eb54f4eb78f692f346b147a455fce330b5420638
[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_HEADERS([include/config.h include/urcu/config.h])
9 AC_CONFIG_AUX_DIR([config])
10 AC_CONFIG_MACRO_DIR([m4])
11
12 AC_CANONICAL_TARGET
13 AC_CANONICAL_HOST
14
15 AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip nostdinc])
16 AM_MAINTAINER_MODE([enable])
17
18 # Enable silent rules if available (Introduced in AM 1.11)
19 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
20
21 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.])
22 AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
23 AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
24 AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
25 AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
26 AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
27 AH_TEMPLATE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [clock_gettime() is detected.])
28
29 # Allow overriding storage used for TLS variables.
30 AC_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=$enableval],
33 [def_compiler_tls="yes"])
34
35 # If not overridden, use ax_tls.m4 to check if TLS is available.
36 AS_IF([test "x$def_compiler_tls" = "xyes"],
37 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
38 [:])
39
40 AS_IF([test "x$def_tls_detect" = "x"],
41 [:],
42 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
43
44 # Checks for C compiler
45 AC_USE_SYSTEM_EXTENSIONS
46 AC_PROG_CC
47 AC_PROG_CC_STDC
48
49 # Checks for programs.
50 AC_PROG_AWK
51 AC_PROG_MAKE_SET
52 AC_CHECK_PROGS(NPROC, [nproc gnproc])
53 AC_CHECK_PROGS(GETCONF, [getconf])
54 AS_IF([test "x$NPROC" != "x"],
55 [NPROC_CMD=$NPROC],
56 [AS_IF([test "x$GETCONF" != "x"],
57 [NPROC_CMD="$GETCONF _NPROCESSORS_ONLN"],
58 [NPROC_CMD="echo 1"]
59 )]
60 )
61 AC_SUBST([NPROC_CMD], [$NPROC_CMD])
62
63 LT_INIT
64
65 # Checks for typedefs, structures, and compiler characteristics.
66 AC_C_INLINE
67 AC_TYPE_PID_T
68 AC_TYPE_SIZE_T
69 AC_TYPE_SSIZE_T
70 AC_TYPE_UINT16_T
71 AC_TYPE_INT32_T
72 AC_TYPE_UINT32_T
73 AC_TYPE_UINT64_T
74 AC_TYPE_UINT8_T
75
76 AX_C___ATTRIBUTE__
77 AS_IF([test "x$ax_cv___attribute__" = "xyes"],
78 [:],
79 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
80
81 AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
82 LIBS="$PTHREAD_LIBS $LIBS"
83 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
84 CC="$PTHREAD_CC"
85
86 # Checks for library functions.
87 AC_FUNC_MALLOC
88 AC_FUNC_MMAP
89 AC_FUNC_FORK
90 AC_CHECK_FUNCS([ \
91 atexit \
92 getcpuid \
93 gettid \
94 gettimeofday \
95 memeset \
96 memset \
97 munmap \
98 sched_getcpu \
99 strerror \
100 strtoul \
101 sysconf \
102 ])
103
104 # Check for headers
105 AC_HEADER_STDBOOL
106 AC_CHECK_HEADERS([ \
107 limits.h \
108 stddef.h \
109 sys/param.h \
110 sys/time.h \
111 ])
112
113 # Find arch type
114 AS_CASE([$host_cpu],
115 [k1om], [ARCHTYPE="x86"],
116 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
117 [i486], [ARCHTYPE="x86"],
118 [i586], [ARCHTYPE="x86"],
119 [i686], [ARCHTYPE="x86"],
120 [amd64], [ARCHTYPE="x86"],
121 [x86_64], [ARCHTYPE="x86"],
122 [powerpc], [ARCHTYPE="ppc"],
123 [ppc64], [ARCHTYPE="ppc"],
124 [powerpc64], [ARCHTYPE="ppc"],
125 [powerpc64le], [ARCHTYPE="ppc"],
126 [ppc], [ARCHTYPE="ppc"],
127 [s390], [ARCHTYPE="s390"],
128 [s390x], [ARCHTYPE="s390"],
129 [sparc], [ARCHTYPE="sparc64"],
