Merge pull request #172766 from trofi/workaround-fno-common-for-cuneiform

cuneiform: add -fcommon workaround

pkgs/tools/graphics/cuneiform/default.nix

@@ -20,6 +20,12 @@ stdenv.mkDerivation {
   })
   ];
 
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: CMakeFiles/rbal.dir/src/statsearchbl.cpp.o:(.bss+0x0):
+  #     multiple definition of `minrow'; CMakeFiles/rbal.dir/src/linban.c.o:(.bss+0xa3a): first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
   postPatch = ''
     rm cuneiform_src/Kern/hhh/tigerh/h/strings.h
   '';