Fix: use clock_get_time for caa_get_cycles fallback on MacOSX
[urcu.git] / configure.ac
1 AC_PREREQ(2.59)
2 AC_INIT([userspace-rcu],[0.9.0],[mathieu dot desnoyers at efficios dot com], [], [http://liburcu.org/])
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
6 AC_SUBST([URCU_LIBRARY_VERSION], [4:0:0])
7
8 AC_CONFIG_SRCDIR([urcu.h])
9 AC_CONFIG_HEADERS([config.h urcu/config.h])
10 AC_CONFIG_AUX_DIR([config])
11 AC_CONFIG_MACRO_DIR([m4])
12
13 AC_CANONICAL_TARGET
14 AC_CANONICAL_HOST
15
16 AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
17 AM_MAINTAINER_MODE([enable])
18
19 # Enable silent rules if available (Introduced in AM 1.11)
20 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
21
22 AH_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.])
23 AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
24 AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
25 AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
26 AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
27 AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
28 AH_TEMPLATE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [clock_gettime() is detected.])
29
30 # Allow overriding storage used for TLS variables.
31 AC_ARG_ENABLE([compiler-tls],
32 AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
33 [def_compiler_tls=$enableval],
34 [def_compiler_tls="yes"])
35
36 # If not overridden, use ax_tls.m4 to check if TLS is available.
37 AS_IF([test "x$def_compiler_tls" = "xyes"],
38 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
39 [:])
40
41 AS_IF([test "x$def_tls_detect" = "x"],
42 [:],
43 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
44
45 # Checks for C compiler
46 AC_USE_SYSTEM_EXTENSIONS
47 AC_PROG_CC
48 AC_PROG_CC_STDC
49
50 # Checks for programs.
51 AC_PROG_AWK
52 AC_PROG_MAKE_SET
53 AC_CHECK_PROGS(NPROC, [nproc gnproc])
54 LT_INIT
55
56 # Checks for typedefs, structures, and compiler characteristics.
57 AC_C_INLINE
58 AC_TYPE_PID_T
59 AC_TYPE_SIZE_T
60 AC_TYPE_SSIZE_T
61 AC_TYPE_UINT16_T
62 AC_TYPE_INT32_T
63 AC_TYPE_UINT32_T
64 AC_TYPE_UINT64_T
65 AC_TYPE_UINT8_T
66
67 AX_C___ATTRIBUTE__
68 AS_IF([test "x$ax_cv___attribute__" = "xyes"],
69 [:],
70 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
71
72 AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
73 LIBS="$PTHREAD_LIBS $LIBS"
74 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
75 CC="$PTHREAD_CC"
76
77 # Checks for library functions.
78 AC_FUNC_MALLOC
79 AC_FUNC_MMAP
80 AC_FUNC_FORK
81 AC_CHECK_FUNCS([ \
82 atexit \
83 getcpuid \
84 gettid \
85 gettimeofday \
86 memeset \
87 memset \
88 munmap \
89 sched_getcpu \
90 strerror \
91 strtoul \
92 sysconf \
93 ])
94
95 # Check for headers
96 AC_HEADER_STDBOOL
97 AC_CHECK_HEADERS([ \
98 limits.h \
99 stddef.h \
100 sys/param.h \
101 sys/time.h \
102 ])
103
104 # Find arch type
105 AS_CASE([$host_cpu],
106 [k1om], [ARCHTYPE="x86"],
107 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
108 [i486], [ARCHTYPE="x86"],
109 [i586], [ARCHTYPE="x86"],
110 [i686], [ARCHTYPE="x86"],
111 [amd64], [ARCHTYPE="x86"],
112 [x86_64], [ARCHTYPE="x86"],
113 [powerpc], [ARCHTYPE="ppc"],
114 [ppc64], [ARCHTYPE="ppc"],
115 [powerpc64], [ARCHTYPE="ppc"],
116 [powerpc64le], [ARCHTYPE="ppc"],
117 [ppc], [ARCHTYPE="ppc"],
118 [s390], [ARCHTYPE="s390"],
119 [s390x], [ARCHTYPE="s390"],
120 [sparc], [ARCHTYPE="sparc64"],
121 [sparc64], [ARCHTYPE="sparc64"],
122 [alpha*], [ARCHTYPE="alpha"],
123 [ia64], [ARCHTYPE="ia64"],
124 [arm*], [ARCHTYPE="arm"],
125 [aarch64*], [ARCHTYPE="aarch64"],
126 [mips*], [ARCHTYPE="mips"],
127 [nios2*], [ARCHTYPE="nios2"],
128 [tile*], [ARCHTYPE="tile"],
129 [hppa*], [ARCHTYPE="hppa"],
130 [ARCHTYPE="unknown"]
131 )
132
133 AS_CASE([$host],[*-*-linux-androideabi],
