From 06a8f20762dacbefb6a38b3d379c133d3167c2de Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Thu, 2 Jun 2022 23:29:05 +0100
Subject: [PATCH] ufoai: add -fcommon workaround

Workaround build failure on -fno-common toolchains like upstream
gcc-10. Otherwise build fails as:

    ld: r_gl.h:52: multiple definition of `qglGenBuffers';
      r_gl.h:52: first defined here
---
 pkgs/games/ufoai/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/games/ufoai/default.nix b/pkgs/games/ufoai/default.nix
index 1dc2abbf7624..f596ac2756b6 100644
--- a/pkgs/games/ufoai/default.nix
+++ b/pkgs/games/ufoai/default.nix
@@ -14,6 +14,13 @@ stdenv.mkDerivation rec {
     sha256 = "1drhh08cqqkwv1yz3z4ngkplr23pqqrdx6cp8c3isy320gy25cvb";
   };
 
+  # Workaround build failure on -fno-common toolchains:
+  #   ld: r_gl.h:52: multiple definition of `qglGenBuffers';
+  #     r_gl.h:52: first defined here
+  # TODO: drop once release contains upstream fix:
+  #   https://github.com/ufoai/ufoai/commit/8a3075fffdad294e
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
   preConfigure = ''tar xvf "${srcData}"'';
 
   configureFlags = [ "--enable-release" "--enable-sse" ]