From 9afc2ee682d2f9fd3ad938756c841d7f0eed5f21 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Thu, 11 Jul 2013 12:03:57 +1000 Subject: [PATCH] powerpc: enhance 32/64bit detection We were using uname to determine if userspace was 32 or 64bit. This fails when we have a 64bit kernel and a 32bit userspace. * configure.ac (powerpc*): Similar to x86, use a runtime test to determine if we are 32 or 64bit. Signed-off-by: Anton Blanchard --- configure.ac | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/configure.ac b/configure.ac index 03e49fef..b3b62e88 100644 --- a/configure.ac +++ b/configure.ac @@ -54,7 +54,11 @@ alpha*) powerpc*) arch=powerpc AC_DEFINE([POWERPC], 1, [Define for the PowerPC architecture.]) - if test $host_cpu = powerpc64; then + AC_TRY_COMPILE( +[#ifndef __LP64__ +# error 32 bit +#endif], [], ppc_bits=64, ppc_bits=32) + if test "$ppc_bits" = "64"; then AC_DEFINE([POWERPC64], 1, [Define for the PowerPC64 architecture.]) fi ;; -- 2.50.1