Allow forcing the use of sys membarrier
[urcu.git] / configure.ac
CommitLineData
074c3a1b 1AC_PREREQ(2.59)
d5edb898 2AC_INIT([userspace-rcu],[0.10.0-pre],[mathieu dot desnoyers at efficios dot com], [], [http://liburcu.org/])
98bc124a
YB
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
9e5f4ff4 6AC_SUBST([URCU_LIBRARY_VERSION], [5:0:1])
98bc124a 7
6893800a 8AC_CONFIG_HEADERS([include/config.h include/urcu/config.h])
48d848c7 9AC_CONFIG_AUX_DIR([config])
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10AC_CONFIG_MACRO_DIR([m4])
11
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12AC_CANONICAL_TARGET
13AC_CANONICAL_HOST
074c3a1b 14
6893800a 15AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip nostdinc])
35eb2d6c 16AM_MAINTAINER_MODE([enable])
7d413817 17
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18# Enable silent rules if available (Introduced in AM 1.11)
19m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
e72596d1 20
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21AH_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.])
22AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
23AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
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24AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
25AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
a767fdc3 26AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
a0307b90 27AH_TEMPLATE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [clock_gettime() is detected.])
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28AH_TEMPLATE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [Require the operating system to support the membarrier system call for default and bulletproof flavors.])
29
30# Allow requiring the operating system to support the membarrier system
31# call. Applies to default and bulletproof flavors.
32AC_ARG_ENABLE([sys-membarrier-fallback],
33 AS_HELP_STRING([--disable-sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.]),
34 [def_sys_membarrier_fallback=$enableval],
35 [def_sys_membarrier_fallback="yes"])
36AS_IF([test "x$def_sys_membarrier_fallback" != "xyes"], [AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1])])
a767fdc3 37
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38# Allow overriding storage used for TLS variables.
39AC_ARG_ENABLE([compiler-tls],
40 AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
41 [def_compiler_tls=$enableval],
42 [def_compiler_tls="yes"])
43
44# If not overridden, use ax_tls.m4 to check if TLS is available.
45AS_IF([test "x$def_compiler_tls" = "xyes"],
46 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
47 [:])
48
49AS_IF([test "x$def_tls_detect" = "x"],
50 [:],
51 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
48d848c7 52
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53# Checks for C compiler
54AC_USE_SYSTEM_EXTENSIONS
48d848c7 55AC_PROG_CC
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56AC_PROG_CC_STDC
57
58# Checks for programs.
27d5e306 59AC_PROG_AWK
48d848c7 60AC_PROG_MAKE_SET
074c3a1b 61AC_CHECK_PROGS(NPROC, [nproc gnproc])
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62AC_CHECK_PROGS(GETCONF, [getconf])
63AS_IF([test "x$NPROC" != "x"],
64 [NPROC_CMD=$NPROC],
65 [AS_IF([test "x$GETCONF" != "x"],
66 [NPROC_CMD="$GETCONF _NPROCESSORS_ONLN"],
67 [NPROC_CMD="echo 1"]
68 )]
69)
70AC_SUBST([NPROC_CMD], [$NPROC_CMD])
71
b14a378a 72LT_INIT
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73
74# Checks for typedefs, structures, and compiler characteristics.
75AC_C_INLINE
76AC_TYPE_PID_T
77AC_TYPE_SIZE_T
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78AC_TYPE_SSIZE_T
79AC_TYPE_UINT16_T
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80AC_TYPE_INT32_T
81AC_TYPE_UINT32_T
82AC_TYPE_UINT64_T
83AC_TYPE_UINT8_T
48d848c7 84
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85AX_C___ATTRIBUTE__
86AS_IF([test "x$ax_cv___attribute__" = "xyes"],
87 [:],
88 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
89
90AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
91LIBS="$PTHREAD_LIBS $LIBS"
92CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
93CC="$PTHREAD_CC"
94
48d848c7 95# Checks for library functions.
48d848c7 96AC_FUNC_MMAP
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97AC_FUNC_FORK
98AC_CHECK_FUNCS([ \
99 atexit \
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100 getcpuid \
101 gettid \
102 gettimeofday \
103 memeset \
104 memset \
105 munmap \
3e4ae45a 106 rand_r \
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107 sched_getcpu \
108 strerror \
109 strtoul \
110 sysconf \
111])
48d848c7 112
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113# AC_FUNC_MALLOC causes problems when cross-compiling.
