Fix: workqueue: remove unused variable "ret"
[urcu.git] / configure.ac
1 dnl SPDX-License-Identifier: LGPL-2.1-only
2 dnl
3 dnl Copyright (C) 2021 EfficiOS, Inc.
4 dnl
5 dnl Process this file with autoconf to produce a configure script.
6
7 # Project version information
8 m4_define([urcu_version_major], [0])
9 m4_define([urcu_version_minor], [14])
10 m4_define([urcu_version_patch], [0])
11 m4_define([urcu_version_dev_stage], [-pre])
12 m4_define([urcu_version], urcu_version_major[.]urcu_version_minor[.]urcu_version_patch[]urcu_version_dev_stage)
13
14 # Library version information of "liburcu"
15 # Following the numbering scheme proposed by libtool for the library version
16 # http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
17 m4_define([urcu_lib_version_current], [9])
18 m4_define([urcu_lib_version_revision], [0])
19 m4_define([urcu_lib_version_age], [1])
20 m4_define([urcu_lib_version], urcu_lib_version_current[:]urcu_lib_version_revision[:]urcu_lib_version_age)
21
22
23 ## ##
24 ## Autoconf base setup ##
25 ## ##
26
27 AC_PREREQ([2.69])
28 AC_INIT([userspace-rcu],[urcu_version],[mathieu dot desnoyers at efficios dot com],[],[http://liburcu.org/])
29
30 AC_CONFIG_HEADERS([include/config.h include/urcu/config.h])
31 AC_CONFIG_AUX_DIR([config])
32 AC_CONFIG_MACRO_DIR([m4])
33
34 AC_CANONICAL_TARGET
35 AC_CANONICAL_HOST
36
37
38 ## ##
39 ## Automake base setup ##
40 ## ##
41
42 AM_INIT_AUTOMAKE([1.12 foreign dist-bzip2 no-dist-gzip nostdinc -Wall -Wno-portability -Werror])
43 AM_MAINTAINER_MODE([enable])
44
45 # Enable silent rules by default
46 AM_SILENT_RULES([yes])
47
48
49 ## ##
50 ## OS and Arch specific defaults ##
51 ## ##
52
53 AS_CASE([$host],
54 [*-cygwin*], [LT_NO_UNDEFINED="-no-undefined"]
55 )
56
57
58 ## ##
59 ## C compiler checks ##
60 ## ##
61
62 # Choose the C compiler
63 AC_PROG_CC
64 # AC_PROG_CC_STDC was merged in AC_PROG_CC in autoconf 2.70
65 m4_version_prereq([2.70], [], [AC_PROG_CC_STDC])
66
67 # Make sure the C compiler supports C99
68 AS_IF([test "$ac_cv_prog_cc_c99" = "no"], [AC_MSG_ERROR([The compiler does not support C99])])
69
70 # Enable available system extensions and LFS support
71 AC_USE_SYSTEM_EXTENSIONS
72 AC_SYS_LARGEFILE
73
74 ## ##
75 ## C++ compiler checks ##
76 ## ##
77
78 # Require a C++11 compiler without GNU extensions (-std=c++11)
79 AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory])
80
81 # Make sure the C compiler supports __attribute__
82 AX_C___ATTRIBUTE__
83 AS_IF([test "x$ax_cv___attribute__" != "xyes"],
84 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
85
86 # Make sure we have pthread support
87 AX_PTHREAD([], [AC_MSG_ERROR([Could not configure pthread support])])
88
89 # Checks for typedefs, structures, and compiler characteristics.
90 AC_C_INLINE
91 AC_C_TYPEOF
92 AC_TYPE_INT32_T
93 AC_TYPE_PID_T
94 AC_TYPE_SIZE_T
95 AC_TYPE_SSIZE_T
96 AC_TYPE_UINT16_T
97 AC_TYPE_UINT32_T
98 AC_TYPE_UINT64_T
99 AC_TYPE_UINT8_T
100
101 # Detect warning flags supported by the C compiler and append them to
102 # WARN_CFLAGS.
103 m4_define([WARN_FLAGS_LIST], [ dnl
104 -Wall dnl
105 -Wextra dnl
106 -Wmissing-prototypes dnl
107 -Wmissing-declarations dnl
108 -Wnull-dereference dnl
109 -Wundef dnl
110 -Wshadow dnl
111 -Wjump-misses-init dnl
112 -Wsuggest-attribute=format dnl
113 -Wtautological-constant-out-of-range-compare dnl
114 -Wnested-externs dnl
115 -Wwrite-strings dnl
116 -Wformat=2 dnl
117 -Wstrict-aliasing dnl
118 -Wmissing-noreturn dnl
119 -Winit-self dnl
120 -Wduplicated-cond dnl
121 -Wduplicated-branches dnl
122 -Wlogical-op dnl
123 dnl
124 dnl-Wredundant-decls dnl
125 -Wno-null-dereference dnl
126 ])
127
128 # Pass -Werror as an extra flag during the test: this is needed to make the
129 # -Wunknown-warning-option diagnostic fatal with clang.
