Update gitignore
[urcu.git] / configure.ac
CommitLineData
48d848c7
PMF
1# -*- Autoconf -*-
2# Process this file with autoconf to produce a configure script.
3
4
c2f15ecd 5AC_INIT([userspace-rcu],[0.6.7],[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
b14a378a 33LT_INIT
48d848c7
PMF
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])
91b0650a
MD
68AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
69]], [[
5e626e0e 70asm volatile("dmb":::"memory");
91b0650a 71]])],[
5e626e0e 72 AC_MSG_RESULT([yes])
e95ee429 73 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
91b0650a
MD
74
75],[
5e626e0e 76 AC_MSG_RESULT([no])
91b0650a
MD
77
78])
5e626e0e
JW
79fi
80
a2e7bf9c 81UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
1b9119f8 82ARCHSRC=urcu/arch/$ARCHTYPE.h
fdbddd0b
PM
83if test "$ARCHTYPE" == "armv7l"; then
84 CFLAGS="-mcpu=cortex-a9 -mtune=cortex-a9 -O"
85fi
455b809a 86
48d848c7 87AC_SUBST(ARCHTYPE)
7d413817 88AC_SUBST(SUBARCHTYPE)
48d848c7 89
90586875 90[
c5b9f8ff 91#if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586"; then
6cb4ed53
MD
92#For now, using lock; addl compatibility mode even for i686, because the
93#Pentium III is seen as a i686, but lacks mfence instruction.
94#Only using fence for x86_64.
c5b9f8ff 95if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"; then
90586875 96]
02be5561 97 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
90586875
MD
98[
99fi
100]
101
49617de1 102AC_MSG_CHECKING([sys_futex()])
91b0650a 103AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
0854ccff 104#include <sys/syscall.h>
91b0650a 105]], [[
0854ccff
MD
106#ifndef __NR_futex
107#error "futexes not available"
108#endif
91b0650a 109]])],[
0854ccff 110 AC_MSG_RESULT([yes])
02be5561 111 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
0854ccff 112 compat_futex_test=0
91b0650a
MD
113
114],[
0854ccff
MD
115 AC_MSG_RESULT([no])
116 compat_futex_test=1
91b0650a
MD
117
118])
0854ccff
MD
119
120AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ])
121
0854ccff 122AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ])
7d413817 123
bf9de1b7
MD
124[
125if test "x$SUBARCHTYPE" = xx86compat; then
126]
02be5561 127 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
bf9de1b7
MD
128[
129fi
130]
131
7d413817
MD
132AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this
133 on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"])
134
135[
136if test "$def_smp_support" = "no"; then
137 echo "SMP support disabled."
138else
139]
02be5561 140 AC_DEFINE([CONFIG_RCU_SMP], [1])
7d413817
MD
141[
142 echo "SMP support enabled."
143fi
144]
48d848c7 145
d8540fc5
PA
146# From the sched_setaffinity(2)'s man page:
147# ~~~~
148# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
149# The library interfaces were introduced in glibc 2.3. Initially, the
150# glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
151# the cpuset size argument was removed, but this argument was
152# restored in glibc 2.3.4.
153# ~~~~
154
155# In addition to that, some vendors ported the system call to 2.4
156# kernels.
157
158# Furthermore, when the function first appeared, the MASK argument was
159# an unsigned long pointer, while later it was made into a cpu_set_t
160# pointer. Systems that have the cpu_set_t version also should have
161# the CPU_ZERO, CPU_SET, etc. macros.
162
163# All this mess means we have to cater for at least 3 different
164# sched_setaffinity prototypes:
165
166# ~~~~
167# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
168# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
169# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
170# ~~~~
171
172dnl Since we define _GNU_SOURCE in the sources, must do so too in the
173dnl autoconf tests, as defining _GNU_SOURCE or not exposes
174dnl sched_setaffinity bits differently.
175saved_CFLAGS=$CFLAGS
176CFLAGS="$CFLAGS -D_GNU_SOURCE"
177
178# First check if the function is available at all.
179AC_CHECK_FUNCS(
180 [sched_setaffinity],
181 [ # Okay, we have it. Check if also have cpu_set_t. If we don't,
182 # then we have the first version using unsigned long, and no
183 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
184 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
185 # should also be present, but we confirm nonetheless.
186
187 AC_CHECK_TYPES(
188 [cpu_set_t],
189 [ # We do have it. Confirm that we have CPU_ZERO, and it actually works.
190 AC_MSG_CHECKING([whether CPU_ZERO works])
191 AH_TEMPLATE([HAVE_CPU_ZERO],
192 [Define to 1 if we have CPU_ZERO and if it works])
193 AC_COMPILE_IFELSE(
194 [AC_LANG_PROGRAM(
195 [#define _GNU_SOURCE
196 #include <sched.h>],
197 [cpu_set_t foo; CPU_ZERO (&foo);])
198 ],
199 [ # Works!
200 AC_DEFINE(HAVE_CPU_ZERO, 1)
201 AC_MSG_RESULT([yes])
202 ],
203 [AC_MSG_RESULT([no])]
204 )
205
206 # Check how many arguments does sched_setaffinity take.
207 # Should be 3 or 2.
208 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
209 AC_COMPILE_IFELSE(
210 [AC_LANG_PROGRAM(
211 [#include <sched.h>],
212 [cpu_set_t foo; sched_setaffinity (0, sizeof (foo), &foo);])
213 ],
214 [sched_set_affinity_args=3],
215 [sched_set_affinity_args=2])
216 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args,
217 [Define to sched_setaffinity's number of arguments.])
218 AC_MSG_RESULT([$sched_set_affinity_args])
219 ],
220 [ # No cpu_set_t, always 3 args.
221 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) ],
222 [#include <sched.h>]
223 )
224 ]
225)
226
227CFLAGS=$saved_CFLAGS
228
455b809a
PB
229AC_CONFIG_LINKS([
230 urcu/arch.h:$ARCHSRC
a2e7bf9c 231 urcu/uatomic.h:$UATOMICSRC
455b809a 232])
48d848c7
PMF
233AC_CONFIG_FILES([
234 Makefile
235 tests/Makefile
fe670822 236 liburcu-cds.pc
2260a36c
YB
237 liburcu.pc
238 liburcu-bp.pc
239 liburcu-qsbr.pc
240 liburcu-mb.pc
241 liburcu-signal.pc
48d848c7
PMF
242])
243AC_OUTPUT
This page took 0.051639 seconds and 4 git commands to generate.