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