Fix build for amd64 environment (for FreeBSD 8.2)
[urcu.git] / configure.ac
CommitLineData
48d848c7
PMF
1# -*- Autoconf -*-
2# Process this file with autoconf to produce a configure script.
3
4
530aab93 5AC_INIT([userspace-rcu], [0.6.6], [mathieu dot desnoyers at efficios dot com])
98bc124a
YB
6
7# Following the numbering scheme proposed by libtool for the library version
8# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
9AC_SUBST([URCU_LIBRARY_VERSION], [1:0:0])
10
48d848c7 11AC_CONFIG_AUX_DIR([config])
7d413817
MD
12AC_CANONICAL_TARGET
13AC_CANONICAL_HOST
48d848c7 14AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
806f8114
PB
15m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
16
48d848c7 17AC_CONFIG_SRCDIR([urcu.h])
0f4ac97f 18AM_PROG_MKDIR_P
7d413817 19
e72596d1
MD
20AC_CONFIG_HEADERS([config.h urcu/config.h])
21
22# Keep at the end to do not pollute installed header.
02be5561
MD
23AH_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.])
24AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
25AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
26AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks
bf9de1b7 27cmpxchg instruction.])
e95ee429 28AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction is available for use on ARM.])
48d848c7
PMF
29
30# Checks for programs.
31AC_PROG_CC
32AC_PROG_MAKE_SET
33AC_PROG_LIBTOOL
34
35# Checks for typedefs, structures, and compiler characteristics.
36AC_C_INLINE
37AC_TYPE_PID_T
38AC_TYPE_SIZE_T
39
40# Checks for library functions.
41AC_FUNC_MALLOC
42AC_FUNC_MMAP
b57aee66 43AC_CHECK_FUNCS([bzero gettimeofday munmap sched_getcpu strtoul sysconf])
48d848c7
PMF
44
45# Find arch type
c5b9f8ff 46case $host_cpu in
7d413817 47 i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;;
bf9de1b7
MD
48 i486) ARCHTYPE="x86";;
49 i586) ARCHTYPE="x86";;
50 i686) ARCHTYPE="x86";;
2c612a55 51 amd64) ARCHTYPE="x86";;
48d848c7 52 x86_64) ARCHTYPE="x86";;
48d848c7
PMF
53 powerpc) ARCHTYPE="ppc" ;;
54 ppc64) ARCHTYPE="ppc" ;;
7d413817 55 powerpc64) ARCHTYPE="ppc" ;;
48d848c7
PMF
56 ppc) ARCHTYPE="ppc" ;;
57 s390) ARCHTYPE="s390" ;;
58 s390x) ARCHTYPE="s390" ;;
c0a68bfa 59 sparc64) ARCHTYPE="sparc64" ;;
6f9d9b49 60 alpha*) ARCHTYPE="alpha" ;;
ca5a03db 61 ia64) ARCHTYPE="gcc" ;;
93af08d9 62 arm*) ARCHTYPE="arm" ;;
48d848c7
PMF
63 *) ARCHTYPE="unknown";;
64esac
65
5e626e0e
JW
66if test "x$ARCHTYPE" = "xarm" ; then
67AC_MSG_CHECKING([checking for dmb instruction])
68AC_TRY_COMPILE(
69[
70],
71[
72asm volatile("dmb":::"memory");
73],
74[
75 AC_MSG_RESULT([yes])
e95ee429 76 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
5e626e0e
JW
77]
78,
79[
80 AC_MSG_RESULT([no])
81]
82)
83fi
84
a2e7bf9c 85UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
1b9119f8 86ARCHSRC=urcu/arch/$ARCHTYPE.h
fdbddd0b
PM
87if test "$ARCHTYPE" == "armv7l"; then
88 CFLAGS="-mcpu=cortex-a9 -mtune=cortex-a9 -O"
89fi
455b809a 90
48d848c7 91AC_SUBST(ARCHTYPE)
7d413817 92AC_SUBST(SUBARCHTYPE)
48d848c7 93
90586875 94[
c5b9f8ff 95#if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586"; then
6cb4ed53
MD
96#For now, using lock; addl compatibility mode even for i686, because the
97#Pentium III is seen as a i686, but lacks mfence instruction.
