improve building on darwin

build.zig

@@ -4,6 +4,7 @@ const LibExeObjStep = std.build.LibExeObjStep;
 const glfw = @import("vendor/mach/glfw/build.zig");
 const ft = @import("src/freetype/build.zig");
 const uv = @import("src/libuv/build.zig");
+const system_sdk = @import("vendor/mach/glfw/system_sdk.zig");
 
 pub fn build(b: *std.build.Builder) !void {
     const target = b.standardTargetOptions(.{});
@@ -26,6 +27,7 @@ pub fn build(b: *std.build.Builder) !void {
     ftlib.link(exe);
 
     const libuv = try uv.create(b, target, mode);
+    system_sdk.include(b, libuv.step, .{});
     libuv.link(exe);
 
     // stb if we need it

src/libuv/build.zig

@@ -50,6 +50,13 @@ pub fn create(
         });
     }
 
+    if (target.isDarwin()) {
+        try flags.appendSlice(&.{
+            "-D_DARWIN_UNLIMITED_SELECT=1",
+            "-D_DARWIN_USE_64_BIT_INODE=1",
+        });
+    }
+
     // C files common to all platforms
     ret.addCSourceFiles(&.{
         root() ++ "src/fs-poll.c",
@@ -106,6 +113,32 @@ pub fn create(
         }, flags.items);
     }
 
+    if (target.isDarwin() or
+        target.isOpenBSD() or
+        target.isNetBSD() or
+        target.isFreeBSD() or
+        target.isDragonFlyBSD())
+    {
+        ret.addCSourceFiles(&.{
+            root() ++ "src/unix/bsd-ifaddrs.c",
+            root() ++ "src/unix/kqueue.c",
+        }, flags.items);
+    }
+
+    if (target.isDarwin() or target.isOpenBSD()) {
+        ret.addCSourceFiles(&.{
+            root() ++ "src/unix/random-getentropy.c",
+        }, flags.items);
+    }
+
+    if (target.isDarwin()) {
+        ret.addCSourceFiles(&.{
+            root() ++ "src/unix/darwin-proctitle.c",
+            root() ++ "src/unix/darwin.c",
+            root() ++ "src/unix/fsevents.c",
+        }, flags.items);
+    }
+
     ret.addIncludeDir(include_dir);
     ret.addIncludeDir(root() ++ "src");
     if (target.isWindows()) {