Fix: use clock_get_time for caa_get_cycles fallback on MacOSX
[urcu.git] / configure.ac
CommitLineData
074c3a1b 1AC_PREREQ(2.59)
1ef91570 2AC_INIT([userspace-rcu],[0.9.0],[mathieu dot desnoyers at efficios dot com], [], [http://liburcu.org/])
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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
69c9a8c0 6AC_SUBST([URCU_LIBRARY_VERSION], [4:0:0])
98bc124a 7
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8AC_CONFIG_SRCDIR([urcu.h])
9AC_CONFIG_HEADERS([config.h urcu/config.h])
48d848c7 10AC_CONFIG_AUX_DIR([config])
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11AC_CONFIG_MACRO_DIR([m4])
12
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13AC_CANONICAL_TARGET
14AC_CANONICAL_HOST
074c3a1b 15
48d848c7 16AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
35eb2d6c 17AM_MAINTAINER_MODE([enable])
7d413817 18
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19# Enable silent rules if available (Introduced in AM 1.11)
20m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
e72596d1 21
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22AH_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.])
23AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
24AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
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25AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
26AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
a767fdc3 27AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
a0307b90 28AH_TEMPLATE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [clock_gettime() is detected.])
a767fdc3 29
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30# Allow overriding storage used for TLS variables.
31AC_ARG_ENABLE([compiler-tls],
32 AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
33 [def_compiler_tls=$enableval],
34 [def_compiler_tls="yes"])
35
36# If not overridden, use ax_tls.m4 to check if TLS is available.
37AS_IF([test "x$def_compiler_tls" = "xyes"],
38 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
39 [:])
40
41AS_IF([test "x$def_tls_detect" = "x"],
42 [:],
43 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
48d848c7 44
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45# Checks for C compiler
46AC_USE_SYSTEM_EXTENSIONS
48d848c7 47AC_PROG_CC
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48AC_PROG_CC_STDC
49
50# Checks for programs.
27d5e306 51AC_PROG_AWK
48d848c7 52AC_PROG_MAKE_SET
074c3a1b 53AC_CHECK_PROGS(NPROC, [nproc gnproc])
b14a378a 54LT_INIT
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55
56# Checks for typedefs, structures, and compiler characteristics.
57AC_C_INLINE
58AC_TYPE_PID_T
59AC_TYPE_SIZE_T
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60AC_TYPE_SSIZE_T
61AC_TYPE_UINT16_T
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62AC_TYPE_INT32_T
63AC_TYPE_UINT32_T
64AC_TYPE_UINT64_T
65AC_TYPE_UINT8_T
48d848c7 66
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67AX_C___ATTRIBUTE__
68AS_IF([test "x$ax_cv___attribute__" = "xyes"],
69 [:],
70 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
71
72AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
73LIBS="$PTHREAD_LIBS $LIBS"
74CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
75CC="$PTHREAD_CC"
76
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77# Checks for library functions.
78AC_FUNC_MALLOC
79AC_FUNC_MMAP
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80AC_FUNC_FORK
81AC_CHECK_FUNCS([ \
82 atexit \
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83 getcpuid \
84 gettid \
85 gettimeofday \
86 memeset \
87 memset \
88 munmap \
89 sched_getcpu \
90 strerror \
91 strtoul \
92 sysconf \
93])
48d848c7 94
bb6afa9a 95# Check for headers
7dea28e7 96AC_HEADER_STDBOOL
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97AC_CHECK_HEADERS([ \
98 limits.h \
99 stddef.h \
100 sys/param.h \
101 sys/time.h \
102])
bb6afa9a 103
48d848c7 104# Find arch type
58e9f838 105AS_CASE([$host_cpu],
52fe6e60 106 [k1om], [ARCHTYPE="x86"],
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107 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
108 [i486], [ARCHTYPE="x86"],
109 [i586], [ARCHTYPE="x86"],
110 [i686], [ARCHTYPE="x86"],
111 [amd64], [ARCHTYPE="x86"],
112 [x86_64], [ARCHTYPE="x86"],
113 [powerpc], [ARCHTYPE="ppc"],
114 [ppc64], [ARCHTYPE="ppc"],
115 [powerpc64], [ARCHTYPE="ppc"],
61126bd9 116 [powerpc64le], [ARCHTYPE="ppc"],
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117 [ppc], [ARCHTYPE="ppc"],
118 [s390], [ARCHTYPE="s390"],
119 [s390x], [ARCHTYPE="s390"],
171ff3a3 120 [sparc], [ARCHTYPE="sparc64"],
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121 [sparc64], [ARCHTYPE="sparc64"],
122 [alpha*], [ARCHTYPE="alpha"],
c21a8d01 123 [ia64], [ARCHTYPE="ia64"],
a6412536 124 [arm*], [ARCHTYPE="arm"],
d1c67842 125 [aarch64*], [ARCHTYPE="aarch64"],
e1259cb1 126 [mips*], [ARCHTYPE="mips"],
859050b3 127 [nios2*], [ARCHTYPE="nios2"],
c23069c6 128 [tile*], [ARCHTYPE="tile"],
