X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=d659d4f76f955702f8cec22cdeb184feffffd3ae;hp=8c9ce5aa3edc9b6d76ed84de70c95c9516c804f6;hb=344730037990a22ff80e47f39598536c260ab49b;hpb=e72596d1f179c11231458344449b508a6dcb9096

diff --git a/configure.ac b/configure.ac
index 8c9ce5a..d659d4f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,12 +2,13 @@
 # Process this file with autoconf to produce a configure script.
 
 
-AC_INIT([userspace-rcu], [0.2.3-alpha], [mathieu dot desnoyers at polymtl dot ca])
+AC_INIT([userspace-rcu], [0.2.4], [mathieu dot desnoyers at polymtl dot ca])
 AC_CONFIG_AUX_DIR([config])
 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])
 
@@ -15,6 +16,8 @@ AC_CONFIG_HEADERS([config.h urcu/config.h])
 AH_TEMPLATE([CONFIG_URCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.])
 AH_TEMPLATE([CONFIG_URCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
 AH_TEMPLATE([CONFIG_URCU_HAVE_FUTEX], [Defined when on a system with futex support.])
+AH_TEMPLATE([CONFIG_URCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks
+cmpxchg instruction.])
 
 # Checks for programs.
 AC_PROG_CC
@@ -34,9 +37,9 @@ AC_CHECK_FUNCS([bzero gettimeofday munmap strtoul])
 # Find arch type
 case $target_cpu in
 	i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
-	i486) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
-	i586) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
-	i686) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
+	i486) ARCHTYPE="x86";;
+	i586) ARCHTYPE="x86";;
+	i686) ARCHTYPE="x86";;
 	x86_64) ARCHTYPE="x86";;
 	powerpc) ARCHTYPE="ppc" ;;
 	ppc64) ARCHTYPE="ppc" ;;
@@ -54,7 +57,11 @@ 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$target_cpu" != "xi686"; then
 ]
 	AC_DEFINE([CONFIG_URCU_HAVE_FENCE], [1])
 [
@@ -89,6 +96,14 @@ AM_CONDITIONAL([GCC_API], [test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc])
 
 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ])
 
+[
+if test "x$SUBARCHTYPE" = xx86compat; then
+]
+	AC_DEFINE([CONFIG_URCU_COMPAT_ARCH], [1])
+[
+fi
+]
+
 AC_ARG_ENABLE([smp-support], [  --disable-smp-support   Disable SMP support. Warning: only use this
                           on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"])