Configure: add missing check for funcs: memset, strerror
[urcu.git] / configure.ac
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1# -*- Autoconf -*-
2# Process this file with autoconf to produce a configure script.
3
4
ca617caf 5AC_INIT([userspace-rcu],[0.8.0],[mathieu dot desnoyers at efficios dot com])
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6
7# Following the numbering scheme proposed by libtool for the library version
8# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
45e60038 9AC_SUBST([URCU_LIBRARY_VERSION], [3:0:0])
98bc124a 10
48d848c7 11AC_CONFIG_AUX_DIR([config])
a6412536 12AC_CONFIG_MACRO_DIR([config])
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13AC_CANONICAL_TARGET
14AC_CANONICAL_HOST
48d848c7 15AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
35eb2d6c 16AM_MAINTAINER_MODE([enable])
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17m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
18
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19m4_include([config/ax_tls.m4])
20
48d848c7 21AC_CONFIG_SRCDIR([urcu.h])
7d413817 22
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23AC_CONFIG_HEADERS([config.h urcu/config.h])
24
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25AH_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.])
26AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
27AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
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28AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
29AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
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30AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
31
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32# Allow overriding storage used for TLS variables.
33AC_ARG_ENABLE([compiler-tls],
34 AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
35 [def_compiler_tls=$enableval],
36 [def_compiler_tls="yes"])
37
38# If not overridden, use ax_tls.m4 to check if TLS is available.
39AS_IF([test "x$def_compiler_tls" = "xyes"],
40 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
41 [:])
42
43AS_IF([test "x$def_tls_detect" = "x"],
44 [:],
45 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
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46
47# Checks for programs.
48AC_PROG_CC
49AC_PROG_MAKE_SET
b14a378a 50LT_INIT
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51
52# Checks for typedefs, structures, and compiler characteristics.
53AC_C_INLINE
54AC_TYPE_PID_T
55AC_TYPE_SIZE_T
56
57# Checks for library functions.
58AC_FUNC_MALLOC
59AC_FUNC_MMAP
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60AC_CHECK_FUNCS(
61 [bzero gettimeofday munmap sched_getcpu strtoul sysconf gettid memeset strerror]
62)
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63
64# Find arch type
58e9f838 65AS_CASE([$host_cpu],
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66 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
67 [i486], [ARCHTYPE="x86"],
68 [i586], [ARCHTYPE="x86"],
69 [i686], [ARCHTYPE="x86"],
70 [amd64], [ARCHTYPE="x86"],
71 [x86_64], [ARCHTYPE="x86"],
72 [powerpc], [ARCHTYPE="ppc"],
73 [ppc64], [ARCHTYPE="ppc"],
74 [powerpc64], [ARCHTYPE="ppc"],
3913336f 75 [powerpc64le], [ARCHTYPE="gcc"],
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76 [ppc], [ARCHTYPE="ppc"],
77 [s390], [ARCHTYPE="s390"],
78 [s390x], [ARCHTYPE="s390"],
171ff3a3 79 [sparc], [ARCHTYPE="sparc64"],
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80 [sparc64], [ARCHTYPE="sparc64"],
81 [alpha*], [ARCHTYPE="alpha"],
82 [ia64], [ARCHTYPE="gcc"],
83 [arm*], [ARCHTYPE="arm"],
3913336f 84 [aarch64], [ARCHTYPE="gcc"],
e1259cb1 85 [mips*], [ARCHTYPE="mips"],
274773cf 86 [tile*], [ARCHTYPE="gcc"],
13e0bc72 87 [hppa*], [ARCHTYPE="hppa"],
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88 [ARCHTYPE="unknown"]
89)
91b0650a 90
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91AS_CASE([$host],[*-*-linux-androideabi],
92 [AM_CONDITIONAL(TARGET_IS_ANDROID, true)],
93 [AM_CONDITIONAL(TARGET_IS_ANDROID, false)]
94)
95
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96AC_SUBST(ARCHTYPE)
97AC_SUBST(SUBARCHTYPE)
5e626e0e 98
a2e7bf9c 99UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
1b9119f8 100ARCHSRC=urcu/arch/$ARCHTYPE.h
455b809a 101
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102AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
103 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
104])
105
58e9f838 106AS_IF([test "$host_cpu" = "armv7l"],[
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107 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
108])
48d848c7 109
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110# ARM-specific checks
111AS_IF([test "x$ARCHTYPE" = "xarm"],[
112 AC_MSG_CHECKING([for dmb instruction])
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113 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
114 int main()
115 {
116 asm volatile("dmb":::"memory");
117 return 0;
118 }
119 ]])
120 ],[
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121 AC_MSG_RESULT([yes])
122 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
123 ],[
124 AC_MSG_RESULT([no])
125 ])
126])
127
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128# Tile-specific checks
129AS_IF([echo "$host_cpu" | grep "^tile"],[
130 AC_MSG_CHECKING([for Tile architecture type])
131 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
132 #ifndef __tilegx__
133 #error
134 #endif
135 ]])
136 ],[
137 AC_MSG_RESULT([ok])
138 ],[
139 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.])
140 ])
141])
142
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143# x86-specific checks
144AS_IF([test "x$ARCHTYPE" = "xx86"],[
145 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
146 #For now, using lock; addl compatibility mode even for i686, because the
147 #Pentium III is seen as a i686, but lacks mfence instruction.
148 #Only using fence for x86_64.
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149 #
150 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
151 #variant but lacks fence instructions.
