From a45936728a83cca77573b21a4d0cef79b898d689 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Sat, 14 May 2022 09:54:30 +0100
Subject: [PATCH] egoboo: add -fcommon workaround

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

        ld: mad.o:(.bss+0x233800): multiple definition of `tile_dict'; camera.o:(.bss+0x140): first defined here
---
 pkgs/games/egoboo/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/games/egoboo/default.nix b/pkgs/games/egoboo/default.nix
index 506868efe31..4023eccec44 100644
--- a/pkgs/games/egoboo/default.nix
+++ b/pkgs/games/egoboo/default.nix
@@ -45,6 +45,11 @@ stdenv.mkDerivation rec {
     '';
   */
 
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: mad.o:(.bss+0x233800): multiple definition of `tile_dict'; camera.o:(.bss+0x140): first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
   NIX_LDFLAGS = "-lm";
 
   meta = {