add basic header file setup

Signed-off-by: Stephen Gutekanst <[email protected]>

build.zig

@@ -10,6 +10,7 @@ pub fn build(b: *std.Build) void {
         .target = target,
         .optimize = optimize,
     });
+    lib.installHeadersDirectory("include/mach", "mach");
     b.installArtifact(lib);
 
     const main_tests = b.addTest(.{

include/mach/core.h

@@ -0,0 +1,51 @@
+#ifndef MACH_CORE_H_
+#define MACH_CORE_H_
+
+#if defined(MACH_SHARED_LIBRARY)
+#    if defined(_WIN32)
+#        if defined(MACH_IMPLEMENTATION)
+#            define MACH_EXPORT __declspec(dllexport)
+#        else
+#            define MACH_EXPORT __declspec(dllimport)
+#        endif
+#    else  // defined(_WIN32)
+#        if defined(MACH_IMPLEMENTATION)
+#            define MACH_EXPORT __attribute__((visibility("default")))
+#        else
+#            define MACH_EXPORT
+#        endif
+#    endif  // defined(_WIN32)
+#else       // defined(MACH_SHARED_LIBRARY)
+#    define MACH_EXPORT
+#endif  // defined(MACH_SHARED_LIBRARY)
+
+#if !defined(MACH_OBJECT_ATTRIBUTE)
+#define MACH_OBJECT_ATTRIBUTE
+#endif
+#if !defined(MACH_ENUM_ATTRIBUTE)
+#define MACH_ENUM_ATTRIBUTE
+#endif
+#if !defined(MACH_STRUCTURE_ATTRIBUTE)
+#define MACH_STRUCTURE_ATTRIBUTE
+#endif
+#if !defined(MACH_FUNCTION_ATTRIBUTE)
+#define MACH_FUNCTION_ATTRIBUTE
+#endif
+#if !defined(MACH_NULLABLE)
+#define MACH_NULLABLE
+#endif
+
+#include <stdint.h>
+#include <stddef.h>
+
+// TODO: implement this section
+// see e.g. https://github.com/webgpu-native/webgpu-headers/blob/main/webgpu.h
+// for how to write a modern C API header
+
+#endif  // !defined(MACH_SKIP_DECLARATIONS)
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // MACH_CORE_H_