Version 0.9.0
[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
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], $def_tls_detect)])
43
44 # Checks for C compiler
45 AC_USE_SYSTEM_EXTENSIONS
46 AC_PROG_CC
47 AC_PROG_CC_STDC
48
49 # Checks for programs.
50 AC_PROG_AWK
51 AC_PROG_MAKE_SET
52 AC_CHECK_PROGS(NPROC, [nproc gnproc])
53 LT_INIT
54
55 # Checks for typedefs, structures, and compiler characteristics.
56 AC_C_INLINE
57 AC_TYPE_PID_T
58 AC_TYPE_SIZE_T
59 AC_TYPE_SSIZE_T
60 AC_TYPE_UINT16_T
61 AC_TYPE_INT32_T
62 AC_TYPE_UINT32_T
63 AC_TYPE_UINT64_T
64 AC_TYPE_UINT8_T
65
66 AX_C___ATTRIBUTE__
67 AS_IF([test "x$ax_cv___attribute__" = "xyes"],
68 [:],
69 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
70
71 AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
72 LIBS="$PTHREAD_LIBS $LIBS"
73 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
74 CC="$PTHREAD_CC"
75
76 # Checks for library functions.
77 AC_FUNC_MALLOC
78 AC_FUNC_MMAP
79 AC_FUNC_FORK
80 AC_CHECK_FUNCS([ \
81 atexit \
82 clock_gettime \
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([$host_cpu],
106 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
107 [i486], [ARCHTYPE="x86"],
108 [i586], [ARCHTYPE="x86"],
109 [i686], [ARCHTYPE="x86"],
110 [amd64], [ARCHTYPE="x86"],
111 [x86_64], [ARCHTYPE="x86"],
112 [powerpc], [ARCHTYPE="ppc"],
113 [ppc64], [ARCHTYPE="ppc"],
114 [powerpc64], [ARCHTYPE="ppc"],
115 [powerpc64le], [ARCHTYPE="ppc"],
116 [ppc], [ARCHTYPE="ppc"],
117 [s390], [ARCHTYPE="s390"],
118 [s390x], [ARCHTYPE="s390"],
119 [sparc], [ARCHTYPE="sparc64"],
120 [sparc64], [ARCHTYPE="sparc64"],
121 [alpha*], [ARCHTYPE="alpha"],
122 [ia64], [ARCHTYPE="ia64"],
123 [arm*], [ARCHTYPE="arm"],
124 [aarch64], [ARCHTYPE="aarch64"],
125 [mips*], [ARCHTYPE="mips"],
126 [tile*], [ARCHTYPE="tile"],
127 [hppa*], [ARCHTYPE="hppa"],
128 [ARCHTYPE="unknown"]
129 )
130
131 AS_CASE([$host],[*-*-linux-androideabi],
132 [AM_CONDITIONAL(TARGET_IS_ANDROID, true)],
133 [AM_CONDITIONAL(TARGET_IS_ANDROID, false)]
134 )
135
136 AC_SUBST(ARCHTYPE)
137 AC_SUBST(SUBARCHTYPE)
138
139 UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
140 ARCHSRC=urcu/arch/$ARCHTYPE.h
141
142 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
143 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
144 ])
145
146 AS_IF([test "$host_cpu" = "armv7l"],[
147 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
148 ])
149
150 # ARM-specific checks
151 AS_IF([test "x$ARCHTYPE" = "xarm"],[
152 AC_MSG_CHECKING([for dmb instruction])
153 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
154 int main()
155 {
156 asm volatile("dmb":::"memory");
157 return 0;
158 }
159 ]])
160 ],[
161 AC_MSG_RESULT([yes])
162 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
163 ],[
164 AC_MSG_RESULT([no])
165 ])
166 ])
167
168 # Tile-specific checks
169 AS_IF([echo "$host_cpu" | grep "^tile"],[
170 AC_MSG_CHECKING([for Tile architecture type])
171 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
172 #ifndef __tilegx__
173 #error
174 #endif
175 ]])
176 ],[
177 AC_MSG_RESULT([ok])
178 ],[
179 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
180 ])
181 ])
182
183 # x86-specific checks
184 AS_IF([test "x$ARCHTYPE" = "xx86"],[
185 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
186 #For now, using lock; addl compatibility mode even for i686, because the
187 #Pentium III is seen as a i686, but lacks mfence instruction.
188 #Only using fence for x86_64.
189 #
190 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
191 #variant but lacks fence instructions.
