c2f8c84983858c70513f5e234a79382d6dd42377
[urcu.git] / configure.ac
1 AC_PREREQ(2.59)
2 AC_INIT([userspace-rcu],[0.8.0],[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], [3:0:0])
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], $def_tls_detect)])
43
44 # Checks for C compiler
45 AC_USE_SYSTEM_EXTENSIONS
46 AC_PROG_CC
47 AC_PROG_CC_STDC
48
49 # Checks for programs.
50 AC_PROG_MAKE_SET
51 AC_CHECK_PROGS(NPROC, [nproc gnproc])
52 LT_INIT
53
54 # Checks for typedefs, structures, and compiler characteristics.
55 AC_C_INLINE
56 AC_TYPE_PID_T
57 AC_TYPE_SIZE_T
58 AC_TYPE_INT32_T
59 AC_TYPE_UINT32_T
60 AC_TYPE_UINT64_T
61 AC_TYPE_UINT8_T
62
63 AX_C___ATTRIBUTE__
64 AS_IF([test "x$ax_cv___attribute__" = "xyes"],
65 [:],
66 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
67
68 AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
69 LIBS="$PTHREAD_LIBS $LIBS"
70 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
71 CC="$PTHREAD_CC"
72
73 # Checks for library functions.
74 AC_FUNC_MALLOC
75 AC_FUNC_MMAP
76 AC_CHECK_FUNCS(
77 [memset gettimeofday munmap sched_getcpu getcpuid strtoul sysconf gettid memeset strerror]
78 )
79
80 # Check for headers
81 AC_CHECK_HEADERS([limits.h stddef.h sys/time.h])
82
83 # Find arch type
84 AS_CASE([$host_cpu],
85 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
86 [i486], [ARCHTYPE="x86"],
87 [i586], [ARCHTYPE="x86"],
88 [i686], [ARCHTYPE="x86"],
89 [amd64], [ARCHTYPE="x86"],
90 [x86_64], [ARCHTYPE="x86"],
91 [powerpc], [ARCHTYPE="ppc"],
92 [ppc64], [ARCHTYPE="ppc"],
93 [powerpc64], [ARCHTYPE="ppc"],
94 [powerpc64le], [ARCHTYPE="ppc"],
95 [ppc], [ARCHTYPE="ppc"],
96 [s390], [ARCHTYPE="s390"],
97 [s390x], [ARCHTYPE="s390"],
98 [sparc], [ARCHTYPE="sparc64"],
99 [sparc64], [ARCHTYPE="sparc64"],
100 [alpha*], [ARCHTYPE="alpha"],
101 [ia64], [ARCHTYPE="ia64"],
102 [arm*], [ARCHTYPE="arm"],
103 [aarch64], [ARCHTYPE="aarch64"],
104 [mips*], [ARCHTYPE="mips"],
105 [tile*], [ARCHTYPE="tile"],
106 [hppa*], [ARCHTYPE="hppa"],
107 [ARCHTYPE="unknown"]
108 )
109
110 AS_CASE([$host],[*-*-linux-androideabi],
111 [AM_CONDITIONAL(TARGET_IS_ANDROID, true)],
112 [AM_CONDITIONAL(TARGET_IS_ANDROID, false)]
113 )
114
115 AC_SUBST(ARCHTYPE)
116 AC_SUBST(SUBARCHTYPE)
117
118 UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
119 ARCHSRC=urcu/arch/$ARCHTYPE.h
120
121 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
122 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
123 ])
124
125 AS_IF([test "$host_cpu" = "armv7l"],[
126 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
127 ])
128
129 # ARM-specific checks
130 AS_IF([test "x$ARCHTYPE" = "xarm"],[
131 AC_MSG_CHECKING([for dmb instruction])
132 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
133 int main()
134 {
135 asm volatile("dmb":::"memory");
136 return 0;
137 }
138 ]])
139 ],[
140 AC_MSG_RESULT([yes])
141 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
142 ],[
143 AC_MSG_RESULT([no])
144 ])
145 ])
146
147 # Tile-specific checks
148 AS_IF([echo "$host_cpu" | grep "^tile"],[
149 AC_MSG_CHECKING([for Tile architecture type])
150 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
151 #ifndef __tilegx__
152 #error
153 #endif
154 ]])
155 ],[
156 AC_MSG_RESULT([ok])
157 ],[
158 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
159 ])
160 ])
161
162 # x86-specific checks
163 AS_IF([test "x$ARCHTYPE" = "xx86"],[
164 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
165 #For now, using lock; addl compatibility mode even for i686, because the
166 #Pentium III is seen as a i686, but lacks mfence instruction.
167 #Only using fence for x86_64.
168 #
169 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
170 #variant but lacks fence instructions.
171 AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om"],[
172 AC_MSG_RESULT([yes])
173 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
174 ],[
175 AC_MSG_RESULT([no])
176 ])
177 ])
178
179 # Check if sys_futex() is available
180 AC_MSG_CHECKING([for sys_futex()])
181 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
182 #include <sys/syscall.h>
183 #ifndef __NR_futex
184 #error "futexes not available"
185 #endif
186 ]])
187 ],[
188 AC_MSG_RESULT([yes])
189 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
190 compat_futex_test=0
191 ],[
192 AC_MSG_RESULT([no])
193 compat_futex_test=1
194 ])
195
196 # Check for pthread
197 AC_CHECK_LIB([pthread], [pthread_create],
198 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
199 [AC_CHECK_LIB([c], [pthread_create],
200 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
201 [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its location.])]