13e0bc72 129 [hppa*], [ARCHTYPE="hppa"],
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130 [ARCHTYPE="unknown"]
131)
91b0650a 132
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133AS_CASE([$host],[*-*-linux-androideabi],
134 [AM_CONDITIONAL(TARGET_IS_ANDROID, true)],
135 [AM_CONDITIONAL(TARGET_IS_ANDROID, false)]
136)
137
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138AS_CASE([$host],[*-cygwin*],
139 [AM_CONDITIONAL(USE_CYGWIN, true)],
140 [AM_CONDITIONAL(USE_CYGWIN, false)]
141)
142
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143AC_SUBST(ARCHTYPE)
144AC_SUBST(SUBARCHTYPE)
5e626e0e 145
a2e7bf9c 146UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
1b9119f8 147ARCHSRC=urcu/arch/$ARCHTYPE.h
455b809a 148
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149AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
150 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
151])
152
58e9f838 153AS_IF([test "$host_cpu" = "armv7l"],[
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154 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
155])
48d848c7 156
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157# ARM-specific checks
158AS_IF([test "x$ARCHTYPE" = "xarm"],[
159 AC_MSG_CHECKING([for dmb instruction])
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160 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
161 int main()
162 {
163 asm volatile("dmb":::"memory");
164 return 0;
165 }
166 ]])
167 ],[
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168 AC_MSG_RESULT([yes])
169 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
170 ],[
171 AC_MSG_RESULT([no])
172 ])
173])
174
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175# Tile-specific checks
176AS_IF([echo "$host_cpu" | grep "^tile"],[
177 AC_MSG_CHECKING([for Tile architecture type])
178 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
179 #ifndef __tilegx__
180 #error
181 #endif
182 ]])
183 ],[
184 AC_MSG_RESULT([ok])
185 ],[
186 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.])
187 ])
188])
189
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190# x86-specific checks
191AS_IF([test "x$ARCHTYPE" = "xx86"],[
192 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
193 #For now, using lock; addl compatibility mode even for i686, because the
194 #Pentium III is seen as a i686, but lacks mfence instruction.
195 #Only using fence for x86_64.
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196 #
197 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
198 #variant but lacks fence instructions.
52fe6e60 199 AS_IF([test "x$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$host_cpu" != "xk1om"],[
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200 AC_MSG_RESULT([yes])
201 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
202 ],[
203 AC_MSG_RESULT([no])
204 ])
205])
206
207# Check if sys_futex() is available
208AC_MSG_CHECKING([for sys_futex()])
fe0707ab 209AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 210 #include <sys/syscall.h>
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211 #ifndef __NR_futex
212 #error "futexes not available"
213 #endif
fe0707ab 214 ]])
a6412536 215],[
0854ccff 216 AC_MSG_RESULT([yes])
02be5561 217 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
0854ccff 218 compat_futex_test=0
91b0650a 219],[
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220 AC_MSG_RESULT([no])
221 compat_futex_test=1
91b0650a 222])
0854ccff 223
8be0fb5f 224# Search for clock_gettime
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225AC_SEARCH_LIBS([clock_gettime], [rt], [
226 AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
227], [])
8be0fb5f 228
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229# Check for pthread
230AC_CHECK_LIB([pthread], [pthread_create],
231 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
232 [AC_CHECK_LIB([c], [pthread_create],
233 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
234 [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its location.])]
235 )]
236)
237
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238AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
239AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
2f49a496 240AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
0854ccff 241
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242# smp-support configure option
243AC_ARG_ENABLE([smp-support],
244 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
245 [def_smp_support=$enableval],
246 [def_smp_support="yes"])
247AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
7d413817 248
48d848c7 249
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250# From the sched_setaffinity(2)'s man page:
251# ~~~~
252# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
253# The library interfaces were introduced in glibc 2.3. Initially, the
254# glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
255# the cpuset size argument was removed, but this argument was
256# restored in glibc 2.3.4.