130 AC_LANG_PUSH([C])
131 AX_APPEND_COMPILE_FLAGS([WARN_FLAGS_LIST], [WARN_CFLAGS], [-Werror])
132 AC_LANG_POP([C])
133
134 AC_LANG_PUSH([C++])
135 AX_APPEND_COMPILE_FLAGS([WARN_FLAGS_LIST], [WARN_CXXFLAGS], [-Werror])
136 AC_LANG_POP([C++])
137
138 AE_IF_FEATURE_ENABLED([Werror], [WARN_CFLAGS="${WARN_CFLAGS} -Werror"])
139 AE_IF_FEATURE_ENABLED([Werror], [WARN_CXXFLAGS="${WARN_CXXFLAGS} -Werror"])
140
141
142 ## ##
143 ## Header checks ##
144 ## ##
145
146 AC_HEADER_STDBOOL
147 AC_CHECK_HEADERS([ \
148 limits.h \
149 stddef.h \
150 sys/param.h \
151 sys/time.h \
152 ])
153
154
155 ## ##
156 ## Programs checks ##
157 ## ##
158
159 AC_PROG_AWK
160 AC_PROG_GREP
161 AC_PROG_MAKE_SET
162 AC_CHECK_PROGS(NPROC, [nproc gnproc])
163 AC_CHECK_PROGS(GETCONF, [getconf])
164 AC_CHECK_PROGS(TIME, [time])
165
166 # Initialize and configure libtool
167 LT_INIT
168
169
170 ## ##
171 ## Library checks ##
172 ## ##
173
174 # Checks for library functions.
175 AC_FUNC_MMAP
176 AC_FUNC_FORK
177 AC_CHECK_FUNCS([ \
178 atexit \
179 getcpuid \
180 gettid \
181 gettimeofday \
182 memeset \
183 memset \
184 munmap \
185 rand_r \
186 sched_getcpu \
187 sched_setaffinity \
188 strerror \
189 strtoul \
190 sysconf \
191 ])
192
193 # AC_FUNC_MALLOC causes problems when cross-compiling.
194 #AC_FUNC_MALLOC
195
196 # Search for clock_gettime() in -lrt
197 AC_SEARCH_LIBS([clock_gettime], [rt], [
198 AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1], [clock_gettime() is detected.])
199 ])
200
201
202 ## ##
203 ## Optional features selection ##
204 ## ##
205
206 # Allow to fallback to FIXME if the membarrier syscall is unavailable on the
207 # running kernel, when disabled, abort if the syscall is unavailable. Applies
208 # to default and bulletproof flavors.
209 # Enabled by default
210 AE_FEATURE_DEFAULT_ENABLE
211 AE_FEATURE([sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.])
212
213 # Use compiler Thread Local Storage, when disabled use pthread_getspecific() to emulate TLS.
214 # Enabled by default
215 AE_FEATURE_DEFAULT_ENABLE
216 AE_FEATURE([compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.])
217
218 # smp-support configure option
219 # Enabled by default
220 AE_FEATURE_DEFAULT_ENABLE
221 AE_FEATURE([smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems.])
222
223 # RCU debugging option
224 # Disabled by default
225 AE_FEATURE_DEFAULT_DISABLE
226 AE_FEATURE([rcu-debug], [Enable internal debugging self-checks. Introduces a performance penalty.])
227
228 # rculfhash iterator debugging
229 # Disabled by default
230 AE_FEATURE_DEFAULT_DISABLE
231 AE_FEATURE([cds-lfht-iter-debug], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.])
232
233 # When given, add -Werror to WARN_CFLAGS and WARN_CXXFLAGS.
234 # Disabled by default
235 AE_FEATURE_DEFAULT_DISABLE
236 AE_FEATURE([Werror],[Treat compiler warnings as errors.])
237
238 ## ##
239 ## Set defines for optional features conditionnals in the source code ##
240 ## ##
241
242 AE_IF_FEATURE_DISABLED([sys-membarrier-fallback], [
243 AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1], [Require the operating system to support the membarrier system call for default and bulletproof flavors.])
244 ])
245
246 AE_IF_FEATURE_ENABLED([compiler-tls], [
247 AC_DEFINE([CONFIG_RCU_TLS], [1], [Use compiler provided Thread Local Storage.])
248 ])
249
250 AE_IF_FEATURE_ENABLED([smp-support], [
251 AC_DEFINE([CONFIG_RCU_SMP], [1], [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.])
252 ])
253
254 AE_IF_FEATURE_ENABLED([rcu-debug], [
255 AC_DEFINE([CONFIG_RCU_DEBUG], [1], [Enable internal debugging self-checks. Introduces a performance penalty.])
256 ])
257
258 AE_IF_FEATURE_ENABLED([cds-lfht-iter-debug], [
259 AC_DEFINE([CONFIG_CDS_LFHT_ITER_DEBUG], [1], [Enable extra debugging checks for lock-free hash table iterator traversal. Alters the rculfhash ABI. Make sure to compile both library and application with matching configuration.])