152 AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om"],[
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153 AC_MSG_RESULT([yes])
154 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
155 ],[
156 AC_MSG_RESULT([no])
157 ])
158])
159
160# Check if sys_futex() is available
161AC_MSG_CHECKING([for sys_futex()])
fe0707ab 162AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 163 #include <sys/syscall.h>
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164 #ifndef __NR_futex
165 #error "futexes not available"
166 #endif
fe0707ab 167 ]])
a6412536 168],[
0854ccff 169 AC_MSG_RESULT([yes])
02be5561 170 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
0854ccff 171 compat_futex_test=0
91b0650a 172],[
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173 AC_MSG_RESULT([no])
174 compat_futex_test=1
91b0650a 175])
0854ccff 176
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177# Check for pthread
178AC_CHECK_LIB([pthread], [pthread_create],
179 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
180 [AC_CHECK_LIB([c], [pthread_create],
181 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
182 [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its location.])]
183 )]
184)
185
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186AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
187AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
2f49a496 188AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
0854ccff 189
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190# smp-support configure option
191AC_ARG_ENABLE([smp-support],
192 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
193 [def_smp_support=$enableval],
194 [def_smp_support="yes"])
195AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
7d413817 196
48d848c7 197
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198# From the sched_setaffinity(2)'s man page:
199# ~~~~
200# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
201# The library interfaces were introduced in glibc 2.3. Initially, the
202# glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
203# the cpuset size argument was removed, but this argument was
204# restored in glibc 2.3.4.
205# ~~~~
206
207# In addition to that, some vendors ported the system call to 2.4
208# kernels.
209
210# Furthermore, when the function first appeared, the MASK argument was
211# an unsigned long pointer, while later it was made into a cpu_set_t
212# pointer. Systems that have the cpu_set_t version also should have
213# the CPU_ZERO, CPU_SET, etc. macros.
214
215# All this mess means we have to cater for at least 3 different
216# sched_setaffinity prototypes:
217
218# ~~~~
219# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
220# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
221# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
222# ~~~~
223
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224# Since we define _GNU_SOURCE in the sources, must do so too in the
225# autoconf tests, as defining _GNU_SOURCE or not exposes
226# sched_setaffinity bits differently.
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227saved_CFLAGS=$CFLAGS
228CFLAGS="$CFLAGS -D_GNU_SOURCE"
229
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230AC_CHECK_TYPES([cpu_set_t],
231 [have_cpu_set_t="yes"],
232 [have_cpu_set_t="no"],
233 [#include <sched.h>])
234
235# Confirm that we have CPU_ZERO, and it actually works.
236AC_MSG_CHECKING([whether CPU_ZERO works])
237AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
238AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
239 #define _GNU_SOURCE
240 #include <sched.h>
241 int main()
242 {
243 cpu_set_t foo; CPU_ZERO(&foo);
244 return 0;
245 }
246 ]])
247],[
248 AC_DEFINE(HAVE_CPU_ZERO, 1)
249 AC_MSG_RESULT([yes])
250],[
251 AC_MSG_RESULT([no])
252])
253
254# Confirm that we have CPU_SET, and it actually works.
255AC_MSG_CHECKING([whether CPU_SET works])
256AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
257AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
258 #define _GNU_SOURCE
259 #include <sched.h>
260 int main()
261 {
262 cpu_set_t foo, mask; CPU_SET(0, &foo);
263 return 0;
264 }
265 ]])
266],[
267 AC_DEFINE(HAVE_CPU_SET, 1)
268 AC_MSG_RESULT([yes])
269],[
270 AC_MSG_RESULT([no])
271])
272
d8540fc5 273# First check if the function is available at all.
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274AC_CHECK_FUNCS([sched_setaffinity],[
275 # Okay, we have it. Check if also have cpu_set_t. If we don't,
276 # then we have the first version using unsigned long, and no
277 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
278 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
279 # should also be present, but we confirm nonetheless.
280
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281 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
282 # We do have it.
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283 # Check how many arguments does sched_setaffinity take.
284 # Should be 3 or 2.
285 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
ec5e2d14 286 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 287 #include <sched.h>
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288 int main()
289 {
290 cpu_set_t foo;
b3231c17 291 sched_setaffinity(0, sizeof (foo), &foo);
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292 return 0;
293 }
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294 ]])
295 ],
296 [sched_set_affinity_args=3],
297 [sched_set_affinity_args=2])
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298 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
299 $sched_set_affinity_args,
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300 [Defined to sched_setaffinity's number of arguments.])
301 AC_MSG_RESULT([$sched_set_affinity_args])
302 ],[
303 # No cpu_set_t, always 3 args.
304 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
b3231c17 305 ])
a6412536 306])
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307
308CFLAGS=$saved_CFLAGS
309
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310AC_CONFIG_LINKS([
311 urcu/arch.h:$ARCHSRC
a2e7bf9c 312 urcu/uatomic.h:$UATOMICSRC
455b809a 313])
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314AC_CONFIG_FILES([
315 Makefile
fe999c05 316 doc/Makefile
8bad63a0 317 doc/examples/Makefile
48d848c7 318 tests/Makefile
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319 tests/common/Makefile
320 tests/unit/Makefile
321 tests/benchmark/Makefile
322 tests/regression/Makefile
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323 liburcu.pc
324 liburcu-bp.pc
a6412536 325 liburcu-cds.pc
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326 liburcu-qsbr.pc
327 liburcu-mb.pc
328 liburcu-signal.pc
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329])
330AC_OUTPUT
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331
332# Report on selected configure options
333AS_IF([test "x$def_smp_support" = "xyes"],[
334 AS_ECHO("SMP support enabled.")
335],[
336 AS_ECHO("SMP support disabled.")
337])
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338
339AS_IF([test "x$def_tls_detect" = "x"],[
340 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
341],[
342 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
343])
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