202 )]
203 )
204
205 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
206 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
207 AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
208
209 # smp-support configure option
210 AC_ARG_ENABLE([smp-support],
211 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
212 [def_smp_support=$enableval],
213 [def_smp_support="yes"])
214 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
215
216
217 # From the sched_setaffinity(2)'s man page:
218 # ~~~~
219 # The CPU affinity system calls were introduced in Linux kernel 2.5.8.
220 # The library interfaces were introduced in glibc 2.3. Initially, the
221 # glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
222 # the cpuset size argument was removed, but this argument was
223 # restored in glibc 2.3.4.
224 # ~~~~
225
226 # In addition to that, some vendors ported the system call to 2.4
227 # kernels.
228
229 # Furthermore, when the function first appeared, the MASK argument was
230 # an unsigned long pointer, while later it was made into a cpu_set_t
231 # pointer. Systems that have the cpu_set_t version also should have
232 # the CPU_ZERO, CPU_SET, etc. macros.
233
234 # All this mess means we have to cater for at least 3 different
235 # sched_setaffinity prototypes:
236
237 # ~~~~
238 # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
239 # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
240 # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
241 # ~~~~
242
243 # Since we define _GNU_SOURCE in the sources, must do so too in the
244 # autoconf tests, as defining _GNU_SOURCE or not exposes
245 # sched_setaffinity bits differently.
246 saved_CFLAGS=$CFLAGS
247 CFLAGS="$CFLAGS -D_GNU_SOURCE"
248
249 AC_CHECK_TYPES([cpu_set_t],
250 [have_cpu_set_t="yes"],
251 [have_cpu_set_t="no"],
252 [#include <sched.h>])
253
254 # Confirm that we have CPU_ZERO, and it actually works.
255 AC_MSG_CHECKING([whether CPU_ZERO works])
256 AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
257 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
258 #define _GNU_SOURCE
259 #include <sched.h>
260 int main()
261 {
262 cpu_set_t foo; CPU_ZERO(&foo);
263 return 0;
264 }
265 ]])
266 ],[
267 AC_DEFINE(HAVE_CPU_ZERO, 1)
268 AC_MSG_RESULT([yes])
269 ],[
270 AC_MSG_RESULT([no])
271 ])
272
273 # Confirm that we have CPU_SET, and it actually works.
274 AC_MSG_CHECKING([whether CPU_SET works])
275 AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
276 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
277 #define _GNU_SOURCE
278 #include <sched.h>
279 int main()
280 {
281 cpu_set_t foo, mask; CPU_SET(0, &foo);
282 return 0;
283 }
284 ]])
285 ],[
286 AC_DEFINE(HAVE_CPU_SET, 1)
287 AC_MSG_RESULT([yes])
288 ],[
289 AC_MSG_RESULT([no])
290 ])
291
292 # First check if the function is available at all.
293 AC_CHECK_FUNCS([sched_setaffinity],[
294 # Okay, we have it. Check if also have cpu_set_t. If we don't,
295 # then we have the first version using unsigned long, and no
296 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
297 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
298 # should also be present, but we confirm nonetheless.
299
300 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
301 # We do have it.
302 # Check how many arguments does sched_setaffinity take.
303 # Should be 3 or 2.
304 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
305 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
306 #include <sched.h>
307 int main()
308 {
309 cpu_set_t foo;
310 sched_setaffinity(0, sizeof (foo), &foo);
311 return 0;
312 }
313 ]])
314 ],
315 [sched_set_affinity_args=3],
316 [sched_set_affinity_args=2])
317 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
318 $sched_set_affinity_args,
319 [Defined to sched_setaffinity's number of arguments.])
320 AC_MSG_RESULT([$sched_set_affinity_args])
321 ],[
322 # No cpu_set_t, always 3 args.
323 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
324 ])
325 ])
326
327 CFLAGS=$saved_CFLAGS
328
329 AC_CONFIG_LINKS([
330 urcu/arch.h:$ARCHSRC
331 urcu/uatomic.h:$UATOMICSRC
332 ])
333 AC_CONFIG_FILES([
334 Makefile
335 doc/Makefile
336 doc/examples/Makefile
337 tests/Makefile
338 tests/common/Makefile
339 tests/unit/Makefile
340 tests/benchmark/Makefile
341 tests/regression/Makefile
342 tests/regression/regression_tests
343 tests/utils/Makefile
344 liburcu.pc
345 liburcu-bp.pc
346 liburcu-cds.pc
347 liburcu-qsbr.pc
348 liburcu-mb.pc
349 liburcu-signal.pc
350 ])
351 AC_OUTPUT
352
353 # Report on selected configure options
354 AS_IF([test "x$def_smp_support" = "xyes"],[
355 AS_ECHO("SMP support enabled.")
356 ],[
357 AS_ECHO("SMP support disabled.")
358 ])
359
360 AS_IF([test "x$def_tls_detect" = "x"],[
361 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
362 ],[
363 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
364 ])
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