From e14ad06f085ff7144d6d055e605b6ba4b956340a Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Fri, 3 Jun 2022 07:57:41 +0100
Subject: [PATCH] wml: add -fcommon workaround

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

    ld: iselect_browse.o:(.bss+0x2020): multiple definition of `Line'; iselect_main.o:(.bss+0x100000): first defined here
---
 pkgs/development/web/wml/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/web/wml/default.nix b/pkgs/development/web/wml/default.nix
index a6ffe6e84e3f..ff3d20f16dab 100644
--- a/pkgs/development/web/wml/default.nix
+++ b/pkgs/development/web/wml/default.nix
@@ -28,6 +28,10 @@ perlPackages.buildPerlPackage {
 
   patches = [ ./redhat-with-thr.patch ./dynaloader.patch ./no_bitvector.patch ];
 
+  # Workaround build failure on -fno-common toolchains:
+  #   ld: iselect_browse.o:(.bss+0x2020): multiple definition of `Line'; iselect_main.o:(.bss+0x100000): first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
   hardeningDisable = [ "format" ];
 
   postPatch = ''