X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=fed15ee8d624a970125809cb239ebbcc99bf4e3f;hp=8c9ce5aa3edc9b6d76ed84de70c95c9516c804f6;hb=94b343fd8d68512d78d8646c646c15a1b3f84186;hpb=e72596d1f179c11231458344449b508a6dcb9096

diff --git a/configure.ac b/configure.ac
index 8c9ce5a..fed15ee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,6 +8,7 @@ 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_HEADERS([config.h urcu/config.h])
 
@@ -54,7 +55,11 @@ 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])
 [