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], [15]) 10 m4_define([urcu_version_patch], [0]) 11 m4_define([urcu_version_dev_stage], []) 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([$host], 54 [*-cygwin* | *-msys*], [LT_NO_UNDEFINED="-no-undefined"] 55 ) 56 57 58 ## ## 59 ## C compiler checks ## 60 ## ## 61 62 # Choose the C compiler 63 AC_PROG_CC 64 # AC_PROG_CC_STDC was merged in AC_PROG_CC in autoconf 2.70 65 m4_version_prereq([2.70], [], [AC_PROG_CC_STDC]) 66 67 # Make sure the C compiler supports C99 68 AS_IF([test "$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 # Check if the selected C compiler supports atomic builtins 75 AE_CC_ATOMIC_BUILTINS 76 77 78 ## ## 79 ## C++ compiler checks ## 80 ## ## 81 82 # Require a C++11 compiler without GNU extensions (-std=c++11) 83 AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory]) 84 85 # Make sure the C compiler supports __attribute__ 86 AX_C___ATTRIBUTE__ 87 AS_IF([test "x$ax_cv___attribute__" != "xyes"], 88 [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])]) 89 90 # Make sure we have pthread support 91 AX_PTHREAD([], [AC_MSG_ERROR([Could not configure pthread support])]) 92 93 # Checks for typedefs, structures, and compiler characteristics. 94 AC_C_INLINE 95 AC_C_TYPEOF 96 AC_TYPE_INT32_T 97 AC_TYPE_PID_T 98 AC_TYPE_SIZE_T 99 AC_TYPE_SSIZE_T 100 AC_TYPE_UINT16_T 101 AC_TYPE_UINT32_T 102 AC_TYPE_UINT64_T 103 AC_TYPE_UINT8_T 104 105 # Detect warning flags supported by the C compiler and append them to 106 # WARN_CFLAGS. 107 m4_define([WARN_FLAGS_LIST], [ dnl 108 -Wall dnl 109 -Wextra dnl 110 -Wmissing-prototypes dnl 111 -Wmissing-declarations dnl 112 -Wnull-dereference dnl 113 -Wundef dnl 114 -Wshadow dnl 115 -Wjump-misses-init dnl 116 -Wsuggest-attribute=format dnl 117 -Wtautological-constant-out-of-range-compare dnl 118 -Wnested-externs dnl 119 -Wwrite-strings dnl 120 -Wformat=2 dnl 121 -Wstrict-aliasing dnl 122 -Wmissing-noreturn dnl 123 -Winit-self dnl 124 -Wduplicated-cond dnl 125 -Wduplicated-branches dnl 126 -Wlogical-op dnl 127 dnl 128 dnl-Wredundant-decls dnl 129 -Wno-null-dereference dnl 130 ]) 131 132 # Pass -Werror as an extra flag during the test: this is needed to make the 133 # -Wunknown-warning-option diagnostic fatal with clang. 134 AC_LANG_PUSH([C]) 135 AX_APPEND_COMPILE_FLAGS([WARN_FLAGS_LIST], [WARN_CFLAGS], [-Werror]) 136 AC_LANG_POP([C]) 137 138 AC_LANG_PUSH([C++]) 139 AX_APPEND_COMPILE_FLAGS([WARN_FLAGS_LIST], [WARN_CXXFLAGS], [-Werror]) 140 AC_LANG_POP([C++]) 141 142 AE_IF_FEATURE_ENABLED([Werror], [WARN_CFLAGS="${WARN_CFLAGS} -Werror"]) 143 AE_IF_FEATURE_ENABLED([Werror], [WARN_CXXFLAGS="${WARN_CXXFLAGS} -Werror"]) 144 145 146 ## ## 147 ## Header checks ## 148 ## ## 149 150 AC_HEADER_STDBOOL 151 AC_CHECK_HEADERS([ \ 152 limits.h \ 153 stddef.h \ 154 sys/param.h \ 155 sys/time.h \ 156 ]) 157 158 159 ## ## 160 ## Programs checks ## 161 ## ## 162 163 AC_PROG_AWK 164 AC_PROG_GREP 165 AC_PROG_MAKE_SET 166 AC_CHECK_PROGS(NPROC, [nproc gnproc]) 167 AC_CHECK_PROGS(GETCONF, [getconf]) 168 AC_CHECK_PROGS(TIME, [time]) 169 170 # Initialize and configure libtool 171 LT_INIT 172 173 174 ## ## 175 ## Library checks ## 176 ## ## 177 178 # Checks for library functions. 179 AC_FUNC_MMAP 180 AC_FUNC_FORK 181 AC_CHECK_FUNCS([ \ 182 atexit \ 183 getcpuid \ 184 gettid \ 185 gettimeofday \ 186 memeset \ 187 memset \ 188 munmap \ 189 rand_r \ 190 sched_getcpu \ 191 sched_setaffinity \ 192 strerror \ 193 strtoul \ 194 sysconf \ 195 ]) 196 197 # AC_FUNC_MALLOC causes problems when cross-compiling. 198 #AC_FUNC_MALLOC 199 200 # Search for clock_gettime() in -lrt 201 AC_SEARCH_LIBS([clock_gettime], [rt], [ 202 AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1], [clock_gettime() is detected.]) 203 ]) 204 205 206 ## ## 207 ## Optional features selection ## 208 ## ## 209 210 # Allow to fallback to FIXME if the membarrier syscall is unavailable on the 211 # running kernel, when disabled, abort if the syscall is unavailable. Applies 212 # to default and bulletproof flavors. 213 # Enabled by default 214 AE_FEATURE_DEFAULT_ENABLE 215 AE_FEATURE([sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.]) 