# Process this file with autoconf to produce a configure script.
-#AC_PREREQ([2.63])
-AC_INIT([userspace-rcu], [0.2.2], [mathieu dot desnoyers at polymtl dot ca])
+AC_INIT([userspace-rcu], [0.3.1], [mathieu dot desnoyers at polymtl dot ca])
AC_CONFIG_AUX_DIR([config])
-AC_CONFIG_MACRO_DIR([m4])
+AC_CANONICAL_TARGET
+AC_CANONICAL_HOST
AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
AC_CONFIG_SRCDIR([urcu.h])
-AC_CONFIG_HEADERS([config.h])
+AM_PROG_MKDIR_P
+
+AC_CONFIG_HEADERS([config.h urcu/config.h])
+
+# Keep at the end to do not pollute installed header.
+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
# Find arch type
case $host_cpu in
+ i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
+ i486) ARCHTYPE="x86";;
+ i586) ARCHTYPE="x86";;
+ i686) ARCHTYPE="x86";;
x86_64) ARCHTYPE="x86";;
- i586) ARCHTYPE="x86" ;;
- i686) ARCHTYPE="x86" ;;
powerpc) ARCHTYPE="ppc" ;;
ppc64) ARCHTYPE="ppc" ;;
+ powerpc64) ARCHTYPE="ppc" ;;
ppc) ARCHTYPE="ppc" ;;
s390) ARCHTYPE="s390" ;;
s390x) ARCHTYPE="s390" ;;
+ sparc64) ARCHTYPE="sparc64" ;;
*) ARCHTYPE="unknown";;
esac
AC_MSG_ERROR([Unable to detect the architecture.])
fi
AC_SUBST(ARCHTYPE)
+AC_SUBST(SUBARCHTYPE)
+
+[
+#if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586"; then
+#For now, using lock; addl compatibility mode even for i686, because the
+#Pentium III is seen as a i686, but lacks mfence instruction.
+#Only using fence for x86_64.
+if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"; then
+]
+ AC_DEFINE([CONFIG_URCU_HAVE_FENCE], [1])
+[
+fi
+]
+
+AC_MSG_CHECKING([sys_futex()])
+AC_TRY_COMPILE(
+[
+#include <sys/syscall.h>
+],
+[
+#ifndef __NR_futex
+#error "futexes not available"
+#endif
+],
+[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([CONFIG_URCU_HAVE_FUTEX], [1])
+ compat_futex_test=0
+]
+,
+[
+ AC_MSG_RESULT([no])
+ compat_futex_test=1
+]
+)
+
+AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ])
AM_CONDITIONAL([GCC_API], [test "x$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"])
+
+[
+if test "$def_smp_support" = "no"; then
+ echo "SMP support disabled."
+else
+]
+ AC_DEFINE([CONFIG_URCU_SMP], [1])
+[
+ echo "SMP support enabled."
+fi
+]
AC_CONFIG_FILES([
Makefile