Merge pull request #265971 from wegank/cogl-clang-16

cogl, clutter: fix build with clang 16

pkgs/development/libraries/clutter/default.nix

···
     "--enable-quartz-backend=yes"
   ];
 
+  env = lib.optionalAttrs stdenv.cc.isClang {
+    NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
+  };
+
   #doCheck = true; # no tests possible without a display
 
   passthru = {

pkgs/development/libraries/cogl/default.nix

···
   buildInputs = lib.optionals pangoSupport [ pango cairo harfbuzz ]
     ++ lib.optionals stdenv.isDarwin [ OpenGL ];
 
-  COGL_PANGO_DEP_CFLAGS = toString (lib.optionals (stdenv.isDarwin && pangoSupport) [
-    "-I${pango.dev}/include/pango-1.0"
-    "-I${cairo.dev}/include/cairo"
-    "-I${harfbuzz.dev}/include/harfbuzz"
-  ]);
+  env = {
+    COGL_PANGO_DEP_CFLAGS = toString (lib.optionals (stdenv.isDarwin && pangoSupport) [
+      "-I${pango.dev}/include/pango-1.0"
+      "-I${cairo.dev}/include/cairo"
+      "-I${harfbuzz.dev}/include/harfbuzz"
+    ]);
+  } // lib.optionalAttrs stdenv.cc.isClang {
+    NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
+  };
 
   #doCheck = true; # all tests fail (no idea why)