0
 #define OS_FAMILY_POSIX 1
 
+#define OS_TYPE_WINDOWS 0
+#define OS_TYPE_LINUX 1
+
 #if defined(_WIN32) || defined(_WIN64)
     #if defined(_WIN64)
         #define CISB_ENV_64BIT
@@ -11,12 +14,31 @@
         #define CISB_ENV_32BIT
     #endif
     #define OS_FAMILY OS_FAMILY_WINDOWS
+    #define OS_TYPE OS_TYPE_WINDOWS
+
+	#ifndef UNICODE
+	#define UNICODE
+	#endif
+
+	#ifndef _UNICODE
+	#define _UNICODE
+	#endif
+
+	#ifndef WIN32_LEAN_AND_MEAN
+	#define WIN32_LEAN_AND_MEAN
+	#endif
+
+	#include <Windows.h>
 #endif
 
 #if defined(__linux__) || defined(__unix__) || defined(__APPLE__) || defined(_POSIX_VERSION)
     #define OS_FAMILY OS_FAMILY_POSIX
 #endif
 
+#ifdef __linux__
+    #define OS_TYPE OS_TYPE_LINUX
+#endif
+
 #if defined(__GNUC__)
     #if defined(__x86_64__) || defined(__pc64__)
         #define CISB_ENV_64BIT
@@ -30,7 +52,11 @@
 #endif
 
 #if !defined(OS_FAMILY)
-    #error "System not support. Only Windows and Posix systems support"
+    #error "System not supported. Only Windows and Posix systems supported right now"
+#endif
+
+#if !defined(OS_TYPE)
+    #error "System not supported. Only Windows and linux systems supported right now"
 #endif
 
 #if !defined(DEBUG) && !defined(NDEBUG)
diff --git a/src/Archive.cpp b/src/Archive.cpp
index 08ab42b..506b020 100644
--- a/src/Archive.cpp
+++ b/src/Archive.cpp
@@ -6,6 +6,14 @@
 
 using namespace std;
 
+#if OS_FAMILY == OS_FAMILY_POSIX
+#define archive_read_open_filename_native archive_read_open_filename
+#define archive_entry_pathname_native archive_entry_pathname
+#else
+#define archive_read_open_filename_native archive_read_open_filename_w
+#define archive_entry_pathname_native archive_entry_pathname_w
+#endif
+
 class FileHandler
 {
     DISABLE_COPY(FileHandler)
@@ -53,7 +61,7 @@ namespace sibs
         }
     }
 
-    Result<bool> Archive::extract(const char *source, const char *destination)
+    Result<bool> Archive::extract(const _tinydir_char_t *source, const _tinydir_char_t *destination)
     {
         struct archive *a;
         struct archive *ext;
@@ -67,7 +75,7 @@ namespace sibs
         flags |= ARCHIVE_EXTRACT_ACL;
         flags |= ARCHIVE_EXTRACT_FFLAGS;
 
-        string rootName;
+        FileString rootName;
 
         a = archive_read_new();
         archive_read_support_format_all(a);
@@ -77,10 +85,10 @@ namespace sibs
         archive_write_disk_set_standard_lookup(ext);
 
 
-        if ((r = archive_read_open_filename(a, source, 10240)))
+        if ((r = archive_read_open_filename_native(a, source, 10240)))
         {
             string errMsg = "Failed to extract archive: ";
-            errMsg += source;
+            errMsg += toUtf8(source);
             return Result<bool>::Err(errMsg);
         }
 
@@ -92,7 +100,7 @@ namespace sibs
             else if (r < ARCHIVE_OK)
             {
                 string errMsg = "Failed to extract archive: ";
-                errMsg += source;
+                errMsg += toUtf8(source);
                 errMsg += "; reason: ";
                 errMsg += archive_error_string(a);
                 return Result<bool>::Err(errMsg);
@@ -100,25 +108,27 @@ namespace sibs
             else if (r < ARCHIVE_WARN)
             {
                 string errMsg = "Failed to extract archive: ";
-                errMsg += source;
+                errMsg += toUtf8(source);
                 errMsg += "; reason: ";
                 errMsg += archive_error_string(a);
                 return Result<bool>::Err(errMsg);
             }
 
-            const char* currentFile = archive_entry_pathname(entry);
+            const _tinydir_char_t* currentFile = archive_entry_pathname_native(entry);
             if(rootName.empty())
                 rootName = currentFile;
 
-            std::string fullOutputPath = destination;
+            FileString fullOutputPath = destination;
             fullOutputPath += (currentFile + (rootName.empty() ? 0 : rootName.size() - 1));
-            archive_entry_set_pathname(entry, fullOutputPath.c_str());
+            // TODO: Verify if this really works. Why doesn't libarchive have wide string version of archive_entry_set_pathname?
+            string fullOutputPathUtf8 = toUtf8(fullOutputPath);
+            archive_entry_set_pathname(entry, fullOutputPathUtf8.c_str());
 
             r = archive_write_header(ext, entry);
             if (r < ARCHIVE_OK)
             {
                 string errMsg = "Failed to extract archive: ";
-                errMsg += source;
+                errMsg += toUtf8(source);
                 errMsg += "; reason: ";
                 errMsg += archive_error_string(ext);
                 return Result<bool>::Err(errMsg);
@@ -128,7 +138,7 @@ namespace sibs
                 if (r < ARCHIVE_OK)
                 {
                     string errMsg = "Failed to extract archive: ";
-                    errMsg += source;
+                    errMsg += toUtf8(source);
                     errMsg += "; reason: ";
                     errMsg += archive_error_string(ext);
                     return Result<bool>::Err(errMsg);
@@ -136,7 +146,7 @@ namespace sibs
                 else if (r < ARCHIVE_WARN)
                 {
                     string errMsg = "Failed to extract archive: ";
-                    errMsg += source;
+                    errMsg += toUtf8(source);
                     errMsg += "; reason: ";
                     errMsg += archive_error_string(ext);
                     return Result<bool>::Err(errMsg);
@@ -147,7 +157,7 @@ namespace sibs
             if (r < ARCHIVE_OK)
             {
                 string errMsg = "Failed to extract archive: ";
-                errMsg += source;
+                errMsg += toUtf8(source);
                 errMsg += "; reason: ";
                 errMsg += archive_error_string(ext);
                 return Result<bool>::Err(errMsg);
@@ -155,7 +165,7 @@ namespace sibs
             else if (r < ARCHIVE_WARN)
             {
                 string errMsg = "Failed to extract archive: ";
-                errMsg += source;
+                errMsg += toUtf8(source);
                 errMsg += "; reason: ";
                 errMsg += archive_error_string(ext);
                 return Result<bool>::Err(errMsg);
diff --git a/src/Conf.cpp b/src/Conf.cpp
index 6d5834e..5282bb5 100644
--- a/src/Conf.cpp
+++ b/src/Conf.cpp
@@ -1,5 +1,5 @@
 #include "../include/Conf.hpp"
-#include "../include/FileUtil.hpp"
+#include "../include/types.hpp"
 #include "../external/utf8/unchecked.h"
 
 using namespace std;
@@ -7,8 +7,6 @@ using u8string = utf8::unchecked::iterator<char*>;
 
 namespace sibs
 {
-    u32 min(u32 a, u32 b) { return a < b ? a : b; }
-
     class UnexpectedTokenException : public std::runtime_error
     {
     public:
@@ -316,7 +314,7 @@ namespace sibs
         bool objectDefined;
     };
 
