# Process this file with autoconf to produce a configure script.
-AC_INIT([userspace-rcu],[0.6.7],[mathieu dot desnoyers at efficios dot com])
+AC_INIT([userspace-rcu],[0.7.4],[mathieu dot desnoyers at efficios dot com])
# Following the numbering scheme proposed by libtool for the library version
# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-AC_SUBST([URCU_LIBRARY_VERSION], [1:0:0])
+AC_SUBST([URCU_LIBRARY_VERSION], [2:0:0])
AC_CONFIG_AUX_DIR([config])
AC_CONFIG_MACRO_DIR([config])
AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+m4_include([config/ax_tls.m4])
+
AC_CONFIG_SRCDIR([urcu.h])
AC_CONFIG_HEADERS([config.h urcu/config.h])
AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
+AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
+
+# Allow overriding storage used for TLS variables.
+AC_ARG_ENABLE([compiler-tls],
+ AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
+ [def_compiler_tls=$enableval],
+ [def_compiler_tls="yes"])
+
+# If not overridden, use ax_tls.m4 to check if TLS is available.
+AS_IF([test "x$def_compiler_tls" = "xyes"],
+ [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
+ [:])
+
+AS_IF([test "x$def_tls_detect" = "x"],
+ [:],
+ [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
# Checks for programs.
AC_PROG_CC
[alpha*], [ARCHTYPE="alpha"],
[ia64], [ARCHTYPE="gcc"],
[arm*], [ARCHTYPE="arm"],
+ [mips*], [ARCHTYPE="mips"],
+ [tile*], [ARCHTYPE="tile"],
[ARCHTYPE="unknown"]
)
# ARM-specific checks
AS_IF([test "x$ARCHTYPE" = "xarm"],[
AC_MSG_CHECKING([for dmb instruction])
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]], [[asm volatile("dmb":::"memory");]])],[
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+ int main()
+ {
+ asm volatile("dmb":::"memory");
+ return 0;
+ }
+ ]])
+ ],[
AC_MSG_RESULT([yes])
AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
],[
# Check if sys_futex() is available
AC_MSG_CHECKING([for sys_futex()])
-AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <sys/syscall.h>
#ifndef __NR_futex
#error "futexes not available"
#endif
- ])
+ ]])
],[
AC_MSG_RESULT([yes])
AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#define _GNU_SOURCE
#include <sched.h>
- ]],[[
- cpu_set_t foo; CPU_ZERO (&foo);
+ int main()
+ {
+ cpu_set_t foo; CPU_ZERO (&foo);
+ return 0;
+ }
]])
],[
# Works!
AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <sched.h>
- ]],[[
- cpu_set_t foo;
- sched_setaffinity (0, sizeof (foo), &foo);
+ int main()
+ {
+ cpu_set_t foo;
+ sched_setaffinity (0, sizeof (foo), &foo);
+ return 0;
+ }
]])
],
[sched_set_affinity_args=3],
])
AC_CONFIG_FILES([
Makefile
+ doc/Makefile
tests/Makefile
liburcu.pc
liburcu-bp.pc
],[
AS_ECHO("SMP support disabled.")
])
+
+AS_IF([test "x$def_tls_detect" = "x"],[
+ AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
+],[
+ AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
+])