uatomic compat: complete i386 support
[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 AH_TEMPLATE([CONFIG_URCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks
20 cmpxchg instruction.])
21
22 # Checks for programs.
23 AC_PROG_CC
24 AC_PROG_MAKE_SET
25 AC_PROG_LIBTOOL
26
27 # Checks for typedefs, structures, and compiler characteristics.
28 AC_C_INLINE
29 AC_TYPE_PID_T
30 AC_TYPE_SIZE_T
31
32 # Checks for library functions.
33 AC_FUNC_MALLOC
34 AC_FUNC_MMAP
35 AC_CHECK_FUNCS([bzero gettimeofday munmap strtoul])
36
37 # Find arch type
38 case $target_cpu in
39 i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
40 i486) ARCHTYPE="x86";;
41 i586) ARCHTYPE="x86";;
42 i686) ARCHTYPE="x86";;
43 x86_64) ARCHTYPE="x86";;
44 powerpc) ARCHTYPE="ppc" ;;
45 ppc64) ARCHTYPE="ppc" ;;
46 powerpc64) ARCHTYPE="ppc" ;;
47 ppc) ARCHTYPE="ppc" ;;
48 s390) ARCHTYPE="s390" ;;
49 s390x) ARCHTYPE="s390" ;;
50 *) ARCHTYPE="unknown";;
51 esac
52
53 if test "$ARCHTYPE" = "unknown"; then
54 AC_MSG_ERROR([Unable to detect the architecture.])
55 fi
56 AC_SUBST(ARCHTYPE)
57 AC_SUBST(SUBARCHTYPE)
58
59 [
60 #if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586"; then
61 #For now, using lock; addl compatibility mode even for i686, because the
62 #Pentium III is seen as a i686, but lacks mfence instruction.
63 #Only using fence for x86_64.
64 if test "x$ARCHTYPE" = "xx86" -a "x$target_cpu" != "xi386" -a "x$target_cpu" != "xi486" -a "x$target_cpu" != "xi586" -a "x$target_cpu" != "xi686"; then
65 ]
66 AC_DEFINE([CONFIG_URCU_HAVE_FENCE], [1])
67 [
68 fi
69 ]
70
71 AC_MSG_CHECKING([sys_futex()])
72 AC_TRY_COMPILE(
73 [
74 #include <sys/syscall.h>
75 ],
76 [
77 #ifndef __NR_futex
78 #error "futexes not available"
79 #endif
80 ],
81 [
82 AC_MSG_RESULT([yes])
83 AC_DEFINE([CONFIG_URCU_HAVE_FUTEX], [1])
84 compat_futex_test=0
85 ]
86 ,
87 [
88 AC_MSG_RESULT([no])
89 compat_futex_test=1
90 ]
91 )
92
93 AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ])
94
95 AM_CONDITIONAL([GCC_API], [test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc])
96
97 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ])
98
99 [
100 if test "x$SUBARCHTYPE" = xx86compat; then
101 ]
102 AC_DEFINE([CONFIG_URCU_COMPAT_ARCH], [1])
103 [
104 fi
105 ]
106
107 AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this
108 on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"])
109
110 [
111 if test "$def_smp_support" = "no"; then
112 echo "SMP support disabled."
113 else
114 ]
115 AC_DEFINE([CONFIG_URCU_SMP], [1])
116 [
117 echo "SMP support enabled."
118 fi
119 ]
120
121 AC_CONFIG_FILES([
122 Makefile
123 tests/Makefile
124 ])
125 AC_OUTPUT
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