-    Result<bool> Config::readFromFile(const char *filepath, const ConfigCallback &callback)
+    Result<bool> Config::readFromFile(const _tinydir_char_t *filepath, const ConfigCallback &callback)
     {
         Result<StringView> fileContentResult = getFileContent(filepath);
         if(fileContentResult.isErr())
@@ -430,9 +428,13 @@ namespace sibs
                 if (value.isSingle())
                 {
                     testPath = projectPath;
-                    testPath += "/";
-                    testPath += string(value.asSingle().data, value.asSingle().size);
-                    Result<string> testRealPathResult = getRealPath(testPath.c_str());
+                    testPath += TINYDIR_STRING("/");
+#if OS_FAMILY == OS_FAMILY_POSIX
+                    testPath += FileString(value.asSingle().data, value.asSingle().size);
+#else
+                    testPath += utf8To16(value.asSingle());
+#endif
+                    Result<FileString> testRealPathResult = getRealPath(testPath.c_str());
                     if(!testRealPathResult)
                     {
                         string errMsg = "Failed to resolve package.tests path: ";
diff --git a/src/Exec.cpp b/src/Exec.cpp
index 37ffef5..e0ae306 100644
--- a/src/Exec.cpp
+++ b/src/Exec.cpp
@@ -1,10 +1,12 @@
 #include "../include/Exec.hpp"
+#include "../include/env.hpp"
 
 using namespace std;
 
 namespace sibs
 {
-    Result<ExecResult> exec(const char *cmd, bool print)
+#if OS_FAMILY == OS_FAMILY_POSIX
+    Result<ExecResult> exec(const _tinydir_char_t *cmd, bool print)
     {
         char buffer[128];
         std::string result;
@@ -52,4 +54,49 @@ namespace sibs
             return Result<ExecResult>::Err(errMsg);
         }
     }
+#else
+    // TODO(Windows): Redirect stdout (and stderr) to string
+    Result<ExecResult> exec(const _tinydir_char_t *cmd, bool print)
+    {
+        char buffer[128];
+        std::string result;
+
+        STARTUPINFO startupInfo;
+        ZeroMemory(&startupInfo, sizeof(startupInfo));
+        startupInfo.cb = sizeof(startupInfo);
+
+        PROCESS_INFORMATION processInfo;
+        ZeroMemory(&processInfo, sizeof(processInfo));
+
+        DWORD exitCode;
+        
+        if (!CreateProcess(NULL, (LPWSTR)cmd, NULL, NULL, FALSE, 0, NULL, NULL, &startupInfo, &processInfo))
+        {
+            string errMsg = "exec unexpected error: ";
+            errMsg += toUtf8(getLastErrorAsString());
+            return Result<ExecResult>::Err(errMsg);
+        }
+
+        WaitForSingleObject(processInfo.hProcess, INFINITE);
+        GetExitCodeProcess(processInfo.hProcess, &exitCode);
+        CloseHandle(processInfo.hProcess);
+        CloseHandle(processInfo.hThread);
+
+        if (exitCode == 0)
+        {
+            ExecResult execResult;
+            execResult.execStdout = result;
+            execResult.exitCode = exitCode;
+            return Result<ExecResult>::Ok(execResult);
+        }
+        else
+        {
+            string errMsg = "Exited with non-zero exit code (";
+            errMsg += to_string(exitCode);
+            errMsg += "): ";
+            errMsg += toUtf8(getLastErrorAsString());
+            return Result<ExecResult>::Err(errMsg);
+        }
+    }
+#endif
 }
\ No newline at end of file
diff --git a/src/FileUtil.cpp b/src/FileUtil.cpp
index d075f2b..5cf8377 100644
--- a/src/FileUtil.cpp
+++ b/src/FileUtil.cpp
@@ -1,5 +1,4 @@
 #include "../include/FileUtil.hpp"
-#include "../include/env.hpp"
 #include <cstdio>
 
 #if OS_FAMILY == OS_FAMILY_POSIX
@@ -7,27 +6,92 @@
 #include <sys/types.h>
 #include <pwd.h>
 #include <fcntl.h>
+#else
+#include <UserEnv.h>
+// Copied from linux libc sys/stat.h:
+#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 #endif
 
 using namespace std;
 
 namespace sibs
 {
-    FileType getFileType(const char *path)
+#if OS_FAMILY == OS_FAMILY_POSIX
+#define toUtf8(input) input
+    FileString toFileString(const std::string &utf8Str)
     {
-        tinydir_file file;
-        if(tinydir_file_open(&file, path) == 0)
-        {
-            return file.is_dir ? FileType::DIRECTORY : FileType::REGULAR;
-        }
+        return utf8Str;
+    }
+#else
+    std::string toUtf8(const sibs::FileString &input)
+    {
+        std::string result;
+        utf8::utf16to8(input.data(), input.data() + input.size(), std::back_inserter(result));
+        return result;
+    }
+
+    std::string toUtf8(const TCHAR *input)
+    {
+        size_t inputSize = wcslen(input);
+        std::string result;
+        utf8::utf16to8(input, input + inputSize, std::back_inserter(result));
+        return result;
+    }
+
+    FileString utf8To16(const StringView &utf8Str)
+    {
+        FileString result;
+        utf8::utf8to16(utf8Str.data, utf8Str.data + utf8Str.size, std::back_inserter(result));
+        return result;
+    }
+
+    FileString utf8To16(const std::string &utf8Str)
+    {
+        FileString result;
+        utf8::utf8to16(utf8Str.data(), utf8Str.data() + utf8Str.size(), std::back_inserter(result));
+        return result;
+    }
+
+    FileString toFileString(const std::string &utf8Str)
+    {
+        return utf8To16(utf8Str);
+    }
+
+    FileString getLastErrorAsString()
+    {
+        DWORD errorMessageId = GetLastError();
+        if (errorMessageId == 0) return TINYDIR_STRING("");
+        LPWSTR messageBuffer = nullptr;
+        size_t size = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr, errorMessageId, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPWSTR)&messageBuffer, 0, nullptr);
+        FileString message(messageBuffer, size);
+        LocalFree(messageBuffer);
+        return message;
+    }
+#endif
+
+#if OS_FAMILY == OS_FAMILY_POSIX
+    FileType getFileType(const _tinydir_char_t *path)
+    {
+        struct stat64 fileStat;
+        if (stat64(path, &fileStat) == 0)
+            return S_ISREG(fileStat.st_mode) ? FileType::REGULAR : FileType::DIRECTORY;
         else
-        {
             return FileType::FILE_NOT_FOUND;
-        }
     }
+#else
+    FileType getFileType(const _tinydir_char_t *path)
+    {
+        struct _stat64i32 fileStat;
+        if (_wstat(path, &fileStat) == 0)
+            return S_ISREG(fileStat.st_mode) ? FileType::REGULAR : FileType::DIRECTORY;
+        else
+            return FileType::FILE_NOT_FOUND;
+    }
+#endif
 
