Add support for dynamic libraries (shared objects)

1 files changed, 87 insertions, 29 deletions

diff --git a/backend/ninja/Ninja.cpp b/backend/ninja/Ninja.cpp
index ede150c..d8345a4 100644
--- a/backend/ninja/Ninja.cpp
+++ b/backend/ninja/Ninja.cpp
@@ -81,7 +81,7 @@ namespace backend
 
     // 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 vector<Dependency> &dependencies, LinkerFlagCallbackFunc linkerFlagCallbackFunc) const
+    Result<bool> Ninja::getLinkerFlags(const vector<Dependency> &dependencies, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallback) const
     {
         if(dependencies.empty()) return Result<bool>::Ok(true);
 
@@ -120,13 +120,13 @@ namespace backend
         else
         {
             if(!pkgConfigLinkerFlagsResult.unwrap().empty())
-                linkerFlagCallbackFunc(pkgConfigLinkerFlagsResult.unwrap());
+                dynamicLinkerFlagCallback(pkgConfigLinkerFlagsResult.unwrap());
         }
 
         for(const Dependency &globalLibDependency : globalLibDependencies)
         {
             printf("Dependency %s is missing from pkg-config, trying global lib\n", globalLibDependency.name.c_str());
-            Result<string> globalLibLinkerFlagsResult = GlobalLib::getStaticLibsLinkerFlags(globalLibDir, globalLibDependency.name, globalLibDependency.version, linkerFlagCallbackFunc);
+            Result<string> globalLibLinkerFlagsResult = GlobalLib::getLibsLinkerFlags(globalLibDir, globalLibDependency.name, globalLibDependency.version, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallback);
             if(globalLibLinkerFlagsResult.isErr())
             {
                 if(globalLibLinkerFlagsResult.getErrorCode() == GlobalLib::DependencyError::DEPENDENCY_NOT_FOUND || globalLibLinkerFlagsResult.getErrorCode() == GlobalLib::DependencyError::DEPENDENCY_VERSION_NO_MATCH)
@@ -142,7 +142,7 @@ namespace backend
                     if(downloadDependencyResult.isErr())
                         return downloadDependencyResult;
 
-                    globalLibLinkerFlagsResult = GlobalLib::getStaticLibsLinkerFlags(globalLibDir, globalLibDependency.name, globalLibDependency.version, linkerFlagCallbackFunc);
+                    globalLibLinkerFlagsResult = GlobalLib::getLibsLinkerFlags(globalLibDir, globalLibDependency.name, globalLibDependency.version, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallback);
                     if(globalLibLinkerFlagsResult.isErr())
                         return Result<bool>::Err(globalLibLinkerFlagsResult);
                 }
@@ -156,8 +156,9 @@ namespace backend
         return Result<bool>::Ok(true);
     }
 
-    Result<bool> Ninja::createBuildFile(const std::string &packageName, const vector<Dependency> &dependencies, const char *savePath, LinkerFlagCallbackFunc linkerFlagCallbackFunc)
+    Result<bool> Ninja::createBuildFile(const std::string &packageName, const vector<Dependency> &dependencies, const char *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())
             return Result<bool>::Err("No source files provided");
 
@@ -178,35 +179,50 @@ namespace backend
         result += globalLibDir;
         result += "'\n\n";
 
-        result += "rule cpp_COMPILER\n";
-        result += "  command = ccache c++ $ARGS -c $in -o $out\n\n";
-
-        string linkerJob;
+        string buildJob;
         switch(libraryType)
         {
             case LibraryType::EXECUTABLE:
             {
-                result += "rule cpp_EXEC_LINKER\n";
+                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";
-                linkerJob = "cpp_EXEC_LINKER";
+                buildJob = "cpp_BUILD_EXEC";
                 break;
             }
             case LibraryType::STATIC:
             {
-                result += "rule cpp_STATIC_LINKER\n";
+                result += "rule cpp_COMPILER\n";
+                result += "  command = ccache c++ $ARGS -c -fPIC $in -o $out\n\n";
+
+                result += "rule cpp_BUILD_STATIC\n";
                 result += "  command = ar rcs lib";
                 result += packageName;
                 result += ".a";
                 result += " $in\n\n";
-                linkerJob = "cpp_STATIC_LINKER";
+                buildJob = "cpp_BUILD_STATIC";
+                break;
+            }
+            case LibraryType::DYNAMIC:
+            {
+                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";
+                buildJob = "cpp_BUILD_DYNAMIC";
                 break;
             }
             default:
                 assert(false);
-                return Result<bool>::Err("Building a dynamic library is not supported yet");
+                return Result<bool>::Err("Unexpected error");
         }
 
         vector<string> objectNames;
+        objectNames.reserve(sourceFiles.size());
         for(const string &sourceFile : sourceFiles)
         {
             // TODO: Handle tests differently.
@@ -227,46 +243,80 @@ namespace backend
             objectNames.emplace_back(objectName);
         }
 
