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[Bug target/70454] New: --with-arch=native isn't applied to 32-bit x86 target library


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70454

            Bug ID: 70454
           Summary: --with-arch=native isn't applied to 32-bit x86 target
                    library
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: ubizjak at gmail dot com
  Target Milestone: ---
            Target: x86-64

libatomic/configure.tgt, libgomp/configure.tgt and
libitm/configure.tgt have

    i[456]86-*-linux*)
        config_path="linux/x86 linux posix"
        case " ${CC} ${CFLAGS} " in
          *" -m64 "*|*" -mx32 "*)
            ;;
          *)
            if test -z "$with_arch"; then
              XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
            fi
        esac
        ;;

    # Similar jiggery-pokery for x86_64 multilibs, except here we
    # can't rely on the --with-arch configure option, since that
    # applies to the 64-bit side.
    x86_64-*-linux*)
        config_path="linux/x86 linux posix"
        case " ${CC} ${CFLAGS} " in
          *" -m32 "*)
            XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
            ;;
        esac
        ;;

"if test -z "$with_arch"; then" is missing from x86-64 target.

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