     // TODO: Handle failure (directory doesn't exist, no permission etc)
-    void walkDir(const char *directory, FileWalkCallbackFunc callbackFunc)
+    void walkDir(const _tinydir_char_t *directory, FileWalkCallbackFunc callbackFunc)
     {
         tinydir_dir dir;
         tinydir_open(&dir, directory);
@@ -36,7 +100,7 @@ namespace sibs
         {
             tinydir_file file;
             tinydir_readfile(&dir, &file);
-            if(_tinydir_strcmp(file.name, ".") != 0 && _tinydir_strcmp(file.name, "..") != 0)
+            if(_tinydir_strcmp(file.name, TINYDIR_STRING(".")) != 0 && _tinydir_strcmp(file.name, TINYDIR_STRING("..")) != 0)
                 callbackFunc(&file);
             tinydir_next(&dir);
         }
@@ -45,7 +109,7 @@ namespace sibs
     }
 
     // TODO: Handle failure (directory doesn't exist, no permission etc)
-    void walkDirFiles(const char *directory, FileWalkCallbackFunc callbackFunc)
+    void walkDirFiles(const _tinydir_char_t *directory, FileWalkCallbackFunc callbackFunc)
     {
         tinydir_dir dir;
         tinydir_open(&dir, directory);
@@ -63,7 +127,7 @@ namespace sibs
     }
 
     // TODO: Handle failure (directory doesn't exist, no permission etc)
-    void walkDirFilesRecursive(const char *directory, FileWalkCallbackFunc callbackFunc)
+    void walkDirFilesRecursive(const _tinydir_char_t *directory, FileWalkCallbackFunc callbackFunc)
     {
         tinydir_dir dir;
         tinydir_open(&dir, directory);
@@ -74,7 +138,7 @@ namespace sibs
             tinydir_readfile(&dir, &file);
             if(file.is_reg)
                 callbackFunc(&file);
-            else if(_tinydir_strcmp(file.name, ".") != 0 && _tinydir_strcmp(file.name, "..") != 0)
+            else if(_tinydir_strcmp(file.name, TINYDIR_STRING(".")) != 0 && _tinydir_strcmp(file.name, TINYDIR_STRING("..")) != 0)
                 walkDirFilesRecursive(file.path, callbackFunc);
             tinydir_next(&dir);
         }
@@ -82,14 +146,18 @@ namespace sibs
         tinydir_close(&dir);
     }
 
-    Result<StringView> getFileContent(const char *filepath)
+    Result<StringView> getFileContent(const _tinydir_char_t *filepath)
     {
+#if OS_FAMILY == OS_FAMILY_POSIX
         FILE *file = fopen(filepath, "rb");
+#else
+        FILE *file = _wfopen(filepath, TINYDIR_STRING("rb"));
+#endif
         if(!file)
         {
             int error = errno;
             string errMsg = "Failed to open file: ";
-            errMsg += filepath;
+            errMsg += toUtf8(filepath);
             errMsg += "; reason: ";
             errMsg += strerror(error);
             return Result<StringView>::Err(errMsg);
@@ -104,7 +172,7 @@ namespace sibs
         if(!result)
         {
             std::string errMsg = "Failed to load file content from file: ";
-            errMsg += filepath;
+            errMsg += toUtf8(filepath);
             throw std::runtime_error(errMsg);
         }
         result[fileSize] = '\0';
@@ -113,14 +181,18 @@ namespace sibs
         return Result<StringView>::Ok(StringView(result, fileSize));
     }
 
-    Result<bool> fileOverwrite(const char *filepath, StringView data)
+    Result<bool> fileOverwrite(const _tinydir_char_t *filepath, StringView data)
     {
+#if OS_FAMILY == OS_FAMILY_POSIX
         FILE *file = fopen(filepath, "wb");
+#else
+        FILE *file = _wfopen(filepath, TINYDIR_STRING("wb"));
+#endif
         if(!file)
         {
             int error = errno;
             string errMsg = "Failed to overwrite file: ";
-            errMsg += filepath;
+            errMsg += toUtf8(filepath);
             errMsg += "; reason: ";
             errMsg += strerror(error);
             return Result<bool>::Err(errMsg);
@@ -130,8 +202,8 @@ namespace sibs
         fclose(file);
         return Result<bool>::Ok(true);
     }
-
-    const char* getHomeDir()
+#if OS_FAMILY == OS_FAMILY_POSIX
+    Result<FileString> getHomeDir()
     {
         const char *homeDir = getenv("HOME");
         if(!homeDir)
@@ -139,26 +211,25 @@ namespace sibs
             passwd *pw = getpwuid(getuid());
             homeDir = pw->pw_dir;
         }
-        return homeDir;
+        return Result<FileString>::Ok(homeDir);
     }
 
-    Result<string> getCwd()
+    Result<FileString> getCwd()
     {
-        string cwd;
-        cwd.reserve(PATH_MAX);
-        if(getcwd(&cwd[0], PATH_MAX) != 0)
+        FileString cwd;
+        cwd.resize(_TINYDIR_PATH_MAX);
+        if(getcwd(&cwd[0], _TINYDIR_PATH_MAX) != 0)
         {
             if(cwd.empty()) cwd = ".";
-            return Result<string>::Ok(cwd);
+            cwd.resize(_tinydir_strlen(cwd.c_str()));
+            return Result<FileString>::Ok(cwd);
         }
-
-        return Result<string>::Err(strerror(errno));
+        return Result<FileString>::Err(strerror(errno));
     }
 
-#if OS_FAMILY == OS_FAMILY_POSIX
-    Result<bool> createDirectoryRecursive(const char *path)
+    Result<bool> createDirectoryRecursive(const _tinydir_char_t *path)
     {
-        char pathBuffer[PATH_MAX];
+        char pathBuffer[_TINYDIR_PATH_MAX];
         size_t pathLength = strlen(path);
         if(pathLength > sizeof(pathBuffer) - 1)
         {
@@ -207,25 +278,126 @@ namespace sibs
         return Result<bool>::Ok(true);
     }
 
-    Result<string> getRealPath(const char *path)
+    Result<FileString> getRealPath(const _tinydir_char_t *path)
     {
         // TODO: Verify NULL can be passed as 'resolved' argument with different compilers and operating systems (clang, freebsd etc)
         char *resolved = realpath(path, nullptr);
         if(!resolved)
         {
             int error = errno;
-            string errMsg = "Failed to get real path for \"";
+            FileString errMsg = "Failed to get real path for \"";
             errMsg += path;
             errMsg += "\": ";
             errMsg += strerror(error);
-            return Result<string>::Err(errMsg, error);
+            return Result<FileString>::Err(errMsg, error);
         }
 