134 [AM_CONDITIONAL(TARGET_IS_ANDROID, true)],
135 [AM_CONDITIONAL(TARGET_IS_ANDROID, false)]
136 )
137
138 AS_CASE([$host],[*-cygwin*],
139 [AM_CONDITIONAL(USE_CYGWIN, true)],
140 [AM_CONDITIONAL(USE_CYGWIN, false)]
141 )
142
143 AC_SUBST(ARCHTYPE)
144 AC_SUBST(SUBARCHTYPE)
145
146 UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
147 ARCHSRC=urcu/arch/$ARCHTYPE.h
148
149 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
150 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
151 ])
152
153 AS_IF([test "$host_cpu" = "armv7l"],[
154 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
155 ])
156
157 # ARM-specific checks
158 AS_IF([test "x$ARCHTYPE" = "xarm"],[
159 AC_MSG_CHECKING([for dmb instruction])
160 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
161 int main()
162 {
163 asm volatile("dmb":::"memory");
164 return 0;
165 }
166 ]])
167 ],[
168 AC_MSG_RESULT([yes])
169 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
170 ],[
171 AC_MSG_RESULT([no])
172 ])
173 ])
174
175 # Tile-specific checks
176 AS_IF([echo "$host_cpu" | grep "^tile"],[
177 AC_MSG_CHECKING([for Tile architecture type])
178 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
179 #ifndef __tilegx__
180 #error
181 #endif
182 ]])
183 ],[
184 AC_MSG_RESULT([ok])
185 ],[
186 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.])
187 ])
188 ])
189
190 # x86-specific checks
191 AS_IF([test "x$ARCHTYPE" = "xx86"],[
192 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
193 #For now, using lock; addl compatibility mode even for i686, because the
194 #Pentium III is seen as a i686, but lacks mfence instruction.
195 #Only using fence for x86_64.
196 #
197 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
198 #variant but lacks fence instructions.
199 AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om" -a "x$host_cpu" != "xk1om"],[
200 AC_MSG_RESULT([yes])
201 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
202 ],[
203 AC_MSG_RESULT([no])
204 ])
205 ])
206
207 # Check if sys_futex() is available
208 AC_MSG_CHECKING([for sys_futex()])
209 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
210 #include <sys/syscall.h>
211 #ifndef __NR_futex
212 #error "futexes not available"
213 #endif
214 ]])
215 ],[
216 AC_MSG_RESULT([yes])
217 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
218 compat_futex_test=0
219 ],[
220 AC_MSG_RESULT([no])
221 compat_futex_test=1
222 ])
223
224 # Search for clock_gettime
225 AC_SEARCH_LIBS([clock_gettime], [rt], [
226 AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
227 ], [])
228
229 # Check for pthread
230 AC_CHECK_LIB([pthread], [pthread_create],
231 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
232 [AC_CHECK_LIB([c], [pthread_create],
233 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
234 [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its location.])]
235 )]
236 )
237
238 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
239 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
240 AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
241
242 # smp-support configure option
243 AC_ARG_ENABLE([smp-support],
244 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
245 [def_smp_support=$enableval],
246 [def_smp_support="yes"])
247 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
248
249
250 # From the sched_setaffinity(2)'s man page:
251 # ~~~~
252 # The CPU affinity system calls were introduced in Linux kernel 2.5.8.
253 # The library interfaces were introduced in glibc 2.3. Initially, the
254 # glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
255 # the cpuset size argument was removed, but this argument was
256 # restored in glibc 2.3.4.
257 # ~~~~
258
259 # In addition to that, some vendors ported the system call to 2.4
260 # kernels.
