Cleanup: remove leftover manual pthread detection
[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], [5:0:1])
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], $def_tls_detect)])
44
45 # Checks for C compiler
46 AC_USE_SYSTEM_EXTENSIONS
47 AC_PROG_CC
48 AC_PROG_CC_STDC
49
50 # Checks for programs.
51 AC_PROG_AWK
52 AC_PROG_MAKE_SET
53 AC_CHECK_PROGS(NPROC, [nproc gnproc])
54 AC_CHECK_PROGS(GETCONF, [getconf])
55 AS_IF([test "x$NPROC" != "x"],
56 [NPROC_CMD=$NPROC],
57 [AS_IF([test "x$GETCONF" != "x"],
58 [NPROC_CMD="$GETCONF _NPROCESSORS_ONLN"],
59 [NPROC_CMD="echo 1"]
60 )]
61 )
62 AC_SUBST([NPROC_CMD], [$NPROC_CMD])
63
64 LT_INIT
65
66 # Checks for typedefs, structures, and compiler characteristics.
67 AC_C_INLINE
68 AC_TYPE_PID_T
69 AC_TYPE_SIZE_T
70 AC_TYPE_SSIZE_T
71 AC_TYPE_UINT16_T
72 AC_TYPE_INT32_T
73 AC_TYPE_UINT32_T
74 AC_TYPE_UINT64_T
75 AC_TYPE_UINT8_T
76
77 AX_C___ATTRIBUTE__
78 AS_IF([test "x$ax_cv___attribute__" = "xyes"],
79 [:],
80 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
81
82 AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
83 LIBS="$PTHREAD_LIBS $LIBS"
84 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
85 CC="$PTHREAD_CC"
86
87 # Checks for library functions.
88 AC_FUNC_MALLOC
89 AC_FUNC_MMAP
90 AC_FUNC_FORK
91 AC_CHECK_FUNCS([ \
92 atexit \
93 getcpuid \
94 gettid \
95 gettimeofday \
96 memeset \
97 memset \
98 munmap \
99 sched_getcpu \
100 strerror \
101 strtoul \
102 sysconf \
103 ])
104
105 # Check for headers
106 AC_HEADER_STDBOOL
107 AC_CHECK_HEADERS([ \
108 limits.h \
109 stddef.h \
110 sys/param.h \
111 sys/time.h \
112 ])
113
114 # Find arch type
115 AS_CASE([$host_cpu],
116 [k1om], [ARCHTYPE="x86"],
117 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
118 [i486], [ARCHTYPE="x86"],
119 [i586], [ARCHTYPE="x86"],
120 [i686], [ARCHTYPE="x86"],
121 [amd64], [ARCHTYPE="x86"],
122 [x86_64], [ARCHTYPE="x86"],
123 [powerpc], [ARCHTYPE="ppc"],
124 [ppc64], [ARCHTYPE="ppc"],
125 [powerpc64], [ARCHTYPE="ppc"],
126 [powerpc64le], [ARCHTYPE="ppc"],
127 [ppc], [ARCHTYPE="ppc"],
128 [s390], [ARCHTYPE="s390"],
129 [s390x], [ARCHTYPE="s390"],
130 [sparc], [ARCHTYPE="sparc64"],
131 [sparc64], [ARCHTYPE="sparc64"],
132 [alpha*], [ARCHTYPE="alpha"],
133 [ia64], [ARCHTYPE="ia64"],
134 [arm*], [ARCHTYPE="arm"],
135 [aarch64*], [ARCHTYPE="aarch64"],
136 [mips*], [ARCHTYPE="mips"],
137 [nios2*], [ARCHTYPE="nios2"],
138 [tile*], [ARCHTYPE="tile"],
139 [hppa*], [ARCHTYPE="hppa"],
140 [ARCHTYPE="unknown"]
141 )
142
143 AS_CASE([$host],[*-cygwin*],
144 [AM_CONDITIONAL(USE_CYGWIN, true)],
145 [AM_CONDITIONAL(USE_CYGWIN, false)]
146 )
147
148 AC_SUBST(ARCHTYPE)
149 AC_SUBST(SUBARCHTYPE)
150
151 UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
152 ARCHSRC=urcu/arch/$ARCHTYPE.h
153
154 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
155 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
156 ])
157
158 AS_IF([test "$host_cpu" = "armv7l"],[
159 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
160 ])
161
162 # ARM-specific checks
163 AS_IF([test "x$ARCHTYPE" = "xarm"],[
164 AC_MSG_CHECKING([for dmb instruction])
165 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
166 int main()
167 {
168 asm volatile("dmb":::"memory");
169 return 0;
170 }
171 ]])
172 ],[
173 AC_MSG_RESULT([yes])
174 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
175 ],[
176 AC_MSG_RESULT([no])
177 ])
178 ])
179
180 # Tile-specific checks
181 AS_IF([echo "$host_cpu" | grep "^tile"],[
182 AC_MSG_CHECKING([for Tile architecture type])
183 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
184 #ifndef __tilegx__
185 #error
186 #endif
187 ]])
188 ],[
189 AC_MSG_RESULT([ok])
190 ],[
191 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
192 ])
193 ])
194
195 # x86-specific checks
196 AS_IF([test "x$ARCHTYPE" = "xx86"],[
197 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
198 #For now, using lock; addl compatibility mode even for i686, because the
199 #Pentium III is seen as a i686, but lacks mfence instruction.
200 #Only using fence for x86_64.
201 #
202 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
203 #variant but lacks fence instructions.
