wlcs: Fix GCC 14 compat

pkgs/by-name/wl/wlcs/package.nix

@@ -3,6 +3,7 @@
   lib,
   gitUpdater,
   fetchFromGitHub,
+  fetchpatch,
   testers,
   cmake,
   pkg-config,
@@ -23,6 +24,15 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-BQPRymkbGu4YvTYXTaTMuyP5fHpqMWI4xPwjDRHZNEQ=";
   };
 
+  patches = [
+    # Remove when version > 1.7.0
+    (fetchpatch {
+      name = "0001-wlcs-Fix-GCC14-compat.patch";
+      url = "https://github.com/canonical/wlcs/commit/5c812e560052e2cbff4c6d26439935020ddee52f.patch";
+      hash = "sha256-8YrVKhgpTYZi8n4dZ4pRWJoAcZtr9eaFMv0NNV7/kWU=";
+    })
+  ];
+
   strictDeps = true;
 
   nativeBuildInputs = [
@@ -38,6 +48,9 @@ stdenv.mkDerivation (finalAttrs: {
     wayland-scanner # needed by cmake
   ];
 
+  # GCC14-exclusive maybe-uninitialized error at higher optimisation levels that looks weird
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isGNU "-Wno-error=maybe-uninitialized";
+
   passthru = {
     tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
     updateScript = gitUpdater {