bash: Fix FreeBSD cross build

    + ''

      -DNON_INTERACTIVE_LOGIN_SHELLS

      -DSSH_SOURCE_BASHRC

    ''

    # Bash's configure script assumes that CC and CC_FOR_BUILD have the

    # same default -std=... flags. But at this moment, for FreeBSD, we

    # have CC_FOR_BUILD that defaults to c23, and a CC that default to

    # something older, perhaps c17. This breaks the build because of

    # bash's faulty assumptions.

    #

    # To fix, we simply force the standard to be the higher for CC to

    # match CC_FOR_BUILD.

    #

    # Once FreeBSD is built with a newer version of Clang, this hack

    # should be removed.

    +

      lib.optionalString (stdenv.hostPlatform.isFreeBSD && stdenv.hostPlatform != stdenv.buildPlatform)

        ''

          -std=c23

        '';

    patchFlags = [ "-p0" ];