204 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"],[
205 AC_MSG_RESULT([yes])
206 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
207 ],[
208 AC_MSG_RESULT([no])
209 ])
210 ])
211
212 # Check if sys_futex() is available
213 AC_MSG_CHECKING([for sys_futex()])
214 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
215 #include <sys/syscall.h>
216 #ifndef __NR_futex
217 #error "futexes not available"
218 #endif
219 ]])
220 ],[
221 AC_MSG_RESULT([yes])
222 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
223 compat_futex_test=0
224 ],[
225 AC_MSG_RESULT([no])
226 compat_futex_test=1
227 ])
228
229 # Search for clock_gettime
230 AC_SEARCH_LIBS([clock_gettime], [rt], [
231 AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
232 ], [])
233
234 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
235 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
236 AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
237
238 # smp-support configure option
239 AC_ARG_ENABLE([smp-support],
240 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
241 [def_smp_support=$enableval],
242 [def_smp_support="yes"])
243 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
244
245
246 # From the sched_setaffinity(2)'s man page:
247 # ~~~~
248 # The CPU affinity system calls were introduced in Linux kernel 2.5.8.
249 # The library interfaces were introduced in glibc 2.3. Initially, the
250 # glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
251 # the cpuset size argument was removed, but this argument was
252 # restored in glibc 2.3.4.
253 # ~~~~
254
255 # In addition to that, some vendors ported the system call to 2.4
256 # kernels.
257
258 # Furthermore, when the function first appeared, the MASK argument was
259 # an unsigned long pointer, while later it was made into a cpu_set_t
260 # pointer. Systems that have the cpu_set_t version also should have
261 # the CPU_ZERO, CPU_SET, etc. macros.
262
263 # All this mess means we have to cater for at least 3 different
264 # sched_setaffinity prototypes:
265
266 # ~~~~
267 # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
268 # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
269 # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
270 # ~~~~
271
272 # Since we define _GNU_SOURCE in the sources, must do so too in the
273 # autoconf tests, as defining _GNU_SOURCE or not exposes
274 # sched_setaffinity bits differently.
275 saved_CFLAGS=$CFLAGS
276 CFLAGS="$CFLAGS -D_GNU_SOURCE"
277
278 AC_CHECK_TYPES([cpu_set_t],
279 [have_cpu_set_t="yes"],
280 [have_cpu_set_t="no"],
281 [#include <sched.h>])
282
283 # Confirm that we have CPU_ZERO, and it actually works.
284 AC_MSG_CHECKING([whether CPU_ZERO works])
285 AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
286 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
287 #define _GNU_SOURCE
288 #include <sched.h>
289 int main()
290 {
291 cpu_set_t foo; CPU_ZERO(&foo);
292 return 0;
293 }
294 ]])
295 ],[
296 AC_DEFINE(HAVE_CPU_ZERO, 1)
297 AC_MSG_RESULT([yes])
298 ],[
299 AC_MSG_RESULT([no])
300 ])
301
302 # Confirm that we have CPU_SET, and it actually works.
303 AC_MSG_CHECKING([whether CPU_SET works])
304 AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
305 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
306 #define _GNU_SOURCE
307 #include <sched.h>
308 int main()
309 {
310 cpu_set_t foo, mask; CPU_SET(0, &foo);
311 return 0;
312 }
313 ]])
314 ],[
315 AC_DEFINE(HAVE_CPU_SET, 1)
316 AC_MSG_RESULT([yes])
317 ],[
318 AC_MSG_RESULT([no])
319 ])
320
321 # First check if the function is available at all.
322 AC_CHECK_FUNCS([sched_setaffinity],[
323 # Okay, we have it. Check if also have cpu_set_t. If we don't,
324 # then we have the first version using unsigned long, and no
325 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
326 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
327 # should also be present, but we confirm nonetheless.
328
329 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
330 # We do have it.
331 # Check how many arguments does sched_setaffinity take.
332 # Should be 3 or 2.
333 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
334 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
335 #include <sched.h>
336 int main()
337 {
338 cpu_set_t foo;
339 sched_setaffinity(0, sizeof (foo), &foo);
340 return 0;
341 }
342 ]])
343 ],
344 [sched_set_affinity_args=3],
345 [sched_set_affinity_args=2])
346 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
347 $sched_set_affinity_args,
348 [Defined to sched_setaffinity's number of arguments.])
349 AC_MSG_RESULT([$sched_set_affinity_args])
350 ],[
351 # No cpu_set_t, always 3 args.
352 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
353 ])
354 ])
355
356 CFLAGS=$saved_CFLAGS
357
358 AC_CONFIG_LINKS([
359 urcu/arch.h:$ARCHSRC
360 urcu/uatomic.h:$UATOMICSRC
361 ])
362 AC_CONFIG_FILES([
363 Makefile
364 doc/Makefile
365 doc/examples/Makefile
366 tests/Makefile
367 tests/common/Makefile
368 tests/unit/Makefile
369 tests/benchmark/Makefile
370 tests/regression/Makefile
371 tests/regression/regression_tests
372 tests/utils/Makefile
373 liburcu.pc
374 liburcu-bp.pc
375 liburcu-cds.pc
376 liburcu-qsbr.pc
377 liburcu-mb.pc
378 liburcu-signal.pc
379 ])
380 AC_OUTPUT
381
382 # Report on selected configure options
383 AS_IF([test "x$def_smp_support" = "xyes"],[
384 AS_ECHO("SMP support enabled.")
385 ],[
386 AS_ECHO("SMP support disabled.")
387 ])
388
389 AS_IF([test "x$def_tls_detect" = "x"],[
390 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
391 ],[
392 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
393 ])
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