# 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], [0.4.6], [mathieu dot desnoyers at efficios dot com])
AC_CONFIG_AUX_DIR([config])
+AC_CANONICAL_TARGET
+AC_CANONICAL_HOST
AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
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_RCU_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_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
+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.])
# Checks for programs.
AC_PROG_CC
# Find arch type
case $host_cpu in
+ i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
+ i486) ARCHTYPE="x86";;
+ i586) ARCHTYPE="x86";;
+ i686) ARCHTYPE="x86";;
x86_64) ARCHTYPE="x86";;
- i586) ARCHTYPE="x86" ;;
- i686) ARCHTYPE="x86" ;;
powerpc) ARCHTYPE="ppc" ;;
ppc64) ARCHTYPE="ppc" ;;
+ powerpc64) ARCHTYPE="ppc" ;;
ppc) ARCHTYPE="ppc" ;;
s390) ARCHTYPE="s390" ;;
s390x) ARCHTYPE="s390" ;;
+ sparc64) ARCHTYPE="sparc64" ;;
+ alpha*) ARCHTYPE="alpha" ;;
+ ia64) ARCHTYPE="gcc" ;;
+ armv7l) ARCHTYPE="armv7l" ;;
*) ARCHTYPE="unknown";;
esac
-if test "$ARCHTYPE" = "unknown"; then
- AC_MSG_ERROR([Unable to detect the architecture.])
+UATOMICSRC=urcu/uatomic_arch_$ARCHTYPE.h
+ARCHSRC=urcu/arch_$ARCHTYPE.h
+if test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc; then
+ APISRC=tests/api_gcc.h
+else
+ APISRC=tests/api_$ARCHTYPE.h
fi
+if test "$ARCHTYPE" == "armv7l"; then
+ CFLAGS="-mcpu=cortex-a9 -mtune=cortex-a9 -O"
+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$host_cpu" != "xi686"; then
+]
+ AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
+[
+fi
+]
+
+AC_MSG_CHECKING([sys_futex()])
+AC_TRY_COMPILE(
+[
+#include <sys/syscall.h>
+],
+[
+#ifndef __NR_futex
+#error "futexes not available"
+#endif
+],
+[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
+ compat_futex_test=0
+]
+,
+[
+ AC_MSG_RESULT([no])
+ compat_futex_test=1
+]
+)
+
+AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ])
+
+AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ])
+
+[
+if test "x$SUBARCHTYPE" = xx86compat; then
+]
+ AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
+[
+fi
+]
-AM_CONDITIONAL([GCC_API], [test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc])
+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_RCU_SMP], [1])
+[
+ echo "SMP support enabled."
+fi
+]
+
+# From the sched_setaffinity(2)'s man page:
+# ~~~~
+# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
+# The library interfaces were introduced in glibc 2.3. Initially, the
+# glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
+# the cpuset size argument was removed, but this argument was
+# restored in glibc 2.3.4.
+# ~~~~
+
+# In addition to that, some vendors ported the system call to 2.4
+# kernels.
+
+# Furthermore, when the function first appeared, the MASK argument was
+# an unsigned long pointer, while later it was made into a cpu_set_t
+# pointer. Systems that have the cpu_set_t version also should have
+# the CPU_ZERO, CPU_SET, etc. macros.
+
+# All this mess means we have to cater for at least 3 different
+# sched_setaffinity prototypes:
+
+# ~~~~
+# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
+# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
+# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
+# ~~~~
+dnl Since we define _GNU_SOURCE in the sources, must do so too in the
+dnl autoconf tests, as defining _GNU_SOURCE or not exposes
+dnl sched_setaffinity bits differently.
+saved_CFLAGS=$CFLAGS
+CFLAGS="$CFLAGS -D_GNU_SOURCE"
+
+# First check if the function is available at all.
+AC_CHECK_FUNCS(
+ [sched_setaffinity],
+ [ # Okay, we have it. Check if also have cpu_set_t. If we don't,
+ # then we have the first version using unsigned long, and no
+ # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
+ # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
+ # should also be present, but we confirm nonetheless.
+
+ AC_CHECK_TYPES(
+ [cpu_set_t],
+ [ # We do have it. Confirm that we have CPU_ZERO, and it actually works.
+ AC_MSG_CHECKING([whether CPU_ZERO works])
+ AH_TEMPLATE([HAVE_CPU_ZERO],
+ [Define to 1 if we have CPU_ZERO and if it works])
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [#define _GNU_SOURCE
+ #include <sched.h>],
+ [cpu_set_t foo; CPU_ZERO (&foo);])
+ ],
+ [ # Works!
+ AC_DEFINE(HAVE_CPU_ZERO, 1)
+ AC_MSG_RESULT([yes])
+ ],
+ [AC_MSG_RESULT([no])]
+ )
+
+ # Check how many arguments does sched_setaffinity take.
+ # Should be 3 or 2.
+ AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [#include <sched.h>],
+ [cpu_set_t foo; sched_setaffinity (0, sizeof (foo), &foo);])
+ ],
+ [sched_set_affinity_args=3],
+ [sched_set_affinity_args=2])
+ AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args,
+ [Define to sched_setaffinity's number of arguments.])
+ AC_MSG_RESULT([$sched_set_affinity_args])
+ ],
+ [ # No cpu_set_t, always 3 args.
+ AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) ],
+ [#include <sched.h>]
+ )
+ ]
+)
+
+CFLAGS=$saved_CFLAGS
+
+AC_CONFIG_LINKS([
+ urcu/arch.h:$ARCHSRC
+ urcu/uatomic_arch.h:$UATOMICSRC
+ tests/api.h:$APISRC
+])
AC_CONFIG_FILES([
Makefile
tests/Makefile
projects / urcu.git / blobdiff