Configure: Add missing checks
[urcu.git] / configure.ac
CommitLineData
074c3a1b
MJ
1AC_PREREQ(2.59)
2AC_INIT([userspace-rcu],[0.8.0],[mathieu dot desnoyers at efficios dot com], [], [http://liburcu.org/])
98bc124a
YB
3
4# Following the numbering scheme proposed by libtool for the library version
5# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
45e60038 6AC_SUBST([URCU_LIBRARY_VERSION], [3:0:0])
98bc124a 7
074c3a1b
MJ
8AC_CONFIG_SRCDIR([urcu.h])
9AC_CONFIG_HEADERS([config.h urcu/config.h])
48d848c7 10AC_CONFIG_AUX_DIR([config])
074c3a1b
MJ
11AC_CONFIG_MACRO_DIR([m4])
12
7d413817
MD
13AC_CANONICAL_TARGET
14AC_CANONICAL_HOST
074c3a1b 15
48d848c7 16AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
35eb2d6c 17AM_MAINTAINER_MODE([enable])
7d413817 18
074c3a1b
MJ
19# Enable silent rules if available (Introduced in AM 1.11)
20m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
e72596d1 21
02be5561
MD
22AH_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.])
23AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
24AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
a6412536
AM
25AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
26AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
a767fdc3
MD
27AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
28
75478b32
MD
29# Allow overriding storage used for TLS variables.
30AC_ARG_ENABLE([compiler-tls],
31 AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
32 [def_compiler_tls=$enableval],
33 [def_compiler_tls="yes"])
34
35# If not overridden, use ax_tls.m4 to check if TLS is available.
36AS_IF([test "x$def_compiler_tls" = "xyes"],
37 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
38 [:])
39
40AS_IF([test "x$def_tls_detect" = "x"],
41 [:],
42 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
48d848c7 43
074c3a1b
MJ
44# Checks for C compiler
45AC_USE_SYSTEM_EXTENSIONS
48d848c7 46AC_PROG_CC
074c3a1b
MJ
47AC_PROG_CC_STDC
48
49# Checks for programs.
27d5e306 50AC_PROG_AWK
48d848c7 51AC_PROG_MAKE_SET
074c3a1b 52AC_CHECK_PROGS(NPROC, [nproc gnproc])
b14a378a 53LT_INIT
48d848c7
PMF
54
55# Checks for typedefs, structures, and compiler characteristics.
56AC_C_INLINE
57AC_TYPE_PID_T
58AC_TYPE_SIZE_T
27d5e306
MJ
59AC_TYPE_SSIZE_T
60AC_TYPE_UINT16_T
991d28ca
JR
61AC_TYPE_INT32_T
62AC_TYPE_UINT32_T
63AC_TYPE_UINT64_T
64AC_TYPE_UINT8_T
48d848c7 65
074c3a1b
MJ
66AX_C___ATTRIBUTE__
67AS_IF([test "x$ax_cv___attribute__" = "xyes"],
68 [:],
69 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
70
71AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
72LIBS="$PTHREAD_LIBS $LIBS"
73CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
74CC="$PTHREAD_CC"
75
48d848c7
PMF
76# Checks for library functions.
77AC_FUNC_MALLOC
78AC_FUNC_MMAP
27d5e306
MJ
79AC_FUNC_FORK
80AC_CHECK_FUNCS([ \
81 atexit \
82 clock_gettime \
83 getcpuid \
84 gettid \
85 gettimeofday \
86 memeset \
87 memset \
88 munmap \
89 sched_getcpu \
90 strerror \
91 strtoul \
92 sysconf \
93])
48d848c7 94
bb6afa9a 95# Check for headers
27d5e306
MJ
96AC_CHECK_HEADER_STDBOOL
97AC_CHECK_HEADERS([ \
98 limits.h \
99 stddef.h \
100 sys/param.h \
101 sys/time.h \
102])
bb6afa9a 103
48d848c7 104# Find arch type
58e9f838 105AS_CASE([$host_cpu],
a6412536
AM
106 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
107 [i486], [ARCHTYPE="x86"],
108 [i586], [ARCHTYPE="x86"],
109 [i686], [ARCHTYPE="x86"],
110 [amd64], [ARCHTYPE="x86"],
111 [x86_64], [ARCHTYPE="x86"],
112 [powerpc], [ARCHTYPE="ppc"],
113 [ppc64], [ARCHTYPE="ppc"],
114 [powerpc64], [ARCHTYPE="ppc"],
61126bd9 115 [powerpc64le], [ARCHTYPE="ppc"],
a6412536
AM
116 [ppc], [ARCHTYPE="ppc"],
117 [s390], [ARCHTYPE="s390"],
118 [s390x], [ARCHTYPE="s390"],
171ff3a3 119 [sparc], [ARCHTYPE="sparc64"],
a6412536
AM
120 [sparc64], [ARCHTYPE="sparc64"],
121 [alpha*], [ARCHTYPE="alpha"],
c21a8d01 122 [ia64], [ARCHTYPE="ia64"],
a6412536 123 [arm*], [ARCHTYPE="arm"],
3aea2ae0 124 [aarch64], [ARCHTYPE="aarch64"],
e1259cb1 125 [mips*], [ARCHTYPE="mips"],
c23069c6 126 [tile*], [ARCHTYPE="tile"],
13e0bc72 127 [hppa*], [ARCHTYPE="hppa"],
a6412536
AM
128 [ARCHTYPE="unknown"]
129)
91b0650a 130