         string result = resolved;
         free(resolved);
-        return Result<string>::Ok(result);
+        return Result<FileString>::Ok(result);
     }
 #else
-#error "TODO: Implement createDirectoryRecursive and getRealPath on windows"
+
+#pragma comment(lib, "Userenv.lib")
+
+	Result<FileString> getHomeDir()
+	{
+        BOOL ret;
+        HANDLE hToken;
+        FileString homeDir;
+        DWORD homeDirLen = _TINYDIR_PATH_MAX;
+        homeDir.resize(homeDirLen);
+
+        if (!OpenProcessToken(GetCurrentProcess(), TOKEN_READ, &hToken))
+            return Result<FileString>::Err("Failed to open process token");
+
+        if (!GetUserProfileDirectory(hToken, &homeDir[0], &homeDirLen))
+            return Result<FileString>::Err("Failed to get home directory");
+
+        CloseHandle(hToken);
+        homeDir.resize(_tinydir_strlen(homeDir.c_str()));
+        return Result<FileString>::Ok(homeDir);
+	}
+
+	Result<FileString> getCwd()
+	{
+		FileString cwd;
+		cwd.resize(_TINYDIR_PATH_MAX);
+		if (GetCurrentDirectory(_TINYDIR_PATH_MAX, &cwd[0]) == 0)
+		{
+            FileString lastErrStr = getLastErrorAsString();
+            return Result<FileString>::Err(toUtf8(lastErrStr));
+		}
+        cwd.resize(_tinydir_strlen(cwd.c_str()));
+        return Result<FileString>::Ok(cwd);
+	}
+
+	Result<bool> createDirectoryRecursive(const _tinydir_char_t *path)
+	{
+        _tinydir_char_t pathBuffer[_TINYDIR_PATH_MAX];
+		size_t pathLength = _tinydir_strlen(path);
+		if (pathLength > sizeof(pathBuffer) - 1)
+		{
+			string errMsg = "Directory path too long: ";
+			errMsg += toUtf8(FileString(path, pathLength));
+			return Result<bool>::Err(errMsg, ENAMETOOLONG);
+		}
+		_tinydir_strcpy(pathBuffer, path);
+
+        _tinydir_char_t *p = pathBuffer;
+		for (size_t i = 0; i < pathLength; ++i)
+		{
+			if (i > 0 && *p == '/')
+			{
+				*p = '\0';
+				if (_wmkdir(pathBuffer) != 0)
+				{
+					int error = errno;
+					if (error != EEXIST)
+					{
+						string errMsg = "Failed to create directory: ";
+						errMsg += toUtf8(pathBuffer);
+						errMsg += "; reason: ";
+						errMsg += strerror(error);
+						return Result<bool>::Err(errMsg, error);
+					}
+				}
+				*p = '/';
+			}
+			++p;
+		}
+
+		if (_wmkdir(pathBuffer) != 0)
+		{
+			int error = errno;
+			if (error != EEXIST)
+			{
+				string errMsg = "Failed to create directory: ";
+				errMsg += toUtf8(pathBuffer);
+				errMsg += "; reason: ";
+				errMsg += strerror(error);
+				return Result<bool>::Err(errMsg, error);
+			}
+		}
+
+		return Result<bool>::Ok(true);
+	}
+
+	Result<FileString> getRealPath(const _tinydir_char_t *path)
+	{
+        FileString fullPath;
+        fullPath.resize(_TINYDIR_PATH_MAX);
+        if (GetFullPathName(path, _TINYDIR_PATH_MAX, &fullPath[0], nullptr) == 0)
+        {
+            int error = GetLastError();
+			string errMsg = "Failed to get real path for \"";
+			errMsg += toUtf8(path);
+			errMsg += "\": ";
+			errMsg += toUtf8(getLastErrorAsString());
+			return Result<FileString>::Err(errMsg, error);
+		}
+        fullPath.resize(_tinydir_strlen(fullPath.c_str()));
+		return Result<FileString>::Ok(fullPath);
+	}
 #endif
 }
\ No newline at end of file
diff --git a/src/GlobalLib.cpp b/src/GlobalLib.cpp
index cbc27bc..fde7797 100644
--- a/src/GlobalLib.cpp
+++ b/src/GlobalLib.cpp
@@ -9,23 +9,27 @@ using namespace std;
 
 namespace sibs
 {
-    Result<bool> GlobalLib::validatePackageExists(const string &globalLibRootDir, const string &name)
+    Result<bool> GlobalLib::validatePackageExists(const FileString &globalLibRootDir, const std::string &name)
     {
-        string packageDir = globalLibRootDir + "/";
+        FileString packageDir = globalLibRootDir + TINYDIR_STRING("/");
+#if OS_FAMILY == OS_FAMILY_POSIX
         packageDir += name;
+#else
+        packageDir += utf8To16(name);
+#endif
         FileType packageDirFileType = getFileType(packageDir.c_str());
         switch(packageDirFileType)
         {
             case FileType::FILE_NOT_FOUND:
             {
                 string errMsg = "Global lib dependency not found: ";
-                errMsg += name;
+                errMsg += toUtf8(packageDir);
                 return Result<bool>::Err(errMsg, DependencyError::DEPENDENCY_NOT_FOUND);
             }
             case FileType::REGULAR:
             {
                 string errMsg = "Corrupt library directory. ";
-                errMsg += packageDir;
+                errMsg += toUtf8(packageDir);
                 errMsg += " is a file, expected it to be a directory";
                 return Result<bool>::Err(errMsg);
             }
@@ -40,13 +44,13 @@ namespace sibs
         }
     }
 
-    const char *sourceFileExtensions[] = { "c", "cc", "cpp", "cxx" };
+    const _tinydir_char_t *sourceFileExtensions[] = { TINYDIR_STRING("c"),TINYDIR_STRING("cc"), TINYDIR_STRING("cpp"), TINYDIR_STRING("cxx") };
     bool isSourceFile(tinydir_file *file)
     {
         if(!file->is_reg)
             return false;
 
-        for(const char *sourceFileExtension : sourceFileExtensions)
+        for(const _tinydir_char_t *sourceFileExtension : sourceFileExtensions)
         {
             if(_tinydir_strcmp(sourceFileExtension, file->extension) == 0)
                 return true;
@@ -55,29 +59,37 @@ namespace sibs
         return false;
     }
 
-    bool isPathSubPathOf(const char *path, const string &subPathOf)
+    bool isPathSubPathOf(const _tinydir_char_t *path, const FileString &subPathOf)
     {
         return _tinydir_strncmp(path, subPathOf.c_str(), subPathOf.size()) == 0;
     }
 
-    Result<string> GlobalLib::getLibsLinkerFlags(const SibsConfig &parentConfig, const string &globalLibRootDir, const string &name, const string &version, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc)
+    Result<string> GlobalLib::getLibsLinkerFlags(const SibsConfig &parentConfig, const FileString &globalLibRootDir, const std::string &name, const std::string &version, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc)
     {
         Result<bool> packageExistsResult = validatePackageExists(globalLibRootDir, name);
         if(packageExistsResult.isErr())
             return Result<string>::Err(packageExistsResult);
 
-        string packageDir = globalLibRootDir + "/";
-        packageDir += name;
+#if OS_FAMILY == OS_FAMILY_POSIX
+        FileString namePlatformNative = name;
+        FileString versionPlatformNative = version;
+#else
+        FileString namePlatformNative = utf8To16(name);
+        FileString versionPlatformNative = utf8To16(version);
+#endif
+
+        FileString packageDir = globalLibRootDir + TINYDIR_STRING("/");
+        packageDir += namePlatformNative;
 
