Remove command line option from the gfortran wrapper

Development
1

The gildas package fails to build on Hydra x86_64-darwin because the log file size exceeds the maximum allowed size. This is because the gfortran wrapper on Darwin adds a number of command line options which are passed along to clang:

gfortran -c   -fimplicit-none -Wuninitialized -Wunused-variable -Wunused-label   -I./ -I./built/x86_64-darwin-gfortran-openmp -I/private/tmp/nix-build-gildas-20180801_a.drv-0/gildas-src-aug18a/integ/x86_64-darwin-gfortran-openmp/include -Wrealloc-lhs-all -J./built/x86_64-darwin-gfortran-openmp -pipe -fno-backslash -fno-range-check -fno-second-underscore -fPIC -fopenmp -O built/x86_64-darwin-gfortran-openmp/newdat.f90 -o built/x86_64-darwin-gfortran-openmp/newdat.o
clang-5.0: warning: argument unused during compilation: '-D _FORTIFY_SOURCE=2' [-Wunused-command-line-argument]
clang-5.0: warning: argument unused during compilation: '-fstack-protector-strong' [-Wunused-command-line-argument]
clang-5.0: warning: argument unused during compilation: '--param ssp-buffer-size=4' [-Wunused-command-line-argument]
clang-5.0: warning: argument unused during compilation: '-fno-strict-overflow' [-Wunused-command-line-argument]
[...]

How can I remove the -Wunused-command-line-argument option when building on Darwin?

2

I’ve just opened an issue on GitHub.

3

Something like this is usually the correct solution, since these issues generally depend on the compiler being used. Clang is a bit stricter about a bunch of stuff compared to gcc.

stdenv.mkDerivation {
  # ...
  NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.cc.isClang
    "-Wno-unused-command-line-argument";
}
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