257# ~~~~
258
259# In addition to that, some vendors ported the system call to 2.4
260# kernels.
261
262# Furthermore, when the function first appeared, the MASK argument was
263# an unsigned long pointer, while later it was made into a cpu_set_t
264# pointer. Systems that have the cpu_set_t version also should have
265# the CPU_ZERO, CPU_SET, etc. macros.
266
267# All this mess means we have to cater for at least 3 different
268# sched_setaffinity prototypes:
269
270# ~~~~
271# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
272# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
273# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
274# ~~~~
275
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276# Since we define _GNU_SOURCE in the sources, must do so too in the
277# autoconf tests, as defining _GNU_SOURCE or not exposes
278# sched_setaffinity bits differently.
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279saved_CFLAGS=$CFLAGS
280CFLAGS="$CFLAGS -D_GNU_SOURCE"
281
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282AC_CHECK_TYPES([cpu_set_t],
283 [have_cpu_set_t="yes"],
284 [have_cpu_set_t="no"],
285 [#include <sched.h>])
286
287# Confirm that we have CPU_ZERO, and it actually works.
288AC_MSG_CHECKING([whether CPU_ZERO works])
289AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
290AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
291 #define _GNU_SOURCE
292 #include <sched.h>
293 int main()
294 {
295 cpu_set_t foo; CPU_ZERO(&foo);
296 return 0;
297 }
298 ]])
299],[
300 AC_DEFINE(HAVE_CPU_ZERO, 1)
301 AC_MSG_RESULT([yes])
302],[
303 AC_MSG_RESULT([no])
304])
305
306# Confirm that we have CPU_SET, and it actually works.
307AC_MSG_CHECKING([whether CPU_SET works])
308AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
309AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
310 #define _GNU_SOURCE
311 #include <sched.h>
312 int main()
313 {
314 cpu_set_t foo, mask; CPU_SET(0, &foo);
315 return 0;
316 }
317 ]])
318],[
319 AC_DEFINE(HAVE_CPU_SET, 1)
320 AC_MSG_RESULT([yes])
321],[
322 AC_MSG_RESULT([no])
323])
324
d8540fc5 325# First check if the function is available at all.
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326AC_CHECK_FUNCS([sched_setaffinity],[
327 # Okay, we have it. Check if also have cpu_set_t. If we don't,
328 # then we have the first version using unsigned long, and no
329 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
330 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
331 # should also be present, but we confirm nonetheless.
332
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333 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
334 # We do have it.
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335 # Check how many arguments does sched_setaffinity take.
336 # Should be 3 or 2.
337 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
ec5e2d14 338 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 339 #include <sched.h>
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340 int main()
341 {
342 cpu_set_t foo;
b3231c17 343 sched_setaffinity(0, sizeof (foo), &foo);
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344 return 0;
345 }
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346 ]])
347 ],
348 [sched_set_affinity_args=3],
349 [sched_set_affinity_args=2])
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350 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
351 $sched_set_affinity_args,
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352 [Defined to sched_setaffinity's number of arguments.])
353 AC_MSG_RESULT([$sched_set_affinity_args])
354 ],[
355 # No cpu_set_t, always 3 args.
356 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
b3231c17 357 ])
a6412536 358])
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359
360CFLAGS=$saved_CFLAGS
361
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362AC_CONFIG_LINKS([
363 urcu/arch.h:$ARCHSRC
a2e7bf9c 364 urcu/uatomic.h:$UATOMICSRC
455b809a 365])
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366AC_CONFIG_FILES([
367 Makefile
fe999c05 368 doc/Makefile
8bad63a0 369 doc/examples/Makefile
48d848c7 370 tests/Makefile
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371 tests/common/Makefile
372 tests/unit/Makefile
373 tests/benchmark/Makefile
374 tests/regression/Makefile
074c3a1b 375 tests/regression/regression_tests
1b387491 376 tests/utils/Makefile
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377 liburcu.pc
378 liburcu-bp.pc
a6412536 379 liburcu-cds.pc
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380 liburcu-qsbr.pc
381 liburcu-mb.pc
382 liburcu-signal.pc
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383])
384AC_OUTPUT
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385
386# Report on selected configure options
387AS_IF([test "x$def_smp_support" = "xyes"],[
388 AS_ECHO("SMP support enabled.")
389],[
390 AS_ECHO("SMP support disabled.")
391])
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392
393AS_IF([test "x$def_tls_detect" = "x"],[
394 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
395],[
396 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
397])
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