I was recently handed
https://bugzilla.redhat.com/attachment.cgi?id=480307
for which a kindly GCC expert attached the enclosed patch. Apparently
this only causes problems on 32-bit i686 machines, which could by why
it has gone undetected until now.
-- JF
--- openmpi-1.5/opal/config/opal_config_asm.m4.jj 2010-09-28
23:33:51.000000000 +0200
+++ openmpi-1.5/opal/config/opal_config_asm.m4 2011-02-23 01:39:21.191433509
+0100
@@ -885,7 +885,7 @@ AC_DEFUN([OMPI_CONFIG_ASM],[
ompi_cv_asm_arch="AMD64"
fi
OPAL_ASM_SUPPORT_64BIT=1
- OMPI_GCC_INLINE_ASSIGN='"xaddl %1,%0" : "=m"(ret), "+r"(negone)'
+ OMPI_GCC_INLINE_ASSIGN='"xaddl %1,%0" : "=m"(ret), "+r"(negone) :
"m"(ret)'
;;
ia64-*)
