Fix various things, add generated zig header files to global include

Fix compile_commands.json missing build steps.
Fix c includes -> zig includes flags.
Fix crash when running sibs new/init without defining lang.
Add generated zig header files to global include so they can be used
from c/c++.
Add zig and zig/c (using zig and c in the same project) examples.

2 files changed, 22 insertions, 0 deletions

diff --git a/examples/hello_world_c_zig/src/foo.zig b/examples/hello_world_c_zig/src/foo.zig
new file mode 100644
index 0000000..464eadd
--- /dev/null
+++ b/examples/hello_world_c_zig/src/foo.zig
@@ -0,0 +1,8 @@
+const warn = @import("std").debug.warn;
+
+extern fn baz() void;
+
+export fn foo() void {
+    warn("zig called from c!\n");
+    baz();
+}
diff --git a/examples/hello_world_c_zig/src/main.c b/examples/hello_world_c_zig/src/main.c
new file mode 100644
index 0000000..aeaeae4
--- /dev/null
+++ b/examples/hello_world_c_zig/src/main.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <zig/src/foo.h>
+
+void baz()
+{
+    printf("c called from zig!\n");
+}
+
+int main(int argc, char **argv)
+{
+    printf("inside c\n");
+    foo();
+    return 0;
+}