X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;ds=sidebyside;f=configure.ac;h=fed15ee8d624a970125809cb239ebbcc99bf4e3f;hb=94b343fd8d68512d78d8646c646c15a1b3f84186;hp=3a2674753b16bb4163cff611937c59e85744506f;hpb=7dd8417e70a581e78759d067396d7858c7cb5157;p=urcu.git

diff --git a/configure.ac b/configure.ac
index 3a26747..fed15ee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,7 +8,7 @@ AC_CANONICAL_TARGET
 AC_CANONICAL_HOST
 AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
 AC_CONFIG_SRCDIR([urcu.h])
-AC_PROG_MKDIR_P
+AM_PROG_MKDIR_P
 
 AC_CONFIG_HEADERS([config.h urcu/config.h])
 
@@ -55,7 +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])
 [