libfyaml: patch for libm "none required" issues

pkgs/by-name/li/libfyaml/package.nix

@@ -38,6 +38,16 @@ stdenv.mkDerivation (finalAttrs: {
     # don't force -lpthread when PTHREAD_CFLAGS already provides pthread support.
     # Pending PR: https://github.com/pantoniou/libfyaml/pull/294
     ./pthread-darwin.patch
+
+    # backport "build: don't output 'none required' to LIBM if no linker flags needed for it"
+    (fetchpatch {
+      url = "https://github.com/pantoniou/libfyaml/commit/24b18e7363b336962fe160c1dc05ca57ba95783c.diff";
+      hash = "sha256-g5QKI4HuS8MEQ9ddIQNC0j+28Dh9zLAp5RaZX5SWBHk=";
+    })
+    (fetchpatch {
+      url = "https://github.com/pantoniou/libfyaml/commit/9f2492ca27bb1fda64f2b12edc2da17406208b93.diff";
+      hash = "sha256-E4wS+P7R3VGrBpD7swWMMi/QPTF+9rzAeEyxhbmdiwk=";
+    })
   ];
 
   nativeBuildInputs = [