openssl: prevent -march= flags from being added on mips

Openssl assumes that CFLAGS contains all of the flags that will be
passed to the compiler.  This assumption fails for nixpkgs due to
our cc-wrapper.

On mips platforms, openssl scans CFLAGS to see if the user passed a
-march flag; if not, it adds its own:

  if ($target =~ /linux.*-mips/ && !$disabled{asm}
        && !grep { $_ =~ /-m(ips|arch=)/ } (@{$config{CFLAGS}})) {
        # minimally required architecture flags for assembly modules
        my $value;
        $value = '-mips2' if ($target =~ /mips32/);
        $value = '-mips3' if ($target =~ /mips64/);
        unshift @{$config{cflags}}, $value;
        unshift @{$config{cxxflags}}, $value if $config{CXX};
  }

Unfortunately since nixpkgs adds `-march=` in the wrapper, rather
than the CFLAGS, openssl can't see it.  The result is two
conflicting `-march=` flags and a build failure when the user has
customized `hostPlatform.gcc.arch`:

  openssl-mips64el-unknown-linux-gnuabin32> mips64el-unknown-linux-gnuabin32-gcc  -I. -Iinclude -Iapps/include  -fPIC -pthread -mabi=n32 -mips3 -Wa,--noexecstack -Wall -O3 -DOPENSSL_USE_NODELETE -DOPENSSL_PIC -DOPENSSLDIR="\"/nix/store/8kwvrgwdk56ml6sz5swr71fv9mv4592w-openssl-mips64el-unknown-linux-gnuabin32-3.0.9/etc/ssl\"" -DENGINESDIR="\"/nix/store/8kwvrgwdk56ml6sz5swr71fv9mv4592w-openssl-mips64el-unknown-linux-gnuabin32-3.0.9/lib/engines-3\"" -DMODULESDIR="\"/nix/store/8kwvrgwdk56ml6sz5swr71fv9mv4592w-openssl-mips64el-unknown-linux-gnuabin32-3.0.9/lib/ossl-modules\"" -DOPENSSL_BUILDING_OPENSSL -DNDEBUG  -MMD -MF apps/lib/libapps-lib-engine.d.tmp -MT apps/lib/libapps-lib-engine.o -c -o apps/lib/libapps-lib-engine.o apps/lib/engine.c
  cc1: error: '-mips3' conflicts with the other architecture options, which specify a mips64r2 processor
  cc1: error: '-mips3' conflicts with the other architecture options, which specify a mips64r2 processor
  make[1]: *** [Makefile:4254: apps/lib/libapps-lib-app_libctx.o] Error 1
  make[1]: *** Waiting for unfinished jobs....
  make[1]: *** [Makefile:4262: apps/lib/libapps-lib-app_params.o] Error 1
  make[1]: *** [Makefile:4270: apps/lib/libapps-lib-app_provider.o] Error 1

This commit defeats the perl code above by passing `CFLAGS=-march`
to openssl's `./Configure` script.

0 files changed, 0 insertions, 0 deletions