114#AC_FUNC_MALLOC
115
bb6afa9a 116# Check for headers
7dea28e7 117AC_HEADER_STDBOOL
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118AC_CHECK_HEADERS([ \
119 limits.h \
120 stddef.h \
121 sys/param.h \
122 sys/time.h \
123])
bb6afa9a 124
48d848c7 125# Find arch type
58e9f838 126AS_CASE([$host_cpu],
52fe6e60 127 [k1om], [ARCHTYPE="x86"],
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128 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
129 [i486], [ARCHTYPE="x86"],
130 [i586], [ARCHTYPE="x86"],
131 [i686], [ARCHTYPE="x86"],
132 [amd64], [ARCHTYPE="x86"],
133 [x86_64], [ARCHTYPE="x86"],
134 [powerpc], [ARCHTYPE="ppc"],
135 [ppc64], [ARCHTYPE="ppc"],
136 [powerpc64], [ARCHTYPE="ppc"],
61126bd9 137 [powerpc64le], [ARCHTYPE="ppc"],
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138 [ppc], [ARCHTYPE="ppc"],
139 [s390], [ARCHTYPE="s390"],
140 [s390x], [ARCHTYPE="s390"],
171ff3a3 141 [sparc], [ARCHTYPE="sparc64"],
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142 [sparc64], [ARCHTYPE="sparc64"],
143 [alpha*], [ARCHTYPE="alpha"],
c21a8d01 144 [ia64], [ARCHTYPE="ia64"],
a6412536 145 [arm*], [ARCHTYPE="arm"],
d1c67842 146 [aarch64*], [ARCHTYPE="aarch64"],
e1259cb1 147 [mips*], [ARCHTYPE="mips"],
859050b3 148 [nios2*], [ARCHTYPE="nios2"],
c23069c6 149 [tile*], [ARCHTYPE="tile"],
13e0bc72 150 [hppa*], [ARCHTYPE="hppa"],
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151 [ARCHTYPE="unknown"]
152)
91b0650a 153
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154AS_CASE([$host],[*-cygwin*],
155 [AM_CONDITIONAL(USE_CYGWIN, true)],
156 [AM_CONDITIONAL(USE_CYGWIN, false)]
157)
158
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159AC_SUBST(ARCHTYPE)
160AC_SUBST(SUBARCHTYPE)
5e626e0e 161
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162UATOMICSRC=include/urcu/uatomic/$ARCHTYPE.h
163ARCHSRC=include/urcu/arch/$ARCHTYPE.h
455b809a 164
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165AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
166 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
167])
168
58e9f838 169AS_IF([test "$host_cpu" = "armv7l"],[
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170 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
171])
48d848c7 172
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173# ARM-specific checks
174AS_IF([test "x$ARCHTYPE" = "xarm"],[
175 AC_MSG_CHECKING([for dmb instruction])
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176 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
177 int main()
178 {
179 asm volatile("dmb":::"memory");
180 return 0;
181 }
182 ]])
183 ],[
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184 AC_MSG_RESULT([yes])
185 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
186 ],[
187 AC_MSG_RESULT([no])
188 ])
189])
190
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191# Tile-specific checks
192AS_IF([echo "$host_cpu" | grep "^tile"],[
193 AC_MSG_CHECKING([for Tile architecture type])
194 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
195 #ifndef __tilegx__
196 #error
197 #endif
198 ]])
199 ],[
200 AC_MSG_RESULT([ok])
201 ],[
202 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
203 ])
204])
205
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206# x86-specific checks
207AS_IF([test "x$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.
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212 #
213 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
214 #variant but lacks fence instructions.
52fe6e60 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"],[
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216 AC_MSG_RESULT([yes])
217 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
218 ],[
219 AC_MSG_RESULT([no])
220 ])
221])
222
223# Check if sys_futex() is available
224AC_MSG_CHECKING([for sys_futex()])
fe0707ab 225AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 226 #include <sys/syscall.h>
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227 #ifndef __NR_futex
228 #error "futexes not available"
229 #endif
fe0707ab 230 ]])
a6412536 231],[
0854ccff 232 AC_MSG_RESULT([yes])
02be5561 233 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
0854ccff 234 compat_futex_test=0
91b0650a 235],[
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236 AC_MSG_RESULT([no])
237 compat_futex_test=1
91b0650a 238])
0854ccff 239
8be0fb5f 240# Search for clock_gettime
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241AC_SEARCH_LIBS([clock_gettime], [rt], [
242 AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
243], [])
8be0fb5f 244
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245AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
246AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
2f49a496 247AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
0854ccff 248
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249# smp-support configure option
250AC_ARG_ENABLE([smp-support],
251 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
252 [def_smp_support=$enableval],
253 [def_smp_support="yes"])
254AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
7d413817 255
48d848c7 256
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257# From the sched_setaffinity(2)'s man page:
258# ~~~~
259# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
260# The library interfaces were introduced in glibc 2.3. Initially, the
261# glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
262# the cpuset size argument was removed, but this argument was
263# restored in glibc 2.3.4.
