zatackax: enable on darwin (#459206)

pkgs/by-name/za/zatackax/0001-Fix-SDL_main-redefinition-issue-on-macOS.patch

@@ -0,0 +1,25 @@
+From 9cf8d3f1025689f3765da2f0a27561a6bfe5c3cb Mon Sep 17 00:00:00 2001
+From: Moraxyc <i@qaq.li>
+Date: Fri, 7 Nov 2025 00:23:44 +0800
+Subject: [PATCH] Fix SDL_main redefinition issue on macOS
+
+---
+ src/zatackax.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/zatackax.c b/src/zatackax.c
+index dad2fa9..47a8bd7 100644
+--- a/src/zatackax.c
++++ b/src/zatackax.c
+@@ -16,6 +16,8 @@
+  */
+ 
+ #include "zatackax.h"
++// override SDL_main.h redefining main to SDL_main on darwin
++#define main main
+ 
+ static const unsigned int FPS_CAP = 100;
+ 
+-- 
+2.51.0
+

pkgs/by-name/za/zatackax/package.nix

@@ -21,6 +21,17 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-1m99hi0kjpj5Yl1nAmwSMMdQWcP0rfLLPFJPkU4oVbM=";
   };
 
+  # src/zatackax.c:2069:5: error: conflicting types for 'SDL_main'
+  # Fix SDL_main redefinition issue on darwin
+  patches = lib.optional stdenv.hostPlatform.isDarwin ./0001-Fix-SDL_main-redefinition-issue-on-macOS.patch;
+
+  # malloc.h is not needed because stdlib.h is already included.
+  # On darwin, malloc.h does not even exist, resulting in an error.
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
+    substituteInPlace src/zatackax.h \
+      --replace-fail '#include <malloc.h>' ""
+  '';
+
   strictDeps = true;
 
   nativeBuildInputs = [
@@ -45,6 +56,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.gpl3Plus;
     maintainers = [ lib.maintainers.alch-emi ];
     mainProgram = "zatackax";
-    platforms = lib.platforms.linux;
+    platforms = with lib.platforms; linux ++ darwin;
   };
 })