Merge pull request #18275 from taktoa/patch-1

libmsgpack: fixed mingw32 cross-build

pkgs/development/libraries/libmsgpack/generic.nix

···
 
   inherit src patches;
 
-  buildInputs = [ cmake ];
+  nativeBuildInputs = [ cmake ];
+
+  crossAttrs = {
+  } // stdenv.lib.optionalAttrs (stdenv.cross.libc == "msvcrt") {
+    cmakeFlags = "-DMSGPACK_BUILD_EXAMPLES=OFF -DCMAKE_SYSTEM_NAME=Windows";
+  };
 
   meta = with stdenv.lib; {
     description = "MessagePack implementation for C and C++";