264# ~~~~
265
266# In addition to that, some vendors ported the system call to 2.4
267# kernels.
268
269# Furthermore, when the function first appeared, the MASK argument was
270# an unsigned long pointer, while later it was made into a cpu_set_t
271# pointer. Systems that have the cpu_set_t version also should have
272# the CPU_ZERO, CPU_SET, etc. macros.
273
274# All this mess means we have to cater for at least 3 different
275# sched_setaffinity prototypes:
276
277# ~~~~
278# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
279# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
280# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
281# ~~~~
282
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283AC_CHECK_TYPES([cpu_set_t],
284 [have_cpu_set_t="yes"],
285 [have_cpu_set_t="no"],
286 [#include <sched.h>])
287
288# Confirm that we have CPU_ZERO, and it actually works.
289AC_MSG_CHECKING([whether CPU_ZERO works])
290AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
291AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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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([[
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310 #include <sched.h>
311 int main()
312 {
313 cpu_set_t foo, mask; CPU_SET(0, &foo);
314 return 0;
315 }
316 ]])
317],[
318 AC_DEFINE(HAVE_CPU_SET, 1)
319 AC_MSG_RESULT([yes])
320],[
321 AC_MSG_RESULT([no])
322])
323
d8540fc5 324# First check if the function is available at all.
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325AC_CHECK_FUNCS([sched_setaffinity],[
326 # Okay, we have it. Check if also have cpu_set_t. If we don't,
327 # then we have the first version using unsigned long, and no
328 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
329 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
330 # should also be present, but we confirm nonetheless.
331
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332 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
333 # We do have it.
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334 # Check how many arguments does sched_setaffinity take.
335 # Should be 3 or 2.
336 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
ec5e2d14 337 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 338 #include <sched.h>
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339 int main()
340 {
341 cpu_set_t foo;
b3231c17 342 sched_setaffinity(0, sizeof (foo), &foo);
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343 return 0;
344 }
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345 ]])
346 ],
347 [sched_set_affinity_args=3],
348 [sched_set_affinity_args=2])
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349 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
350 $sched_set_affinity_args,
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351 [Defined to sched_setaffinity's number of arguments.])
352 AC_MSG_RESULT([$sched_set_affinity_args])
353 ],[
354 # No cpu_set_t, always 3 args.
355 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
b3231c17 356 ])
a6412536 357])
d8540fc5 358
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359DEFAULT_INCLUDES="-include config.h"
360AC_SUBST(DEFAULT_INCLUDES)
d8540fc5 361
455b809a 362AC_CONFIG_LINKS([
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363 include/urcu/arch.h:$ARCHSRC
364 include/urcu/uatomic.h:$UATOMICSRC
455b809a 365])
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366AC_CONFIG_FILES([
367 Makefile
fe999c05 368 doc/Makefile
8bad63a0 369 doc/examples/Makefile
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370 include/Makefile
371 src/Makefile
48d848c7 372 tests/Makefile
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373 tests/common/Makefile
374 tests/unit/Makefile
375 tests/benchmark/Makefile
376 tests/regression/Makefile
074c3a1b 377 tests/regression/regression_tests
1b387491 378 tests/utils/Makefile
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379 src/liburcu.pc
380 src/liburcu-bp.pc
381 src/liburcu-cds.pc
382 src/liburcu-qsbr.pc
383 src/liburcu-mb.pc
384 src/liburcu-signal.pc
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385])
386AC_OUTPUT
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387
388# Report on selected configure options
389AS_IF([test "x$def_smp_support" = "xyes"],[
390 AS_ECHO("SMP support enabled.")
391],[
392 AS_ECHO("SMP support disabled.")
393])
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394
395AS_IF([test "x$def_tls_detect" = "x"],[
396 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
397],[
398 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
399])
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