260 ])
261
262
263 ## ##
264 ## Set automake variables for optional feature conditionnals in Makefile.am ##
265 ## ##
266
267 # Building the examples requires the shared libraries to be enabled
268 AM_CONDITIONAL([ENABLE_EXAMPLES], AE_IS_FEATURE_ENABLED([shared]))
269
270
271 ## ##
272 ## Substitute variables for use in Makefile.am ##
273 ## ##
274
275 # Library versions for libtool
276 AC_SUBST([URCU_LIBRARY_VERSION], [urcu_lib_version])
277
278 AC_SUBST(LT_NO_UNDEFINED)
279
280 # The order in which the include folders are searched is important.
281 # The top_builddir should always be searched first in the event that a build
282 # time generated file is included.
283 AM_CPPFLAGS="-I\$(top_builddir)/include -I\$(top_srcdir)/include -include config.h"
284 AC_SUBST(AM_CPPFLAGS)
285
286 AM_CFLAGS="$WARN_CFLAGS $PTHREAD_CFLAGS"
287 AC_SUBST(AM_CFLAGS)
288
289 AM_CXXFLAGS="$WARN_CXXFLAGS $PTHREAD_CFLAGS"
290 AC_SUBST(AM_CXXFLAGS)
291
292
293 ## ##
294 ## Output files generated by configure ##
295 ## ##
296
297 AC_CONFIG_FILES([
298 Makefile
299 doc/Makefile
300 doc/examples/Makefile
301 extras/Makefile
302 include/Makefile
303 src/Makefile
304 tests/Makefile
305 tests/common/Makefile
306 tests/unit/Makefile
307 tests/benchmark/Makefile
308 tests/regression/Makefile
309 tests/utils/Makefile
310 src/liburcu.pc
311 src/liburcu-bp.pc
312 src/liburcu-cds.pc
313 src/liburcu-qsbr.pc
314 src/liburcu-mb.pc
315 src/liburcu-memb.pc
316 src/liburcu-signal.pc
317 ])
318
319 AC_CONFIG_FILES([tests/utils/env.sh],[chmod +x tests/utils/env.sh])
320
321
322 AC_OUTPUT
323
324 #
325 # Mini-report on what will be built.
326 #
327
328 PPRINT_INIT
329 PPRINT_SET_INDENT(1)
330 PPRINT_SET_TS(38)
331
332 AS_ECHO
333 AS_ECHO("${PPRINT_COLOR_BLDBLU}Userspace-RCU $PACKAGE_VERSION${PPRINT_COLOR_RST}")
334 AS_ECHO
335
336 PPRINT_SUBTITLE([Features])
337
338 PPRINT_PROP_STRING([Target architecture], $host_cpu)
339
340 # SMP support enabled/disabled
341 AE_IS_FEATURE_ENABLED([smp-support]) && value=1 || value=0
342 PPRINT_PROP_BOOL([SMP support], $value)
343
344 # TLS
345 AE_IS_FEATURE_ENABLED([compiler-tls]) && value="compiler TLS" || value="pthread_getspecific()"
346 PPRINT_PROP_STRING([Thread Local Storage (TLS)], [$value])
347
348 # clock_gettime() available
349 test "x$ac_cv_search_function_clock_gettime" != "xno" && value=1 || value=0
350 PPRINT_PROP_BOOL([clock_gettime()], $value)
351
352 # Require membarrier
353 AE_IS_FEATURE_ENABLED([sys-membarrier-fallback]) && value=0 || value=1
354 PPRINT_PROP_BOOL([Require membarrier], $value)
355
356 # RCU debug enabled/disabled
357 AE_IS_FEATURE_ENABLED([rcu-debug]) && value=1 || value=0
358 PPRINT_PROP_BOOL([Internal debugging], $value)
359
360 # rculfhash iterator debug enabled/disabled
361 AE_IS_FEATURE_ENABLED([cds-lfht-iter-debug]) && value=1 || value=0
362 PPRINT_PROP_BOOL([Lock-free HT iterator debugging], $value)
363
364 PPRINT_PROP_BOOL([Multi-flavor support], 1)
365
366 report_bindir="`eval eval echo $bindir`"
367 report_libdir="`eval eval echo $libdir`"
368
369 # Print the bindir and libdir this 'make install' will install into.
370 AS_ECHO
371 PPRINT_SUBTITLE([Install directories])
372 PPRINT_PROP_STRING([Binaries], [$report_bindir])
373 PPRINT_PROP_STRING([Libraries], [$report_libdir])
374
This page took 0.055369 seconds and 4 git commands to generate.