From 6c60d3d38ac1512df424ea474dc9e71373b2fe80 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Mon, 9 May 2022 08:18:31 +0100
Subject: [PATCH] gqview: add -fcommon workaround

Without the change build fails on -fno-common toolchains like upstream
gcc-10 as:

    $ nix build -L --impure --expr 'with import ./. {}; gqview.overrideAttrs (oa: {   NIX_CFLAGS_COMPILE = (["-fno-common"] ++ [oa.NIX_CFLAGS_COMPILE or ""]); })'
    ...
    ld: pan-view.o:/build/gqview-2.1.5/src/bar_exif.h:27:
      multiple definition of `bar_exif_key_list'; bar_exif.o:/build/gqview-2.1.5/src/bar_exif.h:27: first defined here
---
 pkgs/applications/graphics/gqview/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/applications/graphics/gqview/default.nix b/pkgs/applications/graphics/gqview/default.nix
index 427429404a0..3dbd1e0d77b 100644
--- a/pkgs/applications/graphics/gqview/default.nix
+++ b/pkgs/applications/graphics/gqview/default.nix
@@ -15,6 +15,7 @@ stdenv.mkDerivation rec {
 
   hardeningDisable = [ "format" ];
 
+  NIX_CFLAGS_COMPILE = "-fcommon";
   NIX_LDFLAGS = "-lm";
 
   meta = with lib; {