From 27a515f9dd89103d14f2b5182b2cb7460d80c2d2 Mon Sep 17 00:00:00 2001
From: Troels Henriksen <athas@sigkill.dk>
Date: Wed, 1 Jan 2025 22:44:30 +0100
Subject: [PATCH] mosml: pass -fpermissive to C compiler

The MosML build system relies on some terrible C that GCC 14 now
refuses to compile. This has supposedly been fixed in MosML upstream,
but the fix is not yet in any released version. It is not so easy to
simply cherry-pick the changes necessary to make GCC 14 work, since
they seem spread over various different commits. This change serves to
make this rather obscure derivation work for a little while longer.
---
 pkgs/by-name/mo/mosml/package.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/by-name/mo/mosml/package.nix b/pkgs/by-name/mo/mosml/package.nix
index 755a002ebff5..2bd5a6b1c0a0 100644
--- a/pkgs/by-name/mo/mosml/package.nix
+++ b/pkgs/by-name/mo/mosml/package.nix
@@ -20,6 +20,8 @@ stdenv.mkDerivation rec {
     "CC=${stdenv.cc.targetPrefix}cc"
   ];
 
+  env.NIX_CFLAGS_COMPILE = "-fpermissive";
+
   src = fetchFromGitHub {
     owner = "kfl";
     repo = "mosml";