         // TODO: Instead of checking if version is exact match, check if package has same major version
         // and same or newer minor version
-        string foundVersion;
-        walkDir(packageDir.c_str(), [&foundVersion, &version](tinydir_file *file)
+        FileString foundVersion;
+        walkDir(packageDir.c_str(), [&foundVersion, &versionPlatformNative](tinydir_file *file)
         {
             if(file->is_dir)
             {
                 //printf("version: %s\n", file->name);
-                if(_tinydir_strcmp(version.c_str(), file->name) == 0)
+                if(_tinydir_strcmp(versionPlatformNative.c_str(), file->name) == 0)
                     foundVersion = file->name;
             }
         });
@@ -85,11 +97,11 @@ namespace sibs
         if(foundVersion.empty())
             return Result<string>::Err("Global lib dependency found, but version doesn't match dependency version", DependencyError::DEPENDENCY_VERSION_NO_MATCH);
 
-        packageDir += "/";
-        packageDir += version;
+        packageDir += TINYDIR_STRING("/");
+        packageDir += versionPlatformNative;
 
-        string projectConfFilePath = packageDir;
-        projectConfFilePath += "/project.conf";
+        FileString projectConfFilePath = packageDir;
+        projectConfFilePath += TINYDIR_STRING("/project.conf");
 
         FileType projectConfFileType = getFileType(projectConfFilePath.c_str());
         switch(projectConfFileType)
@@ -97,20 +109,20 @@ namespace sibs
             case FileType::FILE_NOT_FOUND:
             {
                 string errMsg = "Global lib dependency found: ";
-                errMsg += packageDir;
+                errMsg += toUtf8(packageDir);
                 errMsg += ", but it's missing a project.conf file";
                 return Result<string>::Err(errMsg);
             }
             case FileType::DIRECTORY:
             {
                 string errMsg = "Global lib dependency found: ";
-                errMsg += packageDir;
+                errMsg += toUtf8(packageDir);
                 errMsg += ", but it's corrupt (Found directory instead of file)";
                 return Result<string>::Err(errMsg);
             }
         }
 
-        SibsConfig sibsConfig(packageDir, parentConfig.getOptimizationLevel());
+        SibsConfig sibsConfig(parentConfig.getCompiler(), packageDir, parentConfig.getOptimizationLevel());
         Result<bool> result = Config::readFromFile(projectConfFilePath.c_str(), sibsConfig);
         if(result.isErr())
             return Result<string>::Err(result.getErrMsg());
@@ -133,7 +145,8 @@ namespace sibs
             {
                 if (isSourceFile(file))
                 {
-                    ninja.addSourceFile(file->path + sibsConfig.getProjectPath().size() + 1);
+                    string fileNameNative = toUtf8(file->path + sibsConfig.getProjectPath().size() + 1);
+                    ninja.addSourceFile(fileNameNative.c_str());
                 }
                 else
                 {
@@ -145,8 +158,11 @@ namespace sibs
                 // TODO: If compiling without "test" option, do not add test source dir to ninja. Ninja logic will then not build tests...
                 // OR I believe there is no reason to run tests in dependencies. The main projects tests should cover that?
                 // But you might want to know exactly which dependency is causing issue and which part of it...
-                if(!sibsConfig.getTestPath().empty() && isPathSubPathOf(file->path, sibsConfig.getTestPath()))
-                    ninja.addTestSourceDir(file->path);
+                if (!sibsConfig.getTestPath().empty() && isPathSubPathOf(file->path, sibsConfig.getTestPath()))
+                {
+                    string filePathUtf8 = toUtf8(file->path);
+                    ninja.addTestSourceDir(filePathUtf8.c_str());
+                }
                 else
                     walkDir(file->path, collectSourceFiles);
             }
@@ -160,36 +176,64 @@ namespace sibs
         }
         else
         {
-            string buildPath = packageDir + "/sibs-build/";
+            FileString buildPath = packageDir + TINYDIR_STRING("/sibs-build/");
             switch(sibsConfig.getOptimizationLevel())
             {
                 case OPT_LEV_DEBUG:
-                    buildPath += "debug";
+                    buildPath += TINYDIR_STRING("debug");
                     break;
                 case OPT_LEV_RELEASE:
-                    buildPath += "release";
+                    buildPath += TINYDIR_STRING("release");
                     break;
             }
 
-            string libPath = buildPath;
-            libPath += "/lib";
-            libPath += name;
-            if(sibsConfig.getPackageType() == PackageType::STATIC)
-            {
-                libPath += ".a";
-                string libPathCmd = "'";
-                libPathCmd += libPath;
-                libPathCmd += "'";
-                staticLinkerFlagCallbackFunc(libPathCmd);
-                libPath += ".a";
-            }
-            else
+            string libPath = toUtf8(buildPath);
+            switch (sibsConfig.getCompiler())
             {
-                libPath += ".so";
-                string libPathCmd = "'";
-                libPathCmd += libPath;
-                libPathCmd += "'";
-                dynamicLinkerFlagCallbackFunc(libPathCmd);
+                case Compiler::GCC:
+                {
+                    libPath += "/lib";
+                    libPath += name;
+                    if (sibsConfig.getPackageType() == PackageType::STATIC)
+                    {
+                        libPath += ".a";
+                        string libPathCmd = "'";
+                        libPathCmd += libPath;
+                        libPathCmd += "'";
+                        staticLinkerFlagCallbackFunc(libPathCmd);
+                    }
+                    else
+                    {
+                        libPath += ".so";
+                        string libPathCmd = "'";
+                        libPathCmd += libPath;
+                        libPathCmd += "'";
+                        dynamicLinkerFlagCallbackFunc(libPathCmd);
+                    }
+                    break;
+                }
+                case Compiler::MSVC:
+                {
+                    libPath += "/";
+                    libPath += name;
+                    if (sibsConfig.getPackageType() == PackageType::STATIC)
+                    {
+                        libPath += ".lib";
+                        string libPathCmd = "\"";
+                        libPathCmd += libPath;
+                        libPathCmd += "\"";
+                        staticLinkerFlagCallbackFunc(libPathCmd);
+                    }
+                    else
+                    {
+                        libPath += ".lib";
+                        string libPathCmd = "\"";
+                        libPathCmd += libPath;
+                        libPathCmd += "\"";
+                        dynamicLinkerFlagCallbackFunc(libPathCmd);
+                    }
+                    break;
+                }
             }
 
             // TODO: Use different directories depending on the project type, but .o build files should be in the same directory
@@ -214,21 +258,24 @@ namespace sibs
         url += dependency.version;
         url += ".tar.gz";
 
-        string libPath = getHomeDir();
-        libPath += "/.sibs/lib/";
-        libPath += dependency.name;
-        libPath += "/";
-        libPath += dependency.version;
+        Result<FileString> libPathResult = getHomeDir();
+        if (!libPathResult)
+            return Result<bool>::Err(libPathResult);
+        FileString libPath = libPathResult.unwrap();
+        libPath += TINYDIR_STRING("/.sibs/lib/");
+        libPath += toFileString(dependency.name);
+        libPath += TINYDIR_STRING("/");
+        libPath += toFileString(dependency.version);
 
