gfortran-darwin: disable format hardening

pkgs/development/compilers/gcc/gfortran-darwin.nix

@@ -7,12 +7,18 @@
 stdenv.mkDerivation rec {
   name = "gfortran-${version}";
   version = "5.1.0";
-  buildInputs = [gmp mpfr libmpc isl_0_14 cloog zlib];
+
+  buildInputs = [ gmp mpfr libmpc isl_0_14 cloog zlib ];
+
   src = fetchurl {
     url = "mirror://gnu/gcc/gcc-${version}/gcc-${version}.tar.bz2";
     sha256 = "1bd5vj4px3s8nlakbgrh38ynxq4s654m6nxz7lrj03mvkkwgvnmp";
   };
+
   patches = ./gfortran-darwin.patch;
+
+  hardeningDisable = [ "format" ];
+
   configureFlags = ''
     --disable-bootstrap
     --disable-cloog-version-check
@@ -28,11 +34,15 @@ stdenv.mkDerivation rec {
     --with-native-system-header-dir=${Libsystem}/include
     --with-system-zlib
   '';
+
   postConfigure = ''
     export DYLD_LIBRARY_PATH=`pwd`/`uname -m`-apple-darwin`uname -r`/libgcc
   '';
-  makeFlags = ["CC=clang"];
+
+  makeFlags = [ "CC=clang" ];
+
   passthru.cc = stdenv.cc.cc;
+
   meta = with stdenv.lib; {
     description = "GNU Fortran compiler, part of the GNU Compiler Collection";
     homepage    = "https://gcc.gnu.org/fortran/";