130 [sparc64], [ARCHTYPE="sparc64"],
131 [alpha*], [ARCHTYPE="alpha"],
132 [ia64], [ARCHTYPE="ia64"],
133 [arm*], [ARCHTYPE="arm"],
134 [aarch64*], [ARCHTYPE="aarch64"],
135 [mips*], [ARCHTYPE="mips"],
136 [nios2*], [ARCHTYPE="nios2"],
137 [tile*], [ARCHTYPE="tile"],
138 [hppa*], [ARCHTYPE="hppa"],
139 [ARCHTYPE="unknown"]
140 )
141
142 AS_CASE([$host],[*-cygwin*],
143 [AM_CONDITIONAL(USE_CYGWIN, true)],
144 [AM_CONDITIONAL(USE_CYGWIN, false)]
145 )
146
147 AC_SUBST(ARCHTYPE)
148 AC_SUBST(SUBARCHTYPE)
149
150 UATOMICSRC=include/urcu/uatomic/$ARCHTYPE.h
151 ARCHSRC=include/urcu/arch/$ARCHTYPE.h
152
153 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
154 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
155 ])
156
157 AS_IF([test "$host_cpu" = "armv7l"],[
158 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
159 ])
160
161 # ARM-specific checks
162 AS_IF([test "x$ARCHTYPE" = "xarm"],[
163 AC_MSG_CHECKING([for dmb instruction])
164 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
165 int main()
166 {
167 asm volatile("dmb":::"memory");
168 return 0;
169 }
170 ]])
171 ],[
172 AC_MSG_RESULT([yes])
173 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
174 ],[
175 AC_MSG_RESULT([no])
176 ])
177 ])
178
179 # Tile-specific checks
180 AS_IF([echo "$host_cpu" | grep "^tile"],[
181 AC_MSG_CHECKING([for Tile architecture type])
182 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
183 #ifndef __tilegx__
184 #error
185 #endif
186 ]])
187 ],[
188 AC_MSG_RESULT([ok])
189 ],[
190 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
191 ])
192 ])
193
194 # x86-specific checks
195 AS_IF([test "x$ARCHTYPE" = "xx86"],[
196 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
197 #For now, using lock; addl compatibility mode even for i686, because the
198 #Pentium III is seen as a i686, but lacks mfence instruction.
199 #Only using fence for x86_64.
200 #
201 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
202 #variant but lacks fence instructions.
203 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"],[
204 AC_MSG_RESULT([yes])
205 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
206 ],[
207 AC_MSG_RESULT([no])
208 ])
209 ])
210
211 # Check if sys_futex() is available
212 AC_MSG_CHECKING([for sys_futex()])
213 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
214 #include <sys/syscall.h>
215 #ifndef __NR_futex
216 #error "futexes not available"
217 #endif
218 ]])
219 ],[
220 AC_MSG_RESULT([yes])
221 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
222 compat_futex_test=0
223 ],[
224 AC_MSG_RESULT([no])
225 compat_futex_test=1
226 ])
227
228 # Search for clock_gettime
229 AC_SEARCH_LIBS([clock_gettime], [rt], [
230 AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
231 ], [])
232
233 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
234 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
235 AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
236
237 # smp-support configure option
238 AC_ARG_ENABLE([smp-support],
239 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
240 [def_smp_support=$enableval],
241 [def_smp_support="yes"])
242 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
243
244
245 # From the sched_setaffinity(2)'s man page:
246 # ~~~~
247 # The CPU affinity system calls were introduced in Linux kernel 2.5.8.