192 AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om"],[
193 AC_MSG_RESULT([yes])
194 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
195 ],[
196 AC_MSG_RESULT([no])
197 ])
198 ])
199
200 # Check if sys_futex() is available
201 AC_MSG_CHECKING([for sys_futex()])
202 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
203 #include <sys/syscall.h>
204 #ifndef __NR_futex
205 #error "futexes not available"
206 #endif
207 ]])
208 ],[
209 AC_MSG_RESULT([yes])
210 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
211 compat_futex_test=0
212 ],[
213 AC_MSG_RESULT([no])
214 compat_futex_test=1
215 ])
216
217 # Check for pthread
218 AC_CHECK_LIB([pthread], [pthread_create],
219 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
220 [AC_CHECK_LIB([c], [pthread_create],
221 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
222 [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its location.])]
223 )]
224 )
225
226 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
227 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
228 AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
229
230 # smp-support configure option
231 AC_ARG_ENABLE([smp-support],
232 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
233 [def_smp_support=$enableval],
234 [def_smp_support="yes"])
235 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
236
237
238 # From the sched_setaffinity(2)'s man page:
239 # ~~~~
240 # The CPU affinity system calls were introduced in Linux kernel 2.5.8.
241 # The library interfaces were introduced in glibc 2.3. Initially, the
242 # glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
243 # the cpuset size argument was removed, but this argument was
244 # restored in glibc 2.3.4.
245 # ~~~~
246
247 # In addition to that, some vendors ported the system call to 2.4
248 # kernels.
249
250 # Furthermore, when the function first appeared, the MASK argument was
251 # an unsigned long pointer, while later it was made into a cpu_set_t
252 # pointer. Systems that have the cpu_set_t version also should have
253 # the CPU_ZERO, CPU_SET, etc. macros.
254
255 # All this mess means we have to cater for at least 3 different
256 # sched_setaffinity prototypes:
257
258 # ~~~~
259 # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
260 # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
261 # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
262 # ~~~~
263
264 # Since we define _GNU_SOURCE in the sources, must do so too in the
265 # autoconf tests, as defining _GNU_SOURCE or not exposes
266 # sched_setaffinity bits differently.
267 saved_CFLAGS=$CFLAGS
268 CFLAGS="$CFLAGS -D_GNU_SOURCE"
269
270 AC_CHECK_TYPES([cpu_set_t],
271 [have_cpu_set_t="yes"],
272 [have_cpu_set_t="no"],
273 [#include <sched.h>])
274
275 # Confirm that we have CPU_ZERO, and it actually works.
276 AC_MSG_CHECKING([whether CPU_ZERO works])
277 AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
278 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
279 #define _GNU_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 #define _GNU_SOURCE
299 #include <sched.h>
300 int main()
301 {
302 cpu_set_t foo, mask; CPU_SET(0, &foo);
303 return 0;
304 }
305 ]])
306 ],[
307 AC_DEFINE(HAVE_CPU_SET, 1)
308 AC_MSG_RESULT([yes])
309 ],[
310 AC_MSG_RESULT([no])
311 ])
312
313 # First check if the function is available at all.
314 AC_CHECK_FUNCS([sched_setaffinity],[
315 # Okay, we have it. Check if also have cpu_set_t. If we don't,
316 # then we have the first version using unsigned long, and no
317 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
318 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
319 # should also be present, but we confirm nonetheless.
320
321 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
322 # We do have it.
323 # Check how many arguments does sched_setaffinity take.
324 # Should be 3 or 2.
325 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
326 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
327 #include <sched.h>
328 int main()
329 {
330 cpu_set_t foo;
331 sched_setaffinity(0, sizeof (foo), &foo);
332 return 0;
333 }
334 ]])
335 ],
336 [sched_set_affinity_args=3],
337 [sched_set_affinity_args=2])
338 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
339 $sched_set_affinity_args,
340 [Defined to sched_setaffinity's number of arguments.])
341 AC_MSG_RESULT([$sched_set_affinity_args])
342 ],[
343 # No cpu_set_t, always 3 args.
344 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
345 ])
346 ])
347
348 CFLAGS=$saved_CFLAGS
349
350 AC_CONFIG_LINKS([
351 urcu/arch.h:$ARCHSRC
352 urcu/uatomic.h:$UATOMICSRC
353 ])
354 AC_CONFIG_FILES([
355 Makefile
356 doc/Makefile
357 doc/examples/Makefile
358 tests/Makefile
359 tests/common/Makefile
360 tests/unit/Makefile
361 tests/benchmark/Makefile
362 tests/regression/Makefile
363 tests/regression/regression_tests
364 tests/utils/Makefile
365 liburcu.pc
366 liburcu-bp.pc
367 liburcu-cds.pc
368 liburcu-qsbr.pc
369 liburcu-mb.pc
370 liburcu-signal.pc
371 ])
372 AC_OUTPUT
373
374 # Report on selected configure options
375 AS_IF([test "x$def_smp_support" = "xyes"],[
376 AS_ECHO("SMP support enabled.")
377 ],[
378 AS_ECHO("SMP support disabled.")
379 ])
380
381 AS_IF([test "x$def_tls_detect" = "x"],[
382 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
383 ],[
384 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
385 ])
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