de41725c
CB
131AS_CASE([$host],[*-*-linux-androideabi],
132 [AM_CONDITIONAL(TARGET_IS_ANDROID, true)],
133 [AM_CONDITIONAL(TARGET_IS_ANDROID, false)]
134)
135
a6412536
AM
136AC_SUBST(ARCHTYPE)
137AC_SUBST(SUBARCHTYPE)
5e626e0e 138
a2e7bf9c 139UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
1b9119f8 140ARCHSRC=urcu/arch/$ARCHTYPE.h
455b809a 141
a6412536
AM
142AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
143 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
144])
145
58e9f838 146AS_IF([test "$host_cpu" = "armv7l"],[
a6412536
AM
147 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
148])
48d848c7 149
a6412536
AM
150# ARM-specific checks
151AS_IF([test "x$ARCHTYPE" = "xarm"],[
152 AC_MSG_CHECKING([for dmb instruction])
fe0707ab
MD
153 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
154 int main()
155 {
156 asm volatile("dmb":::"memory");
157 return 0;
158 }
159 ]])
160 ],[
a6412536
AM
161 AC_MSG_RESULT([yes])
162 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
163 ],[
164 AC_MSG_RESULT([no])
165 ])
166])
167
274773cf
SM
168# Tile-specific checks
169AS_IF([echo "$host_cpu" | grep "^tile"],[
170 AC_MSG_CHECKING([for Tile architecture type])
171 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
172 #ifndef __tilegx__
173 #error
174 #endif
175 ]])
176 ],[
177 AC_MSG_RESULT([ok])
178 ],[
179 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
180 ])
181])
182
a6412536
AM
183# x86-specific checks
184AS_IF([test "x$ARCHTYPE" = "xx86"],[
185 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
186 #For now, using lock; addl compatibility mode even for i686, because the
187 #Pentium III is seen as a i686, but lacks mfence instruction.
188 #Only using fence for x86_64.
8496c886
SM
189 #
190 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
191 #variant but lacks fence instructions.
192 AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om"],[
a6412536
AM
193 AC_MSG_RESULT([yes])
194 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
195 ],[
196 AC_MSG_RESULT([no])
197 ])
198])
199
200# Check if sys_futex() is available
201AC_MSG_CHECKING([for sys_futex()])
fe0707ab 202AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 203 #include <sys/syscall.h>
a6412536
AM
204 #ifndef __NR_futex
205 #error "futexes not available"
206 #endif
fe0707ab 207 ]])
a6412536 208],[
0854ccff 209 AC_MSG_RESULT([yes])
02be5561 210 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
0854ccff 211 compat_futex_test=0
91b0650a 212],[
0854ccff
MD
213 AC_MSG_RESULT([no])
214 compat_futex_test=1
91b0650a 215])
0854ccff 216
0e1efa0e
CB
217# Check for pthread
218AC_CHECK_LIB([pthread], [pthread_create],
219 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
220 [AC_CHECK_LIB([c], [pthread_create],
221 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
222 [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its location.])]
223 )]
224)
225
a6412536
AM
226AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
227AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
2f49a496 228AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
0854ccff 229
a6412536
AM
230# smp-support configure option
231AC_ARG_ENABLE([smp-support],
232 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
233 [def_smp_support=$enableval],
234 [def_smp_support="yes"])
235AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
7d413817 236
48d848c7 237
d8540fc5
PA
238# From the sched_setaffinity(2)'s man page:
239# ~~~~
240# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
241# The library interfaces were introduced in glibc 2.3. Initially, the
242# glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
243# the cpuset size argument was removed, but this argument was
244# restored in glibc 2.3.4.
245# ~~~~
246
247# In addition to that, some vendors ported the system call to 2.4
248# kernels.
249
250# Furthermore, when the function first appeared, the MASK argument was
251# an unsigned long pointer, while later it was made into a cpu_set_t
252# pointer. Systems that have the cpu_set_t version also should have
253# the CPU_ZERO, CPU_SET, etc. macros.