+        string allLinkerFlags;
+        if(!staticLinkerFlagCallbackFunc || libraryType == LibraryType::DYNAMIC)
+        {
+            staticLinkerFlagCallbackFunc = [&allLinkerFlags](const string &linkerFlag)
+            {
+                allLinkerFlags += " ";
+                allLinkerFlags += linkerFlag;
+            };
+        }
+
+        // TODO: If project contains no source files, then we shouldn't override this function
+        dynamicLinkerFlagCallback = [&allLinkerFlags](const string &linkerFlag)
+        {
+            allLinkerFlags += " ";
+            allLinkerFlags += linkerFlag;
+        };
+
         switch(libraryType)
         {
             case LibraryType::EXECUTABLE:
             {
-                string allLinkerFlags;
-                Result<bool> linkerFlags = getLinkerFlags(dependencies, [&allLinkerFlags](const string &linkerFlag)
-                {
-                    allLinkerFlags += " ";
-                    allLinkerFlags += linkerFlag;
-                });
+                Result<bool> linkerFlags = getLinkerFlags(dependencies, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallback);
                 if(linkerFlags.isErr())
                     return Result<bool>::Err(linkerFlags.getErrMsg());
 
                 result += "build ";
                 result += packageName;
-                result += ": " + linkerJob + " ";
+                result += ": " + buildJob + " ";
                 result += join(objectNames, " ");
                 result += "\n";
-                result += "  LINK_ARGS = '-Wl,--no-undefined' '-Wl,--as-needed' ";
-                result += allLinkerFlags;
+                result += "  LINK_ARGS = '-Wl,--no-undefined,--as-needed' ";
+                if(!allLinkerFlags.empty())
+                {
+                    result += allLinkerFlags;
+                }
                 result += "\n\n";
                 break;
             }
             case LibraryType::STATIC:
             {
-                string allLinkerFlags;
-                Result<bool> linkerFlags = getLinkerFlags(dependencies, linkerFlagCallbackFunc);
+                Result<bool> linkerFlags = getLinkerFlags(dependencies, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallback);
                 if(linkerFlags.isErr())
                     return linkerFlags;
 
                 result += "build ";
                 result += packageName;
-                result += ": " + linkerJob + " ";
+                result += ": " + buildJob + " ";
                 result += join(objectNames, " ");
                 result += "\n\n";
                 break;
             }
+            case LibraryType::DYNAMIC:
+            {
+                Result<bool> linkerFlags = getLinkerFlags(dependencies, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallback);
+                if(linkerFlags.isErr())
+                    return Result<bool>::Err(linkerFlags.getErrMsg());
+
+                result += "build lib";
+                result += packageName;
+                result += ".so: " + buildJob + " ";
+                result += join(objectNames, " ");
+                result += "\n";
+                result += "  LINK_ARGS = '-Wl,--no-undefined,--as-needed' ";
+                if(!allLinkerFlags.empty())
+                {
+                    result += allLinkerFlags;
+                    //result += " '-Wl,--no-whole-archive'";
+                }
+                result += "\n\n";
+                break;
+            }
             default:
                 assert(false);
-                return Result<bool>::Err("Building a dynamic library is not supported yet");
+                return Result<bool>::Err("Unexpected error");
         }
 
         Result<bool> fileOverwriteResult = sibs::fileOverwrite(ninjaBuildFilePath.c_str(), sibs::StringView(result.data(), result.size()));
@@ -282,9 +332,17 @@ namespace backend
         string command = "ninja -C '";
         command += buildFilePath;
         command += "'";
-        Result<ExecResult> execResult = exec(command.c_str(), true);
+        Result<ExecResult> execResult = exec(command.c_str());
         if(execResult.isOk())
-            return Result<bool>::Ok(true);
+        {
+            if(execResult.unwrap().exitCode == 0)
+            {
+                printf("%s", execResult.unwrap().execStdout.c_str());
+                return Result<bool>::Ok(true);
+            }
+            else
+                return Result<bool>::Err(execResult.unwrap().execStdout);
+        }
         else
             return Result<bool>::Err(execResult.getErrMsg());
     }