98#Only using fence for x86_64.
c5b9f8ff 99if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"; then
90586875 100]
02be5561 101 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
90586875
MD
102[
103fi
104]
105
49617de1 106AC_MSG_CHECKING([sys_futex()])
0854ccff
MD
107AC_TRY_COMPILE(
108[
109#include <sys/syscall.h>
110],
111[
112#ifndef __NR_futex
113#error "futexes not available"
114#endif
115],
116[
117 AC_MSG_RESULT([yes])
02be5561 118 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
0854ccff
MD
119 compat_futex_test=0
120]
121,
122[
123 AC_MSG_RESULT([no])
124 compat_futex_test=1
125]
126)
127
128AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ])
129
0854ccff 130AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ])
7d413817 131
bf9de1b7
MD
132[
133if test "x$SUBARCHTYPE" = xx86compat; then
134]
02be5561 135 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
bf9de1b7
MD
136[
137fi
138]
139
7d413817
MD
140AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this
141 on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"])
142
143[
144if test "$def_smp_support" = "no"; then
145 echo "SMP support disabled."
146else
147]
02be5561 148 AC_DEFINE([CONFIG_RCU_SMP], [1])
7d413817
MD
149[
150 echo "SMP support enabled."
151fi
152]
48d848c7 153
d8540fc5
PA
154# From the sched_setaffinity(2)'s man page:
155# ~~~~
156# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
157# The library interfaces were introduced in glibc 2.3. Initially, the
158# glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
159# the cpuset size argument was removed, but this argument was
160# restored in glibc 2.3.4.
161# ~~~~
162
163# In addition to that, some vendors ported the system call to 2.4
164# kernels.
165
166# Furthermore, when the function first appeared, the MASK argument was
167# an unsigned long pointer, while later it was made into a cpu_set_t
168# pointer. Systems that have the cpu_set_t version also should have
169# the CPU_ZERO, CPU_SET, etc. macros.
170
171# All this mess means we have to cater for at least 3 different
172# sched_setaffinity prototypes:
173
174# ~~~~
175# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
176# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
177# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
178# ~~~~
179
180dnl Since we define _GNU_SOURCE in the sources, must do so too in the
181dnl autoconf tests, as defining _GNU_SOURCE or not exposes
182dnl sched_setaffinity bits differently.
183saved_CFLAGS=$CFLAGS
184CFLAGS="$CFLAGS -D_GNU_SOURCE"
185
186# First check if the function is available at all.
187AC_CHECK_FUNCS(
188 [sched_setaffinity],
189 [ # Okay, we have it. Check if also have cpu_set_t. If we don't,
190 # then we have the first version using unsigned long, and no
191 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
192 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
193 # should also be present, but we confirm nonetheless.
194
195 AC_CHECK_TYPES(
196 [cpu_set_t],
197 [ # We do have it. Confirm that we have CPU_ZERO, and it actually works.
198 AC_MSG_CHECKING([whether CPU_ZERO works])
199 AH_TEMPLATE([HAVE_CPU_ZERO],
200 [Define to 1 if we have CPU_ZERO and if it works])
201 AC_COMPILE_IFELSE(
202 [AC_LANG_PROGRAM(
203 [#define _GNU_SOURCE
204 #include <sched.h>],
205 [cpu_set_t foo; CPU_ZERO (&foo);])
206 ],
207 [ # Works!
208 AC_DEFINE(HAVE_CPU_ZERO, 1)
209 AC_MSG_RESULT([yes])
210 ],
211 [AC_MSG_RESULT([no])]
212 )
213
214 # Check how many arguments does sched_setaffinity take.
215 # Should be 3 or 2.
216 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
217 AC_COMPILE_IFELSE(
218 [AC_LANG_PROGRAM(
219 [#include <sched.h>],
220 [cpu_set_t foo; sched_setaffinity (0, sizeof (foo), &foo);])
221 ],
222 [sched_set_affinity_args=3],
223 [sched_set_affinity_args=2])
224 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args,
225 [Define to sched_setaffinity's number of arguments.])
226 AC_MSG_RESULT([$sched_set_affinity_args])
227 ],
228 [ # No cpu_set_t, always 3 args.
229 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) ],
230 [#include <sched.h>]
231 )
232 ]
233)
234
235CFLAGS=$saved_CFLAGS
236
455b809a
PB
237AC_CONFIG_LINKS([
238 urcu/arch.h:$ARCHSRC
a2e7bf9c 239 urcu/uatomic.h:$UATOMICSRC
455b809a 240])
48d848c7
PMF
241AC_CONFIG_FILES([
242 Makefile
243 tests/Makefile
fe670822 244 liburcu-cds.pc
2260a36c
YB
245 liburcu.pc
246 liburcu-bp.pc
247 liburcu-qsbr.pc
248 liburcu-mb.pc
249 liburcu-signal.pc
48d848c7
PMF
250])
251AC_OUTPUT
This page took 0.049928 seconds and 4 git commands to generate.