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

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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.
This commit is contained in:
Adam Joseph 2023-06-10 13:00:00 -07:00
parent fa9859507b
commit 7eaaa6ef22
1 changed files with 13 additions and 1 deletions
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14
pkgs/development/libraries/openssl/default.nix
View file

@ -142,7 +142,19 @@ let
# trying to build binaries statically.
++ lib.optional static "no-ct"
++ lib.optional withZlib "zlib"
;
++ lib.optionals (stdenv.hostPlatform.isMips && stdenv.hostPlatform ? gcc.arch) [
# This is necessary in order to avoid openssl adding -march
# flags which ultimately conflict with those added by
# cc-wrapper. Openssl assumes that it can scan CFLAGS to
# detect any -march flags, using this perl code:
#
# && !grep { $_ =~ /-m(ips|arch=)/ } (@{$config{CFLAGS}})
#
# The following bogus CFLAGS environment variable triggers the
# the code above, inhibiting `./Configure` from adding the
# conflicting flags.
"CFLAGS=-march=${stdenv.hostPlatform.gcc.arch}"
];
makeFlags = [
"MANDIR=$(man)/share/man"