b=5278

[fs/lustre-release.git] / build / autoconf / lustre-build.m4

diff --git a/build/autoconf/lustre-build.m4 b/build/autoconf/lustre-build.m4
index e8a546b..2a1b1d0 100644 (file)
--- a/build/autoconf/lustre-build.m4
+++ b/build/autoconf/lustre-build.m4
@@ -317,6 +317,16 @@ if test $ac_cv_sizeof_unsigned_long_long != 8 ; then
         AC_MSG_ERROR([** we assume that sizeof(long long) == 8.  Tell phil@clusterfs.com])
 fi
 
+AC_MSG_CHECKING([if $CC accepts -m64])
+CFLAGS_save="$CFLAGS"
+CFLAGS="-m64 $CFLAGS"
+AC_TRY_COMPILE([],[],[
+       AC_MSG_RESULT([yes])
+],[
+       AC_MSG_RESULT([no])
+       CFLAGS="$CFLAGS_save"
+])
+
 CPPFLAGS="-I\$(top_srcdir)/lustre/include -I\$(top_srcdir)/portals/include $CPPFLAGS"
 
 LLCPPFLAGS="-D__arch_lib__ -D_LARGEFILE64_SOURCE=1"