020adfc2648950b2f591c25ba7d671c8bcab3f62
[urcu.git] / configure.ac
1 AC_PREREQ(2.59)
2 AC_INIT([userspace-rcu],[0.10.0-pre],[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 AH_TEMPLATE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [Require the operating system to support the membarrier system call for default and bulletproof flavors.])
29 AH_TEMPLATE([CONFIG_RCU_DEBUG], [Enable internal debugging self-checks. Introduce performance penalty.])
30
31 # Allow requiring the operating system to support the membarrier system
32 # call. Applies to default and bulletproof flavors.
33 AC_ARG_ENABLE([sys-membarrier-fallback],
34 AS_HELP_STRING([--disable-sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.]),
35 [def_sys_membarrier_fallback=$enableval],
36 [def_sys_membarrier_fallback="yes"])
37 AS_IF([test "x$def_sys_membarrier_fallback" != "xyes"], [AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1])])
38
39 # Allow overriding storage used for TLS variables.
40 AC_ARG_ENABLE([compiler-tls],
41 AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
42 [def_compiler_tls=$enableval],
43 [def_compiler_tls="yes"])
44
45 # If not overridden, use ax_tls.m4 to check if TLS is available.
46 AS_IF([test "x$def_compiler_tls" = "xyes"],
47 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
48 [:])
49
50 AS_IF([test "x$def_tls_detect" = "x"],
51 [:],
52 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
53
54 # Checks for C compiler
55 AC_USE_SYSTEM_EXTENSIONS
56 AC_PROG_CC
57 AC_PROG_CC_STDC
58
59 # Checks for programs.
60 AC_PROG_AWK
61 AC_PROG_MAKE_SET
62 AC_CHECK_PROGS(NPROC, [nproc gnproc])
63 AC_CHECK_PROGS(GETCONF, [getconf])
64 AS_IF([test "x$NPROC" != "x"],
65 [NPROC_CMD=$NPROC],
66 [AS_IF([test "x$GETCONF" != "x"],
67 [NPROC_CMD="$GETCONF _NPROCESSORS_ONLN"],
68 [NPROC_CMD="echo 1"]
69 )]
70 )
71 AC_SUBST([NPROC_CMD], [$NPROC_CMD])
72
73 LT_INIT
74
75 # Checks for typedefs, structures, and compiler characteristics.
76 AC_C_INLINE
77 AC_TYPE_PID_T
78 AC_TYPE_SIZE_T
79 AC_TYPE_SSIZE_T
80 AC_TYPE_UINT16_T
81 AC_TYPE_INT32_T
82 AC_TYPE_UINT32_T
83 AC_TYPE_UINT64_T
84 AC_TYPE_UINT8_T
85
86 AX_C___ATTRIBUTE__
87 AS_IF([test "x$ax_cv___attribute__" = "xyes"],
88 [:],
89 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
90
91 AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
92
93 AM_CFLAGS="$AM_CFLAGS $PTHREAD_CFLAGS"
94
95 # Checks for library functions.
96 AC_FUNC_MMAP
97 AC_FUNC_FORK
98 AC_CHECK_FUNCS([ \
99 atexit \
100 getcpuid \
101 gettid \
102 gettimeofday \
103 memeset \
104 memset \
105 munmap \
106 rand_r \
107 sched_getcpu \
108 strerror \
109 strtoul \
110 sysconf \
111 ])
112
113 # AC_FUNC_MALLOC causes problems when cross-compiling.
114 #AC_FUNC_MALLOC
115
116 # Check for headers
117 AC_HEADER_STDBOOL
118 AC_CHECK_HEADERS([ \
119 limits.h \
120 stddef.h \
121 sys/param.h \
122 sys/time.h \
123 ])
124
125 # Find arch type
126 AS_CASE([$host_cpu],
127 [k1om], [ARCHTYPE="x86"],
128 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
129 [i486], [ARCHTYPE="x86"],
130 [i586], [ARCHTYPE="x86"],
131 [i686], [ARCHTYPE="x86"],
132 [amd64], [ARCHTYPE="x86"],
133 [x86_64], [ARCHTYPE="x86"],
134 [powerpc], [ARCHTYPE="ppc"],
135 [ppc64], [ARCHTYPE="ppc"],
136 [powerpc64], [ARCHTYPE="ppc"],
137 [powerpc64le], [ARCHTYPE="ppc"],
138 [ppc], [ARCHTYPE="ppc"],
139 [s390], [ARCHTYPE="s390"],
140 [s390x], [ARCHTYPE="s390"],
141 [sparc], [ARCHTYPE="sparc64"],
142 [sparc64], [ARCHTYPE="sparc64"],
143 [alpha*], [ARCHTYPE="alpha"],
144 [ia64], [ARCHTYPE="ia64"],
145 [arm*], [ARCHTYPE="arm"],
146 [aarch64*], [ARCHTYPE="aarch64"],
147 [mips*], [ARCHTYPE="mips"],
148 [nios2*], [ARCHTYPE="nios2"],
149 [tile*], [ARCHTYPE="tile"],
150 [hppa*], [ARCHTYPE="hppa"],
151 [ARCHTYPE="unknown"]
152 )
153
154 AS_CASE([$host],[*-cygwin*],
155 [AM_CONDITIONAL(USE_CYGWIN, true)],
156 [AM_CONDITIONAL(USE_CYGWIN, false)]
157 )
158
159 AC_SUBST(ARCHTYPE)
160 AC_SUBST(SUBARCHTYPE)
161
162 UATOMICSRC=include/urcu/uatomic/$ARCHTYPE.h
163 ARCHSRC=include/urcu/arch/$ARCHTYPE.h
164
165 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
166 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
167 ])
168
169 AS_IF([test "$host_cpu" = "armv7l"],[
170 AM_CFLAGS="$AM_CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
171 ])
172
173 # ARM-specific checks
174 AS_IF([test "x$ARCHTYPE" = "xarm"],[