-        string libArchivedFilePath = getHomeDir();
-        libArchivedFilePath += "/.sibs/archive/";
-        libArchivedFilePath += dependency.name;
+        FileString libArchivedFilePath = libPathResult.unwrap();
+        libArchivedFilePath += TINYDIR_STRING("/.sibs/archive/");
+        libArchivedFilePath += toFileString(dependency.name);
         Result<bool> createArchiveDirResult = createDirectoryRecursive(libArchivedFilePath.c_str());
         if(createArchiveDirResult.isErr())
             return createArchiveDirResult;
 
-        libArchivedFilePath += "/";
-        libArchivedFilePath += dependency.version;
+        libArchivedFilePath += TINYDIR_STRING("/");
+        libArchivedFilePath += toFileString(dependency.version);
         Result<bool> downloadResult = curl::downloadFile(url.c_str(), libArchivedFilePath.c_str());
         if(downloadResult.isErr())
             return downloadResult;
@@ -240,4 +287,4 @@ namespace sibs
 
         return Archive::extract(libArchivedFilePath.c_str(), libPath.c_str());
     }
-}
+}
\ No newline at end of file
diff --git a/src/PkgConfig.cpp b/src/PkgConfig.cpp
index 620b1a7..a66d5b3 100644
--- a/src/PkgConfig.cpp
+++ b/src/PkgConfig.cpp
@@ -1,4 +1,5 @@
 #include "../include/PkgConfig.hpp"
+#if OS_FAMILY == OS_FAMILY_POSIX
 #include "../include/Exec.hpp"
 
 using namespace std;
@@ -127,4 +128,5 @@ namespace sibs
             return Result<string>::Err(errMsg);
         }
     }
-}
\ No newline at end of file
+}
+#endif // OS_FAMILY_POSIX
diff --git a/src/curl.cpp b/src/curl.cpp
index 56c19ec..a3c5e28 100644
--- a/src/curl.cpp
+++ b/src/curl.cpp
@@ -5,6 +5,12 @@
 
 using namespace std;
 
+#if OS_FAMILY == OS_FAMILY_WINDOWS
+#pragma comment(lib, "Ws2_32.lib")
+#pragma comment(lib, "Wldap32.lib")
+#pragma comment(lib, "Crypt32.lib")
+#endif
+
 #ifdef DEBUG
 #define CURL_DEBUG
 #endif
@@ -44,7 +50,7 @@ namespace sibs
         return size * nmemb;
     }
 
-    Result<bool> curl::downloadFile(const char *url, const char *filepath)
+    Result<bool> curl::downloadFile(const char *url, const _tinydir_char_t *filepath)
     {
         CURL *curl_handle = curl_easy_init();
         curl_easy_setopt(curl_handle, CURLOPT_URL, url);
@@ -60,15 +66,19 @@ namespace sibs
         curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, writeToFile);
         curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, true);
         curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "SIBS");
-
+        curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, FALSE);
+#if OS_FAMILY == OS_FAMILY_POSIX
         FILE *file = fopen(filepath, "wb");
+#else
+        FILE *file = _wfopen(filepath, L"wb");
+#endif
         if(!file)
         {
             int error = errno;
             curl_easy_cleanup(curl_handle);
 
             string errMsg = "Failed to open file for writing: ";
-            errMsg += filepath;
+            errMsg += toUtf8(filepath);
             if(error != 0)
             {
                 errMsg += "; Reason: ";
@@ -131,8 +141,9 @@ namespace sibs
         curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, noProgressMeter);
         curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, writeToString);
         curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, true);
-        curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "Hacker");
-
+        curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "SIBS");
+        curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, FALSE);
+		
         curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, &result.str);
         printf("Downloading from url: %s\n", url);
         CURLcode curlResponse = curl_easy_perform(curl_handle);
diff --git a/src/main.cpp b/src/main.cpp
index 26cab5c..855b1dc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -24,6 +24,12 @@ using namespace std::chrono;
 
 // TODO: Remove install.sh when sibs supports installation of packages (so it can install itself)
 
+#if OS_FAMILY == OS_FAMILY_POSIX
+#define ferr std::cerr
+#else
+#define ferr std::wcerr
+#endif
+
 void usage()
 {
     printf("Usage: sibs COMMAND\n\n");
@@ -63,47 +69,47 @@ void usageNew()
     exit(1);
 }
 
-void validateDirectoryPath(const char *projectPath)
+void validateDirectoryPath(const _tinydir_char_t *projectPath)
 {
     FileType projectPathFileType = getFileType(projectPath);
     if(projectPathFileType == FileType::FILE_NOT_FOUND)
     {
         string errMsg = "Invalid project path: ";
-        errMsg += projectPath;
+        errMsg += toUtf8(projectPath);
         perror(errMsg.c_str());
         exit(2);
     }
     else if(projectPathFileType == FileType::REGULAR)
     {
-        cerr <<"Expected project path (" << projectPath << ") to be a directory, was a file" << endl;
+        ferr <<"Expected project path (" << projectPath << ") to be a directory, was a file" << endl;
         exit(3);
     }
 }
 
-void validateFilePath(const char *projectConfPath)
+void validateFilePath(const _tinydir_char_t *projectConfPath)
 {
     FileType projectConfFileType = getFileType(projectConfPath);
     if(projectConfFileType == FileType::FILE_NOT_FOUND)
     {
         string errMsg = "Invalid project.conf path: ";
-        errMsg += projectConfPath;
+        errMsg += toUtf8(projectConfPath);
         perror(errMsg.c_str());
         exit(4);
     }
     else if(projectConfFileType == FileType::DIRECTORY)
     {
-        cerr << "Expected project path (" << projectConfPath << ") to be a file, was a directory" << endl;
+        ferr << "Expected project path (" << projectConfPath << ") to be a file, was a directory" << endl;
         exit(5);
     }
 }
 
-const char *sourceFileExtensions[] = { "c", "cc", "cpp", "cxx" };
+const _tinydir_char_t *sourceFileExtensions[] = { TINYDIR_STRING("c"), TINYDIR_STRING("cc"), TINYDIR_STRING("cpp"), TINYDIR_STRING("cxx") };
 bool isSourceFile(tinydir_file *file)
 {
     if(!file->is_reg)
         return false;
 
-    for(const char *sourceFileExtension : sourceFileExtensions)
+    for(const _tinydir_char_t *sourceFileExtension : sourceFileExtensions)
     {
         if(_tinydir_strcmp(sourceFileExtension, file->extension) == 0)
             return true;
@@ -112,36 +118,36 @@ bool isSourceFile(tinydir_file *file)
     return false;
 }
 
-bool isPathSubPathOf(const string &path, const string &subPathOf)
+bool isPathSubPathOf(const FileString &path, const FileString &subPathOf)
 {
     return _tinydir_strncmp(path.c_str(), subPathOf.c_str(), subPathOf.size()) == 0;
 }
 
-int buildProject(int argc, const char **argv)
+int buildProject(int argc, const _tinydir_char_t **argv)
 {
     if(argc > 2)
         usageBuild();
 
