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_MACRO_DIR([m4])
AC_CONFIG_HEADERS([config.h urcu/config.h])
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])
[