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