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