amd-libflame: fix build with gcc-14 (#404458)

Author: risicle

pkgs/by-name/am/amd-libflame/package.nix

@@ -31,6 +31,8 @@ stdenv.mkDerivation rec {
     substituteInPlace CMakeLists.txt --replace '-mtune=native' ""
   '';
 
+  env.NIX_CFLAGS_COMPILE = "-Wno-implicit-function-declaration";
+
   passthru = {
     inherit blas64;
   };