248 # The library interfaces were introduced in glibc 2.3. Initially, the
249 # glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
250 # the cpuset size argument was removed, but this argument was
251 # restored in glibc 2.3.4.
252 # ~~~~
253
254 # In addition to that, some vendors ported the system call to 2.4
255 # kernels.
256
257 # Furthermore, when the function first appeared, the MASK argument was
258 # an unsigned long pointer, while later it was made into a cpu_set_t
259 # pointer. Systems that have the cpu_set_t version also should have
260 # the CPU_ZERO, CPU_SET, etc. macros.
261
262 # All this mess means we have to cater for at least 3 different
263 # sched_setaffinity prototypes:
264
265 # ~~~~
266 # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
267 # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
268 # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
269 # ~~~~
270
271 AC_CHECK_TYPES([cpu_set_t],
272 [have_cpu_set_t="yes"],
273 [have_cpu_set_t="no"],
274 [#include <sched.h>])
275
276 # Confirm that we have CPU_ZERO, and it actually works.
277 AC_MSG_CHECKING([whether CPU_ZERO works])
278 AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
279 AC_COMPILE_IFELSE([AC_LANG_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.
295 AC_MSG_CHECKING([whether CPU_SET works])
296 AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
297 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
298 #include <sched.h>
299 int main()
300 {
301 cpu_set_t foo, mask; CPU_SET(0, &foo);
302 return 0;
303 }
304 ]])
305 ],[
306 AC_DEFINE(HAVE_CPU_SET, 1)
307 AC_MSG_RESULT([yes])
308 ],[
309 AC_MSG_RESULT([no])
310 ])
311
312 # First check if the function is available at all.
313 AC_CHECK_FUNCS([sched_setaffinity],[
314 # Okay, we have it. Check if also have cpu_set_t. If we don't,
315 # then we have the first version using unsigned long, and no
316 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
317 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
318 # should also be present, but we confirm nonetheless.
319
320 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
321 # We do have it.
322 # Check how many arguments does sched_setaffinity take.
323 # Should be 3 or 2.
324 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
325 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
326 #include <sched.h>
327 int main()
328 {
329 cpu_set_t foo;
330 sched_setaffinity(0, sizeof (foo), &foo);
331 return 0;
332 }
333 ]])
334 ],
335 [sched_set_affinity_args=3],
336 [sched_set_affinity_args=2])
337 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
338 $sched_set_affinity_args,
339 [Defined to sched_setaffinity's number of arguments.])
340 AC_MSG_RESULT([$sched_set_affinity_args])
341 ],[
342 # No cpu_set_t, always 3 args.
343 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
344 ])
345 ])
346
347 DEFAULT_INCLUDES="-include config.h"
348 AC_SUBST(DEFAULT_INCLUDES)
349
350 AC_CONFIG_LINKS([
351 include/urcu/arch.h:$ARCHSRC
352 include/urcu/uatomic.h:$UATOMICSRC
353 ])
354 AC_CONFIG_FILES([
355 Makefile
356 doc/Makefile
357 doc/examples/Makefile
358 include/Makefile
359 src/Makefile
360 tests/Makefile
361 tests/common/Makefile
362 tests/unit/Makefile
363 tests/benchmark/Makefile
364 tests/regression/Makefile
365 tests/regression/regression_tests
366 tests/utils/Makefile
367 src/liburcu.pc
368 src/liburcu-bp.pc
369 src/liburcu-cds.pc
370 src/liburcu-qsbr.pc
371 src/liburcu-mb.pc
372 src/liburcu-signal.pc
373 ])
374 AC_OUTPUT
375
376 # Report on selected configure options
377 AS_IF([test "x$def_smp_support" = "xyes"],[
378 AS_ECHO("SMP support enabled.")
379 ],[
380 AS_ECHO("SMP support disabled.")
381 ])
382
383 AS_IF([test "x$def_tls_detect" = "x"],[
384 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
385 ],[
386 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
387 ])
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