uatomic: update atomic set/read, use STORE_SHARED/LOAD_SHARED
[urcu.git] / configure.ac
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1# -*- Autoconf -*-
2# Process this file with autoconf to produce a configure script.
3
4
0540b338 5AC_INIT([userspace-rcu], [0.2.3], [mathieu dot desnoyers at polymtl dot ca])
48d848c7 6AC_CONFIG_AUX_DIR([config])
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7AC_CANONICAL_TARGET
8AC_CANONICAL_HOST
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9AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
10AC_CONFIG_SRCDIR([urcu.h])
0f4ac97f 11AM_PROG_MKDIR_P
7d413817 12
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13AC_CONFIG_HEADERS([config.h urcu/config.h])
14
15# Keep at the end to do not pollute installed header.
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16AH_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.])
17AH_TEMPLATE([CONFIG_URCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
18AH_TEMPLATE([CONFIG_URCU_HAVE_FUTEX], [Defined when on a system with futex support.])
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19
20# Checks for programs.
21AC_PROG_CC
22AC_PROG_MAKE_SET
23AC_PROG_LIBTOOL
24
25# Checks for typedefs, structures, and compiler characteristics.
26AC_C_INLINE
27AC_TYPE_PID_T
28AC_TYPE_SIZE_T
29
30# Checks for library functions.
31AC_FUNC_MALLOC
32AC_FUNC_MMAP
33AC_CHECK_FUNCS([bzero gettimeofday munmap strtoul])
34
35# Find arch type
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36case $target_cpu in
37 i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
38 i486) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
39 i586) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
40 i686) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
48d848c7 41 x86_64) ARCHTYPE="x86";;
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42 powerpc) ARCHTYPE="ppc" ;;
43 ppc64) ARCHTYPE="ppc" ;;
7d413817 44 powerpc64) ARCHTYPE="ppc" ;;
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45 ppc) ARCHTYPE="ppc" ;;
46 s390) ARCHTYPE="s390" ;;
47 s390x) ARCHTYPE="s390" ;;
48 *) ARCHTYPE="unknown";;
49esac
50
51if test "$ARCHTYPE" = "unknown"; then
52 AC_MSG_ERROR([Unable to detect the architecture.])
53fi
54AC_SUBST(ARCHTYPE)
7d413817 55AC_SUBST(SUBARCHTYPE)
48d848c7 56
90586875 57[
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58#if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586"; then
59#For now, using lock; addl compatibility mode even for i686, because the
60#Pentium III is seen as a i686, but lacks mfence instruction.
61#Only using fence for x86_64.
62if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586" -a "x$target_cpu" != "xi686"; then
90586875 63]
49617de1 64 AC_DEFINE([CONFIG_URCU_HAVE_FENCE], [1])
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65[
66fi
67]
68
49617de1 69AC_MSG_CHECKING([sys_futex()])
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70AC_TRY_COMPILE(
71[
72#include <sys/syscall.h>
73],
74[
75#ifndef __NR_futex
76#error "futexes not available"
77#endif
78],
79[
80 AC_MSG_RESULT([yes])
49617de1 81 AC_DEFINE([CONFIG_URCU_HAVE_FUTEX], [1])
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82 compat_futex_test=0
83]
84,
85[
86 AC_MSG_RESULT([no])
87 compat_futex_test=1
88]
89)
90
91AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ])
92
40646e1e 93AM_CONDITIONAL([GCC_API], [test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc])
48d848c7 94
0854ccff 95AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ])
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96
97AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this
98 on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"])
99
100[
101if test "$def_smp_support" = "no"; then
102 echo "SMP support disabled."
103else
104]
49617de1 105 AC_DEFINE([CONFIG_URCU_SMP], [1])
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106[
107 echo "SMP support enabled."
108fi
109]
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110
111AC_CONFIG_FILES([
112 Makefile
113 tests/Makefile
114])
115AC_OUTPUT
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