     OptimizationLevel optimizationLevel = OPT_LEV_NONE;
-    string projectPath;
+    FileString projectPath;
 
     for(int i = 0; i < argc; ++i)
     {
-        const char *arg = argv[i];
-        if(strcmp(arg, "--debug") == 0)
+        const _tinydir_char_t *arg = argv[i];
+        if(_tinydir_strcmp(arg, TINYDIR_STRING("--debug")) == 0)
         {
             if(optimizationLevel != OPT_LEV_NONE)
             {
-                fprintf(stderr, "Error: Optimization level defined more than once. First defined as %s then as %s\n", asString(optimizationLevel), "debug");
+                ferr << "Error: Optimization level defined more than once. First defined as " << asString(optimizationLevel) << " then as debug" << endl;
                 usageBuild();
             }
             optimizationLevel = OPT_LEV_DEBUG;
         }
-        else if(strcmp(arg, "--release") == 0)
+        else if(_tinydir_strcmp(arg, TINYDIR_STRING("--release")) == 0)
         {
             if(optimizationLevel != OPT_LEV_NONE)
             {
-                fprintf(stderr, "Error: Optimization level defined more than once. First defined as %s then as %s\n", asString(optimizationLevel), "debug");
+                ferr << "Error: Optimization level defined more than once. First defined as " << asString(optimizationLevel) << " then as release" << endl;
                 usageBuild();
             }
             optimizationLevel = OPT_LEV_RELEASE;
@@ -150,7 +156,7 @@ int buildProject(int argc, const char **argv)
         {
             if(!projectPath.empty())
             {
-                fprintf(stderr, "Error: Project path was defined more than once. First defined as %s then as %s\n", projectPath.c_str(), arg);
+                ferr << "Error: Project path was defined more than once. First defined as " << projectPath << " then as " << arg << endl;
                 usageBuild();
             }
             projectPath = arg;
@@ -162,35 +168,43 @@ int buildProject(int argc, const char **argv)
 
     // TODO: If projectPath is not defined and working directory does not contain project.conf, then search every parent directory until one is found
     if(projectPath.empty())
-        projectPath = ".";
+        projectPath = TINYDIR_STRING(".");
 
     validateDirectoryPath(projectPath.c_str());
     if(projectPath.back() != '/')
-        projectPath += "/";
+        projectPath += TINYDIR_STRING("/");
 
-    Result<string> projectRealPathResult = getRealPath(projectPath.c_str());
+    Result<FileString> projectRealPathResult = getRealPath(projectPath.c_str());
     if(!projectRealPathResult)
     {
-        cerr << "Failed to get real path for: '" << projectPath << "': " << projectRealPathResult.getErrMsg() << endl;
+        ferr << "Failed to get real path for: '" << projectPath.c_str() << "': " << toFileString(projectRealPathResult.getErrMsg()) << endl;
         exit(40);
     }
     projectPath = projectRealPathResult.unwrap();
 
-    string projectConfFilePath = projectPath;
-    projectConfFilePath += "/project.conf";
+    FileString projectConfFilePath = projectPath;
+    projectConfFilePath += TINYDIR_STRING("/project.conf");
     validateFilePath(projectConfFilePath.c_str());
 
-    SibsConfig sibsConfig(projectPath, optimizationLevel);
+    // TODO: Detect compiler to use at runtime. Should also be configurable
+    // by passing argument to `sibs build`
+#if OS_FAMILY == OS_FAMILY_POSIX
+    Compiler compiler = Compiler::GCC;
+#else
+    Compiler compiler = Compiler::MSVC;
+#endif
+
+    SibsConfig sibsConfig(compiler, projectPath, optimizationLevel);
     Result<bool> result = Config::readFromFile(projectConfFilePath.c_str(), sibsConfig);
     if(result.isErr())
     {
-        cerr << "Failed to read config: " << result.getErrMsg() << endl;
+        ferr << "Failed to read config: " << toFileString(result.getErrMsg()) << endl;
         exit(6);
     }
 
     if(sibsConfig.getPackageName().empty())
     {
-        cerr << "project.conf is missing required field package.name" << endl;
+        ferr << "project.conf is missing required field package.name" << endl;
         exit(10);
     }
 
@@ -204,7 +218,8 @@ int buildProject(int argc, const char **argv)
         {
             if (isSourceFile(file))
             {
-                ninja.addSourceFile(file->path + sibsConfig.getProjectPath().size());
+                string filePathUtf8 = toUtf8(file->path + sibsConfig.getProjectPath().size());
+                ninja.addSourceFile(filePathUtf8.c_str());
             }
             else
             {
@@ -214,22 +229,25 @@ int buildProject(int argc, const char **argv)
         else
         {
             // TODO: If compiling without "test" option, do not add test source dir to ninja. Ninja logic will then not build tests
-            if(!sibsConfig.getTestPath().empty() && isPathSubPathOf(file->path, sibsConfig.getTestPath()))
-                ninja.addTestSourceDir(file->path);
+            if (!sibsConfig.getTestPath().empty() && isPathSubPathOf(file->path, sibsConfig.getTestPath()))
+            {
+                string filePathUtf8 = toUtf8(file->path);
+                ninja.addTestSourceDir(filePathUtf8.c_str());
+            }
             else
                 walkDir(file->path, collectSourceFiles);
         }
     };
     walkDir(projectPath.c_str(), collectSourceFiles);
 
-    string buildPath = projectPath + "/sibs-build/";
+    FileString buildPath = projectPath + TINYDIR_STRING("/sibs-build/");
     switch(sibsConfig.getOptimizationLevel())
     {
         case OPT_LEV_DEBUG:
-            buildPath += "debug";
+            buildPath += TINYDIR_STRING("debug");
             break;
         case OPT_LEV_RELEASE:
-            buildPath += "release";
+            buildPath += TINYDIR_STRING("release");
             break;
     }
 
@@ -237,7 +255,7 @@ int buildProject(int argc, const char **argv)
     Result<bool> buildFileResult = ninja.build(sibsConfig, buildPath.c_str());
     if(buildFileResult.isErr())
     {
-        cerr << "Failed to build ninja file: " << buildFileResult.getErrMsg() << endl;
+        ferr << "Failed to build ninja file: " << toFileString(buildFileResult.getErrMsg()) << endl;
         exit(7);
     }
     auto elapsedTime = duration_cast<duration<double>>(high_resolution_clock::now() - startTime);
@@ -246,37 +264,37 @@ int buildProject(int argc, const char **argv)
     return 0;
 }
 
-void newProjectCreateMainDir(const string &projectPath)
+void newProjectCreateMainDir(const FileString &projectPath)
 {
     Result<bool> createProjectDirResult = createDirectoryRecursive(projectPath.c_str());
     if(createProjectDirResult.isErr())
     {
-        cerr << "Failed to create project main directory: " << createProjectDirResult.getErrMsg() << endl;
+        ferr << "Failed to create project main directory: " << toFileString(createProjectDirResult.getErrMsg()) << endl;
         exit(20);
     }
 }
 
