using addCMacro instead of defineCMacro (#4620)

Co-authored-by: Johannes Rønning <johannes@picterus.com>

build.zig

@@ -13,9 +13,9 @@ comptime {
 
 fn setDesktopPlatform(raylib: *std.Build.Step.Compile, platform: PlatformBackend) void {
     switch (platform) {
-        .glfw => raylib.defineCMacro("PLATFORM_DESKTOP_GLFW", null),
-        .rgfw => raylib.defineCMacro("PLATFORM_DESKTOP_RGFW", null),
-        .sdl => raylib.defineCMacro("PLATFORM_DESKTOP_SDL", null),
+        .glfw => raylib.root_module.addCMacro("PLATFORM_DESKTOP_GLFW", ""),
+        .rgfw => raylib.root_module.addCMacro("PLATFORM_DESKTOP_RGFW", ""),
+        .sdl => raylib.root_module.addCMacro("PLATFORM_DESKTOP_SDL", ""),
         else => {},
     }
 }
@@ -173,7 +173,7 @@ fn compileRaylib(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.
     }
 
     if (options.opengl_version != .auto) {
-        raylib.defineCMacro(options.opengl_version.toCMacroStr(), null);
+        raylib.root_module.addCMacro(options.opengl_version.toCMacroStr(), "");
     }
 
     raylib.addIncludePath(b.path("src/platforms"));
@@ -191,7 +191,7 @@ fn compileRaylib(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.
                 try c_source_files.append("src/rglfw.c");
 
                 if (options.linux_display_backend == .X11 or options.linux_display_backend == .Both) {
-                    raylib.defineCMacro("_GLFW_X11", null);
+                    raylib.root_module.addCMacro("_GLFW_X11", "");
                     raylib.linkSystemLibrary("GLX");
                     raylib.linkSystemLibrary("X11");
                     raylib.linkSystemLibrary("Xcursor");
@@ -211,7 +211,7 @@ fn compileRaylib(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.
                         , .{});
                         @panic("`wayland-scanner` not found");
                     };
-                    raylib.defineCMacro("_GLFW_WAYLAND", null);
+                    raylib.root_module.addCMacro("_GLFW_WAYLAND", "");
                     raylib.linkSystemLibrary("EGL");
                     raylib.linkSystemLibrary("wayland-client");
                     raylib.linkSystemLibrary("xkbcommon");
@@ -230,16 +230,16 @@ fn compileRaylib(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.
             } else {
                 if (options.opengl_version == .auto) {
                     raylib.linkSystemLibrary("GLESv2");
-                    raylib.defineCMacro("GRAPHICS_API_OPENGL_ES2", null);
+                    raylib.root_module.addCMacro("GRAPHICS_API_OPENGL_ES2", "");
                 }
 
                 raylib.linkSystemLibrary("EGL");
                 raylib.linkSystemLibrary("gbm");
                 raylib.linkSystemLibrary2("libdrm", .{ .use_pkg_config = .force });
 
-                raylib.defineCMacro("PLATFORM_DRM", null);
-                raylib.defineCMacro("EGL_NO_X11", null);
-                raylib.defineCMacro("DEFAULT_BATCH_BUFFER_ELEMENT", "2048");
+                raylib.root_module.addCMacro("PLATFORM_DRM", "");
+                raylib.root_module.addCMacro("EGL_NO_X11", "");
+                raylib.root_module.addCMacro("DEFAULT_BATCH_BUFFER_ELEMENT", "");
             }
         },
         .freebsd, .openbsd, .netbsd, .dragonfly => {
@@ -290,9 +290,9 @@ fn compileRaylib(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.
                 raylib.addIncludePath(dep.path("upstream/emscripten/cache/sysroot/include"));
             }
 
-            raylib.defineCMacro("PLATFORM_WEB", null);
+            raylib.root_module.addCMacro("PLATFORM_WEB", "");
             if (options.opengl_version == .auto) {
-                raylib.defineCMacro("GRAPHICS_API_OPENGL_ES2", null);
+                raylib.root_module.addCMacro("GRAPHICS_API_OPENGL_ES2", "");
             }
         },
         else => {

examples/build.zig

@@ -46,7 +46,7 @@ fn add_module(comptime module: []const u8, b: *std.Build, target: std.Build.Reso
                 exe.linkSystemLibrary("gdi32");
                 exe.linkSystemLibrary("opengl32");
 
-                exe.defineCMacro("PLATFORM_DESKTOP", null);
+                exe.root_module.addCMacro("PLATFORM_DESKTOP", "");
             },
             .linux => {
                 exe.linkSystemLibrary("GL");
@@ -55,7 +55,7 @@ fn add_module(comptime module: []const u8, b: *std.Build, target: std.Build.Reso
                 exe.linkSystemLibrary("m");
                 exe.linkSystemLibrary("X11");
 
-                exe.defineCMacro("PLATFORM_DESKTOP", null);
+                exe.root_module.addCMacro("PLATFORM_DESKTOP", "");
             },
             .macos => {
                 exe.linkFramework("Foundation");
@@ -65,7 +65,7 @@ fn add_module(comptime module: []const u8, b: *std.Build, target: std.Build.Reso
                 exe.linkFramework("CoreVideo");
                 exe.linkFramework("IOKit");
 
-                exe.defineCMacro("PLATFORM_DESKTOP", null);
+                exe.root_module.addCMacro("PLATFORM_DESKTOP", "");
             },
             else => {
                 @panic("Unsupported OS");