254
255# All this mess means we have to cater for at least 3 different
256# sched_setaffinity prototypes:
257
258# ~~~~
259# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
260# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
261# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
262# ~~~~
263
a6412536
AM
264# Since we define _GNU_SOURCE in the sources, must do so too in the
265# autoconf tests, as defining _GNU_SOURCE or not exposes
266# sched_setaffinity bits differently.
d8540fc5
PA
267saved_CFLAGS=$CFLAGS
268CFLAGS="$CFLAGS -D_GNU_SOURCE"
269
b3231c17
MD
270AC_CHECK_TYPES([cpu_set_t],
271 [have_cpu_set_t="yes"],
272 [have_cpu_set_t="no"],
273 [#include <sched.h>])
274
275# Confirm that we have CPU_ZERO, and it actually works.
276AC_MSG_CHECKING([whether CPU_ZERO works])
277AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
278AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
279 #define _GNU_SOURCE
280 #include <sched.h>
281 int main()
282 {
283 cpu_set_t foo; CPU_ZERO(&foo);
284 return 0;
285 }
286 ]])
287],[
288 AC_DEFINE(HAVE_CPU_ZERO, 1)
289 AC_MSG_RESULT([yes])
290],[
291 AC_MSG_RESULT([no])
292])
293
294# Confirm that we have CPU_SET, and it actually works.
295AC_MSG_CHECKING([whether CPU_SET works])
296AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
297AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
298 #define _GNU_SOURCE
299 #include <sched.h>
300 int main()
301 {
302 cpu_set_t foo, mask; CPU_SET(0, &foo);
303 return 0;
304 }
305 ]])
306],[
307 AC_DEFINE(HAVE_CPU_SET, 1)
308 AC_MSG_RESULT([yes])
309],[
310 AC_MSG_RESULT([no])
311])
312
d8540fc5 313# First check if the function is available at all.
a6412536
AM
314AC_CHECK_FUNCS([sched_setaffinity],[
315 # Okay, we have it. Check if also have cpu_set_t. If we don't,
316 # then we have the first version using unsigned long, and no
317 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
318 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
319 # should also be present, but we confirm nonetheless.
320
b3231c17
MD
321 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
322 # We do have it.
a6412536
AM
323 # Check how many arguments does sched_setaffinity take.
324 # Should be 3 or 2.
325 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
ec5e2d14 326 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 327 #include <sched.h>
fe0707ab
MD
328 int main()
329 {
330 cpu_set_t foo;
b3231c17 331 sched_setaffinity(0, sizeof (foo), &foo);
fe0707ab
MD
332 return 0;
333 }
a6412536
AM
334 ]])
335 ],
336 [sched_set_affinity_args=3],
337 [sched_set_affinity_args=2])
b3231c17
MD
338 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
339 $sched_set_affinity_args,
a6412536
AM
340 [Defined to sched_setaffinity's number of arguments.])
341 AC_MSG_RESULT([$sched_set_affinity_args])
342 ],[
343 # No cpu_set_t, always 3 args.
344 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
b3231c17 345 ])
a6412536 346])
d8540fc5
PA
347
348CFLAGS=$saved_CFLAGS
349
455b809a
PB
350AC_CONFIG_LINKS([
351 urcu/arch.h:$ARCHSRC
a2e7bf9c 352 urcu/uatomic.h:$UATOMICSRC
455b809a 353])
48d848c7
PMF
354AC_CONFIG_FILES([
355 Makefile
fe999c05 356 doc/Makefile
8bad63a0 357 doc/examples/Makefile
48d848c7 358 tests/Makefile
f5ab766e
MD
359 tests/common/Makefile
360 tests/unit/Makefile
361 tests/benchmark/Makefile
362 tests/regression/Makefile
074c3a1b 363 tests/regression/regression_tests
1b387491 364 tests/utils/Makefile
2260a36c
YB
365 liburcu.pc
366 liburcu-bp.pc
a6412536 367 liburcu-cds.pc
2260a36c
YB
368 liburcu-qsbr.pc
369 liburcu-mb.pc
370 liburcu-signal.pc
48d848c7
PMF
371])
372AC_OUTPUT
a6412536
AM
373
374# Report on selected configure options
375AS_IF([test "x$def_smp_support" = "xyes"],[
376 AS_ECHO("SMP support enabled.")
377],[
378 AS_ECHO("SMP support disabled.")
379])
75478b32
MD
380
381AS_IF([test "x$def_tls_detect" = "x"],[
382 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
383],[
384 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
385])
This page took 0.076436 seconds and 4 git commands to generate.