-void createProjectSubDir(const string &dir)
+void createProjectSubDir(const FileString &dir)
 {
     Result<bool> createProjectDirResult = createDirectoryRecursive(dir.c_str());
     if(createProjectDirResult.isErr())
     {
-        cerr << "Failed to create directory in project: " << createProjectDirResult.getErrMsg() << endl;
+        ferr << "Failed to create directory in project: " << toFileString(createProjectDirResult.getErrMsg()) << endl;
         exit(20);
     }
 }
 
-void createProjectFile(const string &projectFilePath, const string &fileContent)
+void createProjectFile(const FileString &projectFilePath, const string &fileContent)
 {
     Result<bool> fileOverwriteResult = fileOverwrite(projectFilePath.c_str(), fileContent.c_str());
     if(fileOverwriteResult.isErr())
     {
-        cerr << "Failed to create project file: " << fileOverwriteResult.getErrMsg() << endl;
+        ferr << "Failed to create project file: " << toFileString(fileOverwriteResult.getErrMsg()) << endl;
         exit(20);
     }
 }
 
-void newProjectCreateConf(const string &projectName, const string &projectType, const string &projectPath)
+void newProjectCreateConf(const string &projectName, const string &projectType, const FileString &projectPath)
 {
     string projectConfStr = "[package]\n";
     projectConfStr += "name = \"" + projectName + "\"\n";
@@ -284,98 +302,102 @@ void newProjectCreateConf(const string &projectName, const string &projectType,
     projectConfStr += "version = \"0.1.0\"\n\n";
     projectConfStr += "[dependencies]\n";
     
-    string projectConfPath = projectPath;
-    projectConfPath += "/project.conf";
+    FileString projectConfPath = projectPath;
+    projectConfPath += TINYDIR_STRING("/project.conf");
     Result<bool> fileOverwriteResult = fileOverwrite(projectConfPath.c_str(), projectConfStr.c_str());
     if(fileOverwriteResult.isErr())
     {
-        cerr << "Failed to create project.conf: " << fileOverwriteResult.getErrMsg() << endl;
+        ferr << "Failed to create project.conf: " << toFileString(fileOverwriteResult.getErrMsg()) << endl;
         exit(20);
     }
 }
 
 // This can be replaced with createDirectory and fileOverwrite, but it's not important
 // so there is no reason to do it (right now)
-Result<ExecResult> gitInitProject(const string &projectPath)
+Result<ExecResult> gitInitProject(const FileString &projectPath)
 {
-    string cmd = "git init '";
+    FileString cmd = TINYDIR_STRING("git init \"");
     cmd += projectPath;
-    cmd += "'";
+    cmd += TINYDIR_STRING("\"");
     return exec(cmd.c_str());
 }
 
-int newProject(int argc, const char **argv)
+int newProject(int argc, const _tinydir_char_t **argv)
 {
     if(argc != 2)
     {
-        cerr << "Expected 'new' command to be followed by two arguments - project name and type of project (--exec, --static or --dynamic)" << endl << endl;
+        ferr << "Expected 'new' command to be followed by two arguments - project name and type of project (--exec, --static or --dynamic)" << endl << endl;
         usageNew();
     }
     
-    Result<string> cwdResult = getCwd();
+    Result<FileString> cwdResult = getCwd();
     if(cwdResult.isErr())
     {
-        cerr << "Failed to get current working directory: " << cwdResult.getErrMsg() << endl;
+        ferr << "Failed to get current working directory: " << toFileString(cwdResult.getErrMsg()) << endl;
         exit(20);
     }
 
-    string projectName = argv[0];
-    string projectPath = cwdResult.unwrap();
-    projectPath += "/";
-    projectPath += projectName;
+    string projectName = toUtf8(argv[0]);
+    FileString projectPath = cwdResult.unwrap();
+    projectPath += TINYDIR_STRING("/");
+    projectPath += toFileString(projectName);
     bool projectPathExists = getFileType(projectPath.c_str()) != FileType::FILE_NOT_FOUND;
     if(projectPathExists)
     {
-        cerr << "Unable to create a new project at path '" << projectPath << "'. A file or directory already exists in the same location" << endl;
+        ferr << "Unable to create a new project at path '" << projectPath << "'. A file or directory already exists in the same location" << endl;
         exit(20);
     }
 
-    const char *projectType = argv[1];
+    const _tinydir_char_t *projectType = argv[1];
 
     string projectTypeConf;
-    if(strcmp(projectType, "--exec") == 0)
+    if(_tinydir_strcmp(projectType, TINYDIR_STRING("--exec")) == 0)
         projectTypeConf = "executable";
-    else if(strcmp(projectType, "--static") == 0)
+    else if(_tinydir_strcmp(projectType, TINYDIR_STRING("--static")) == 0)
         projectTypeConf = "static";
-    else if(strcmp(projectType, "--dynamic") == 0)
+    else if(_tinydir_strcmp(projectType, TINYDIR_STRING("--dynamic")) == 0)
         projectTypeConf = "dynamic";
     else
     {
-        cerr << "Expected project type to be either --exec, --static or --dynamic; was: " << projectType << endl << endl;
+        ferr << "Expected project type to be either --exec, --static or --dynamic; was: " << projectType << endl << endl;
         usageNew();
     }
     
     newProjectCreateMainDir(projectPath);
     newProjectCreateConf(projectName, projectTypeConf, projectPath);
-    createProjectSubDir(projectPath + "/src");
-    createProjectSubDir(projectPath + "/include");
-    createProjectFile(projectPath + "/src/main.cpp", "#include <cstdio>\n\nint main()\n{\n    return 0;\n}\n");
+    createProjectSubDir(projectPath + TINYDIR_STRING("/src"));
+    createProjectSubDir(projectPath + TINYDIR_STRING("/include"));
+    createProjectFile(projectPath + TINYDIR_STRING("/src/main.cpp"), "#include <cstdio>\n\nint main()\n{\n    return 0;\n}\n");
     // We are ignoring git init result on purpose. If it fails, just ignore it; not important
     gitInitProject(projectPath);
     return 0;
 }
 
-int main(int argc, const char **argv)
+#if OS_FAMILY == OS_FAMILY_POSIX
+int main(int argc, const _tinydir_char_t **argv)
+#else
+int wmain(int argc, const _tinydir_char_t **argv)
+#endif
 {
     unordered_map<string, string> param;
     unordered_set<string> flags;
 
     for(int i = 1; i < argc; ++i)
     {
-        const char *arg = argv[i];
+        const _tinydir_char_t *arg = argv[i];
         int subCommandArgCount = argc - i - 1;
-        const char **subCommandArgPtr = argv + i + 1;
-        if(strcmp(arg, "build") == 0)
+        const _tinydir_char_t **subCommandArgPtr = argv + i + 1;
+        if(_tinydir_strcmp(arg, TINYDIR_STRING("build")) == 0)
         {
             return buildProject(subCommandArgCount, subCommandArgPtr);
         }
-        else if(strcmp(arg, "new") == 0)
+        else if(_tinydir_strcmp(arg, TINYDIR_STRING("new")) == 0)
         {
             return newProject(subCommandArgCount, subCommandArgPtr);
         }
         else
         {
-            cerr << "Expected command to be either 'build' or 'new', was: " << arg << endl << endl;
+            ferr << "Expected command to be either 'build' or 'new', was: " << arg << endl << endl;
             usage();
         }
     }