Re: x86-64 multilib patch

[Andreas Jaeger]

What is the status of this patch?  Following up the discussion on the
gcc-patches mailing list about this one, I've added support for some
more platforms.  Can somebody commit this, please?

Thanks,
Andreas

Bo Thorsen <address@hidden> writes:

> Hi all,
>
> This patch fixes 32 bit compilation on x86-64. The problem is that "ld -r" is 
> used for building libraries and ld doesn't understand linking 32 bit objects 
> unless it's given the -m elf_i386 switch.
>
> If it's Ok, can someone else commit it please? (And let me know if it's been 
> done; I have permission to check it into gcc once it's in libtool cvs.)
>
> 2002-10-02  Bo Thorsen  <address@hidden>
>
>         * libtool.m4: Fix x86-64 multilib linking.
>
> Index: libtool.m4
> ===================================================================
> RCS file: /cvsroot/libtool/libtool/libtool.m4,v
> retrieving revision 1.264
> diff -u -r1.264 libtool.m4
> --- libtool.m4        10 Sep 2002 13:50:06 -0000      1.264
> +++ libtool.m4        2 Oct 2002 06:54:15 -0000
> @@ -477,6 +477,19 @@
>    rm -rf conftest*
>    ;;
>  
> +x86_64*linux*)
> +  # Find out which ABI we are using.
> +  echo 'int i;' > conftest.$ac_ext
> +  if AC_TRY_EVAL(ac_compile); then
> +    case "`/usr/bin/file conftest.o`" in
> +    *32-bit*)
> +      LD="${LD-ld} -m elf_i386"
> +      ;;
> +    esac
> +  fi
> +  rm -rf conftest*
> +  ;;
> +
>  *-*-sco3.2v5*)
>    # On SCO OpenServer 5, we need -belf to get full-featured binaries.
>    SAVE_CFLAGS="$CFLAGS"

2002-10-18  Andreas Jaeger  <address@hidden>,
            Bo Thorsen  <address@hidden>

        * libtool.m4: Support linking of 32-bit libraries with ld
        on the x86-64, ppc64, s390x and sparc64 GNU/Linux systems.

Index: libtool.m4
===================================================================
RCS file: /cvs/libtool/libtool.m4,v
retrieving revision 1.268
diff -u -p -r1.268 libtool.m4
--- libtool.m4  15 Oct 2002 22:50:58 -0000      1.268
+++ libtool.m4  18 Oct 2002 08:26:07 -0000
@@ -477,6 +477,33 @@ ia64-*-hpux*)
   rm -rf conftest*
   ;;
 
+x86_64-*linux*|ppc64-*linux*|s390x-*linux*|sparc64-*linux*)
+  # Find out which ABI we are using.
+  echo 'int i;' > conftest.$ac_ext
+  if AC_TRY_EVAL(ac_compile); then
+    case "`/usr/bin/file conftest.o`" in
+    *32-bit*)
+      case $host in
+       x86_64-*linux*)
+         LD="${LD-ld} -m elf_i386"
+         ;;
+       ppc64-*linux*)
+         LD="${LD-ld} -m elf32ppclinux"
+         ;;
+       s390x-*linux*)
+         LD="${LD-ld} -m elf_s390"
+         ;;
+       sparc64-*linux*)
+         LD="${LD-ld} -m elf32_sparc"
+         ;;
+      esac
+      ;;
+    esac
+  fi
+  rm -rf conftest*
+  ;;
+
+
 *-*-sco3.2v5*)
   # On SCO OpenServer 5, we need -belf to get full-featured binaries.
   SAVE_CFLAGS="$CFLAGS"

-- 
 Andreas Jaeger
  SuSE Labs address@hidden
   private address@hidden
    http://www.suse.de/~aj