rcs: Fix build on gcc 5

http://hydra.nixos.org/build/32624218

+1 -1
+1 -1
pkgs/applications/version-management/rcs/default.nix
··· 12 12 13 13 doCheck = true; 14 14 15 - NIX_CFLAGS_COMPILE = if stdenv.isDarwin then "-std=gnu99" else null; 15 + NIX_CFLAGS_COMPILE = [ "-std=c99" ]; 16 16 17 17 meta = { 18 18 homepage = http://www.gnu.org/software/rcs/;