uatomic compat: complete i386 support

[urcu.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index ca711ad79be36c87c03fc1281084cc214b0338a7..9bb763d27600c0b0d9dde9f8068ac7d191819117 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2,14 +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], [0.2.3], [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_MACRO_DIR([m4])
 
 AC_CONFIG_HEADERS([config.h urcu/config.h])
 
@@ -17,6 +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
@@ -36,9 +37,9 @@ AC_CHECK_FUNCS([bzero gettimeofday munmap strtoul])
 # Find arch type
 case $target_cpu in
        i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
-       i486) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
-       i586) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
-       i686) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
+       i486) ARCHTYPE="x86";;
+       i586) ARCHTYPE="x86";;
+       i686) ARCHTYPE="x86";;
        x86_64) ARCHTYPE="x86";;
        powerpc) ARCHTYPE="ppc" ;;
        ppc64) ARCHTYPE="ppc" ;;
@@ -95,6 +96,14 @@ AM_CONDITIONAL([GCC_API], [test "x$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"])