* Test for case where user is building 32 bit on Opteron. In such a case,

we should fall back to IA32 assembly instructions

This commit was SVN r6859.

config/ompi_config_asm.m4

@@ -731,7 +731,11 @@ case "${host}" in
     ;;
 
     x86_64*)
-        ompi_cv_asm_arch="AMD64"
+        if test "$ac_cv_sizeof_long" = "4" ; then
+                ompi_cv_asm_arch="IA32"
+        else
+                ompi_cv_asm_arch="AMD64"
+        fi
         OMPI_ASM_SUPPORT_64BIT=1
         OMPI_GCC_INLINE_ASSIGN='"movl [$]0, %0" : "=&r"(ret)'
     ;;