X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=configure.ac;h=ca711ad79be36c87c03fc1281084cc214b0338a7;hb=0f4ac97ffd64ada974285b893ca1a594a6f003ff;hp=8c9ce5aa3edc9b6d76ed84de70c95c9516c804f6;hpb=e72596d1f179c11231458344449b508a6dcb9096;p=urcu.git

diff --git a/configure.ac b/configure.ac
index 8c9ce5a..ca711ad 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,6 +8,8 @@ AC_CANONICAL_TARGET
 AC_CANONICAL_HOST
 AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
 AC_CONFIG_SRCDIR([urcu.h])
+AM_PROG_MKDIR_P
+AC_CONFIG_MACRO_DIR([m4])
 
 AC_CONFIG_HEADERS([config.h urcu/config.h])
 
@@ -54,7 +56,11 @@ AC_SUBST(ARCHTYPE)
 AC_SUBST(SUBARCHTYPE)
 
 [
-if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586"; then
+#if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586"; then
+#For now, using lock; addl compatibility mode even for i686, because the
+#Pentium III is seen as a i686, but lacks mfence instruction.
+#Only using fence for x86_64.
+if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586" -a "x$target_cpu" != "xi686"; then
 ]
 	AC_DEFINE([CONFIG_URCU_HAVE_FENCE], [1])
 [