175 AC_MSG_CHECKING([for dmb instruction])
176 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
177 int main()
178 {
179 asm volatile("dmb":::"memory");
180 return 0;
181 }
182 ]])
183 ],[
184 AC_MSG_RESULT([yes])
185 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
186 ],[
187 AC_MSG_RESULT([no])
188 ])
189 ])
190
191 # Tile-specific checks
192 AS_IF([echo "$host_cpu" | grep "^tile"],[
193 AC_MSG_CHECKING([for Tile architecture type])
194 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
195 #ifndef __tilegx__
196 #error
197 #endif
198 ]])
199 ],[
200 AC_MSG_RESULT([ok])
201 ],[
202 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.])
203 ])
204 ])
205
206 # x86-specific checks
207 AS_IF([test "x$ARCHTYPE" = "xx86"],[
208 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
209 #For now, using lock; addl compatibility mode even for i686, because the
210 #Pentium III is seen as a i686, but lacks mfence instruction.
211 #Only using fence for x86_64.
212 #
213 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
214 #variant but lacks fence instructions.
215 AS_IF([test "x$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$host_cpu" != "xk1om"],[
216 AC_MSG_RESULT([yes])
217 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
218 config_rcu_have_fence=yes
219 ],[
220 AC_MSG_RESULT([no])
221 config_rcu_have_fence=no
222 ])
223 ])
224
225 # Check if sys_futex() is available
226 AC_MSG_CHECKING([for sys_futex()])
227 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
228 #include <sys/syscall.h>
229 #ifndef __NR_futex
230 #error "futexes not available"
231 #endif
232 ]])
233 ],[
234 AC_MSG_RESULT([yes])
235 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
236 compat_futex_test=0
237 ],[
238 AC_MSG_RESULT([no])
239 compat_futex_test=1
240 ])
241
242 # Search for clock_gettime
243 AC_SEARCH_LIBS([clock_gettime], [rt], [
244 AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
245 config_rcu_have_clock_gettime=yes
246 ], [])
247
248 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
249 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
250 AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
251
252 # smp-support configure option
253 AC_ARG_ENABLE([smp-support],
254 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
255 [def_smp_support=$enableval],
256 [def_smp_support="yes"])
257 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
258
259 # RCU debugging option
260 AC_ARG_ENABLE([rcu-debug],
261 AS_HELP_STRING([--enable-rcu-debug], [Enable internal debugging
262 self-checks. Introduce performance penalty.]))
263 AS_IF([test "x$enable_rcu_debug" = "xyes"], [
264 AC_DEFINE([CONFIG_RCU_DEBUG], [1])
265 ])
266
267 # From the sched_setaffinity(2)'s man page:
268 # ~~~~
269 # The CPU affinity system calls were introduced in Linux kernel 2.5.8.
270 # The library interfaces were introduced in glibc 2.3. Initially, the
271 # glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
272 # the cpuset size argument was removed, but this argument was
273 # restored in glibc 2.3.4.
274 # ~~~~
275
276 # In addition to that, some vendors ported the system call to 2.4
277 # kernels.
278
279 # Furthermore, when the function first appeared, the MASK argument was
280 # an unsigned long pointer, while later it was made into a cpu_set_t
281 # pointer. Systems that have the cpu_set_t version also should have
282 # the CPU_ZERO, CPU_SET, etc. macros.
283
284 # All this mess means we have to cater for at least 3 different
285 # sched_setaffinity prototypes:
286
287 # ~~~~
288 # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
289 # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
290 # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
291 # ~~~~
292
293 AC_CHECK_TYPES([cpu_set_t],
294 [have_cpu_set_t="yes"],
295 [have_cpu_set_t="no"],
296 [#include <sched.h>])
297
298 # Confirm that we have CPU_ZERO, and it actually works.
299 AC_MSG_CHECKING([whether CPU_ZERO works])
300 AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
301 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
302 #include <sched.h>
303 int main()
304 {
305 cpu_set_t foo; CPU_ZERO(&foo);
306 return 0;
307 }
308 ]])
309 ],[
310 AC_DEFINE(HAVE_CPU_ZERO, 1)
311 AC_MSG_RESULT([yes])
312 ],[
313 AC_MSG_RESULT([no])
314 ])
315
316 # Confirm that we have CPU_SET, and it actually works.
