[Libunwind-devel] [PATCH 1/7] ppc32: ppc64: use AC_COMPILE_IFELSE to test __powerpc64__ macro for ppc64

[Cody P Schafer]

powerpc64 compilers on RHEL 6.3 (and my own built locally) do not
default to 32bit. Actually check for the bit mode.
---
 configure.in | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/configure.in b/configure.in
index 081ccee..917a2c9 100644
--- a/configure.in
+++ b/configure.in
@@ -71,12 +71,7 @@ dnl Checks for library functions.
 AC_FUNC_MEMCMP
 AC_CHECK_FUNCS(dl_iterate_phdr dl_phdr_removals_counter dlmodinfo getunwind \
                ttrace mincore)
-is_gcc_m64() {
- if test `echo $CFLAGS | grep "\-m64" -c` -eq 1 ; then echo ppc64;
- else
-  if test `echo $CC | grep "\-m64" -c` -eq 1 ; then echo ppc64; else echo 
ppc32; fi;
- fi;
-}
+
 
 is_gcc_altivec() {
  if test `echo $CFLAGS | grep "\-maltivec" -c` -eq 1 ; then echo has_altivec;
@@ -94,13 +89,19 @@ else
   AC_MSG_RESULT([no])
 fi
 
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#ifndef __powerpc64__
+# error choke
+#endif
+]])], [ppc_bits=64], [ppc_bits=32])
+
 get_arch() {
  case "$1" in
   arm*) echo arm;;
   i?86) echo x86;;
   hppa*) echo hppa;;
   mips*) echo mips;;
-  powerpc*) is_gcc_m64;;
+  powerpc*) echo ppc$ppc_bits;;
   amd64) echo x86_64;;
   *) echo $1;;
  esac
-- 
1.7.11.3