rtags: fix darwin build

Changed files
+2 -1
pkgs
development
tools
rtags
+2 -1
pkgs/development/tools/rtags/default.nix
···
version = "2.12";
nativeBuildInputs = [ cmake pkgconfig ];
-
buildInputs = [ llvmPackages.clang-unwrapped llvmPackages.llvm openssl emacs ]
+
buildInputs = [ llvmPackages.llvm openssl emacs ]
+
++ lib.optionals stdenv.cc.isGNU [ llvmPackages.clang-unwrapped ]
++ lib.optionals stdenv.isDarwin [ apple_sdk.libs.xpc apple_sdk.frameworks.CoreServices ];