x86-64 multilib patch

[Bo Thorsen]

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"

-- 

     Bo Thorsen                 |   Praestevejen 4
     Senior Software Engineer   |   5290 Marslev
     Klarälvdalens Datakonsult  |   Denmark