317 AC_MSG_CHECKING([whether CPU_SET works])
318 AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
319 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
320 #include <sched.h>
321 int main()
322 {
323 cpu_set_t foo, mask; CPU_SET(0, &foo);
324 return 0;
325 }
326 ]])
327 ],[
328 AC_DEFINE(HAVE_CPU_SET, 1)
329 AC_MSG_RESULT([yes])
330 ],[
331 AC_MSG_RESULT([no])
332 ])
333
334 # First check if the function is available at all.
335 AC_CHECK_FUNCS([sched_setaffinity],[
336 # Okay, we have it. Check if also have cpu_set_t. If we don't,
337 # then we have the first version using unsigned long, and no
338 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
339 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
340 # should also be present, but we confirm nonetheless.
341
342 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
343 # We do have it.
344 # Check how many arguments does sched_setaffinity take.
345 # Should be 3 or 2.
346 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
347 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
348 #include <sched.h>
349 int main()
350 {
351 cpu_set_t foo;
352 sched_setaffinity(0, sizeof (foo), &foo);
353 return 0;
354 }
355 ]])
356 ],
357 [sched_set_affinity_args=3],
358 [sched_set_affinity_args=2])
359 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
360 $sched_set_affinity_args,
361 [Defined to sched_setaffinity's number of arguments.])
362 AC_MSG_RESULT([$sched_set_affinity_args])
363 ],[
364 # No cpu_set_t, always 3 args.
365 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
366 ])
367 ])
368
369 AM_CPPFLAGS="-include config.h"
370 AC_SUBST(AM_CPPFLAGS)
371
372 AM_CFLAGS="-Wall $AM_CFLAGS"
373 AC_SUBST(AM_CFLAGS)
374
375 AC_CONFIG_LINKS([
376 include/urcu/arch.h:$ARCHSRC
377 include/urcu/uatomic.h:$UATOMICSRC
378 ])
379 AC_CONFIG_FILES([
380 Makefile
381 doc/Makefile
382 doc/examples/Makefile
383 include/Makefile
384 src/Makefile
385 tests/Makefile
386 tests/common/Makefile
387 tests/unit/Makefile
388 tests/benchmark/Makefile
389 tests/regression/Makefile
390 tests/regression/regression_tests
391 tests/utils/Makefile
392 src/liburcu.pc
393 src/liburcu-bp.pc
394 src/liburcu-cds.pc
395 src/liburcu-qsbr.pc
396 src/liburcu-mb.pc
397 src/liburcu-signal.pc
398 ])
399 AC_OUTPUT
400
401 #
402 # Mini-report on what will be built.
403 #
404
405 PPRINT_INIT
406 PPRINT_SET_INDENT(1)
407 PPRINT_SET_TS(38)
408
409 AS_ECHO
410 AS_ECHO("${PPRINT_COLOR_BLDBLU}Userspace-RCU $PACKAGE_VERSION${PPRINT_COLOR_RST}")
411 AS_ECHO
412
413 PPRINT_SUBTITLE([Features])
414
415 PPRINT_PROP_STRING([Target architecture], $host_cpu)
416
417 # SMP support enabled/disabled
418 test "x$def_smp_support" = "xyes" && value=1 || value=0
419 PPRINT_PROP_BOOL([SMP support], $value)
420
421 # Memory fence support available
422 test "x$config_rcu_have_fence" = "xyes" && value=1 || value=0
423 PPRINT_PROP_BOOL([Memory fence instructions], $value)
424
425 # Futex support available
426 test "x$compat_futex_test" = "x0" && value=1 || value=0
427 PPRINT_PROP_BOOL([Futex support], $value)
428
429 # TLS
430 test "x$def_tls_detect" = "x" && value="pthread_getspecific()" || value="$def_tls_detect"
431 PPRINT_PROP_STRING([Thread Local Storage (TLS)], [$value])
432
433 # clock_gettime() available
434 test "x$config_rcu_have_clock_gettime" = "xyes" && value=1 || value=0
435 PPRINT_PROP_BOOL([clock_gettime()], $value)
436
437 # Require membarrier
438 test "x$def_sys_membarrier_fallback" != "xyes" && value=1 || value=0
439 PPRINT_PROP_BOOL([Require membarrier], $value)
440
441 # RCU debug enabled/disabled
442 test "x$enable_rcu_debug" = "xyes" && value=1 || value=0
443 PPRINT_PROP_BOOL([Internal debugging], $value)
444
445 report_bindir="`eval eval echo $bindir`"
446 report_libdir="`eval eval echo $libdir`"
447
448 # Print the bindir and libdir this `make install' will install into.
449 AS_ECHO
450 PPRINT_SUBTITLE([Install directories])
451 PPRINT_PROP_STRING([Binaries], [$report_bindir])
452 PPRINT_PROP_STRING([Libraries], [$report_libdir])
453
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