261
262 # Furthermore, when the function first appeared, the MASK argument was
263 # an unsigned long pointer, while later it was made into a cpu_set_t
264 # pointer. Systems that have the cpu_set_t version also should have
265 # the CPU_ZERO, CPU_SET, etc. macros.
266
267 # All this mess means we have to cater for at least 3 different
268 # sched_setaffinity prototypes:
269
270 # ~~~~
271 # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
272 # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
273 # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
274 # ~~~~
275
276 # Since we define _GNU_SOURCE in the sources, must do so too in the
277 # autoconf tests, as defining _GNU_SOURCE or not exposes
278 # sched_setaffinity bits differently.
279 saved_CFLAGS=$CFLAGS
280 CFLAGS="$CFLAGS -D_GNU_SOURCE"
281
282 AC_CHECK_TYPES([cpu_set_t],
283 [have_cpu_set_t="yes"],
284 [have_cpu_set_t="no"],
285 [#include <sched.h>])
286
287 # Confirm that we have CPU_ZERO, and it actually works.
288 AC_MSG_CHECKING([whether CPU_ZERO works])
289 AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
290 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
291 #define _GNU_SOURCE
292 #include <sched.h>
293 int main()
294 {
295 cpu_set_t foo; CPU_ZERO(&foo);
296 return 0;
297 }
298 ]])
299 ],[
300 AC_DEFINE(HAVE_CPU_ZERO, 1)
301 AC_MSG_RESULT([yes])
302 ],[
303 AC_MSG_RESULT([no])
304 ])
305
306 # Confirm that we have CPU_SET, and it actually works.
307 AC_MSG_CHECKING([whether CPU_SET works])
308 AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
309 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
310 #define _GNU_SOURCE
311 #include <sched.h>
312 int main()
313 {
314 cpu_set_t foo, mask; CPU_SET(0, &foo);
315 return 0;
316 }
317 ]])
318 ],[
319 AC_DEFINE(HAVE_CPU_SET, 1)
320 AC_MSG_RESULT([yes])
321 ],[
322 AC_MSG_RESULT([no])
323 ])
324
325 # First check if the function is available at all.
326 AC_CHECK_FUNCS([sched_setaffinity],[
327 # Okay, we have it. Check if also have cpu_set_t. If we don't,
328 # then we have the first version using unsigned long, and no
329 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
330 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
331 # should also be present, but we confirm nonetheless.
332
333 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
334 # We do have it.
335 # Check how many arguments does sched_setaffinity take.
336 # Should be 3 or 2.
337 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
338 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
339 #include <sched.h>
340 int main()
341 {
342 cpu_set_t foo;
343 sched_setaffinity(0, sizeof (foo), &foo);
344 return 0;
345 }
346 ]])
347 ],
348 [sched_set_affinity_args=3],
349 [sched_set_affinity_args=2])
350 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
351 $sched_set_affinity_args,
352 [Defined to sched_setaffinity's number of arguments.])
353 AC_MSG_RESULT([$sched_set_affinity_args])
354 ],[
355 # No cpu_set_t, always 3 args.
356 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
357 ])
358 ])
359
360 CFLAGS=$saved_CFLAGS
361
362 AC_CONFIG_LINKS([
363 urcu/arch.h:$ARCHSRC
364 urcu/uatomic.h:$UATOMICSRC
365 ])
366 AC_CONFIG_FILES([
367 Makefile
368 doc/Makefile
369 doc/examples/Makefile
370 tests/Makefile
371 tests/common/Makefile
372 tests/unit/Makefile
373 tests/benchmark/Makefile
374 tests/regression/Makefile
375 tests/regression/regression_tests
376 tests/utils/Makefile
377 liburcu.pc
378 liburcu-bp.pc
379 liburcu-cds.pc
380 liburcu-qsbr.pc
381 liburcu-mb.pc
382 liburcu-signal.pc
383 ])
384 AC_OUTPUT
385
386 # Report on selected configure options
387 AS_IF([test "x$def_smp_support" = "xyes"],[
388 AS_ECHO("SMP support enabled.")
389 ],[
390 AS_ECHO("SMP support disabled.")
391 ])
392
393 AS_IF([test "x$def_tls_detect" = "x"],[
394 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
395 ],[
396 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
397 ])
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