findNative

pub fn findNative(args: FindNativeOptions) FindError!LibCInstallation {
    var self: LibCInstallation = .{};

    if (is_darwin and args.target.os.tag.isDarwin()) {
        if (!std.zig.system.darwin.isSdkInstalled(args.allocator))
            return error.DarwinSdkNotFound;
        const sdk = std.zig.system.darwin.getSdk(args.allocator, args.target) orelse
            return error.DarwinSdkNotFound;
        defer args.allocator.free(sdk);

        self.include_dir = try fs.path.join(args.allocator, &.{
            sdk, "usr/include",
        });
        self.sys_include_dir = try fs.path.join(args.allocator, &.{
            sdk, "usr/include",
        });
        return self;
    } else if (is_windows) {
        const sdk = std.zig.WindowsSdk.find(args.allocator, args.target.cpu.arch) catch |err| switch (err) {
            error.NotFound => return error.WindowsSdkNotFound,
            error.PathTooLong => return error.WindowsSdkNotFound,
            error.OutOfMemory => return error.OutOfMemory,
        };
        defer sdk.free(args.allocator);

        try self.findNativeMsvcIncludeDir(args, sdk);
        try self.findNativeMsvcLibDir(args, sdk);
        try self.findNativeKernel32LibDir(args, sdk);
        try self.findNativeIncludeDirWindows(args, sdk);
        try self.findNativeCrtDirWindows(args, sdk);
    } else if (is_haiku) {
        try self.findNativeIncludeDirPosix(args);
        try self.findNativeGccDirHaiku(args);
        self.crt_dir = try args.allocator.dupeZ(u8, "/system/develop/lib");
    } else if (builtin.target.os.tag.isSolarish()) {
        // There is only one libc, and its headers/libraries are always in the same spot.
        self.include_dir = try args.allocator.dupeZ(u8, "/usr/include");
        self.sys_include_dir = try args.allocator.dupeZ(u8, "/usr/include");
        self.crt_dir = try args.allocator.dupeZ(u8, "/usr/lib/64");
    } else if (std.process.can_spawn) {
        try self.findNativeIncludeDirPosix(args);
        switch (builtin.target.os.tag) {
            .freebsd, .netbsd, .openbsd, .dragonfly => self.crt_dir = try args.allocator.dupeZ(u8, "/usr/lib"),
            .linux => try self.findNativeCrtDirPosix(args),
            else => {},
        }
    } else {
        return error.LibCRuntimeNotFound;
    }
    return self;
}