216 217 # Use compiler Thread Local Storage, when disabled use pthread_getspecific() to emulate TLS. 218 # Enabled by default 219 AE_FEATURE_DEFAULT_ENABLE 220 AE_FEATURE([compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]) 221 222 # smp-support configure option 223 # Enabled by default 224 AE_FEATURE_DEFAULT_ENABLE 225 AE_FEATURE([smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems.]) 226 227 # RCU debugging option 228 # Disabled by default 229 AE_FEATURE_DEFAULT_DISABLE 230 AE_FEATURE([rcu-debug], [Enable internal debugging self-checks. Introduces a performance penalty.]) 231 232 # rculfhash iterator debugging 233 # Disabled by default 234 AE_FEATURE_DEFAULT_DISABLE 235 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.]) 236 237 # Use compiler atomic builtins, when disabled use our legacy uatomic implementation. 238 # Disabled by default 239 AE_FEATURE_DEFAULT_DISABLE 240 AE_FEATURE([compiler-atomic-builtins], [Enable the use of compiler atomic builtins.]) 241 242 # emit legacy memory barriers 243 # Enable by default 244 AE_FEATURE_DEFAULT_ENABLE 245 AE_FEATURE([legacy-mb], [Disable legacy memory barriers.]) 246 247 # When given, add -Werror to WARN_CFLAGS and WARN_CXXFLAGS. 248 # Disabled by default 249 AE_FEATURE_DEFAULT_DISABLE 250 AE_FEATURE([Werror],[Treat compiler warnings as errors.]) 251 252 ## ## 253 ## Set defines for optional features conditionnals in the source code ## 254 ## ## 255 256 AE_IF_FEATURE_DISABLED([sys-membarrier-fallback], [ 257 AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1], [Require the operating system to support the membarrier system call for default and bulletproof flavors.]) 258 ]) 259 260 AE_IF_FEATURE_ENABLED([compiler-tls], [ 261 AC_DEFINE([CONFIG_RCU_TLS], [1], [Use compiler provided Thread Local Storage.]) 262 ]) 263 264 AE_IF_FEATURE_ENABLED([smp-support], [ 265 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.]) 266 ]) 267 268 AE_IF_FEATURE_ENABLED([rcu-debug], [ 269 AC_DEFINE([CONFIG_RCU_DEBUG], [1], [Enable internal debugging self-checks. Introduces a performance penalty.]) 270 ]) 271 272 AE_IF_FEATURE_ENABLED([cds-lfht-iter-debug], [ 273 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.]) 274 ]) 275 276 AE_IF_FEATURE_ENABLED([compiler-atomic-builtins], [ 277 AC_DEFINE([CONFIG_RCU_USE_ATOMIC_BUILTINS], [1], [Use compiler atomic builtins.]) 278 ]) 279 280 AE_IF_FEATURE_ENABLED([legacy-mb], [ 281 AC_DEFINE([CONFIG_RCU_EMIT_LEGACY_MB], [1], [Emit legacy memory barriers that were documented in the APIs.]) 282 ]) 283 284 ## ## 285 ## Set automake variables for optional feature conditionnals in Makefile.am ## 286 ## ## 287 288 # Building the examples requires the shared libraries to be enabled 289 AM_CONDITIONAL([ENABLE_EXAMPLES], AE_IS_FEATURE_ENABLED([shared])) 290 291 292 ## ## 293 ## Check for optional features dependencies ## 294 ## ## 295 296 297 AE_IF_FEATURE_ENABLED([compiler-atomic-builtins], [ 298 AS_IF([test "x$ae_cv_cc_atomic_builtins" != xyes], [ 299 AC_MSG_ERROR([The compiler does not support atomic builtins.]) 300 ]) 301 ]) 302 303 ## ## 304 ## Substitute variables for use in Makefile.am ## 305 ## ## 306 307 # Library versions for libtool 308 AC_SUBST([URCU_LIBRARY_VERSION], [urcu_lib_version]) 309 310 AC_SUBST(LT_NO_UNDEFINED) 311 312 # The order in which the include folders are searched is important. 313 # The top_builddir should always be searched first in the event that a build 314 # time generated file is included. 315 AM_CPPFLAGS="-I\$(top_builddir)/include -I\$(top_srcdir)/include -include config.h" 316 AC_SUBST(AM_CPPFLAGS) 317 318 AM_CFLAGS="$WARN_CFLAGS $PTHREAD_CFLAGS" 319 AC_SUBST(AM_CFLAGS) 320 321 AM_CXXFLAGS="$WARN_CXXFLAGS $PTHREAD_CFLAGS" 322 AC_SUBST(AM_CXXFLAGS) 323 324 325 ## ## 326 ## Output files generated by configure ## 327 ## ## 328 329 AC_CONFIG_FILES([ 330 Makefile 331 doc/Makefile 332 doc/examples/Makefile 333 extras/Makefile 334 include/Makefile 335 src/Makefile 336 tests/Makefile 337 tests/common/Makefile 338 tests/unit/Makefile 339 tests/benchmark/Makefile 340 tests/regression/Makefile 341 tests/utils/Makefile 342 src/liburcu.pc 343 src/liburcu-bp.pc 344 src/liburcu-cds.pc 345 src/liburcu-qsbr.pc 346 src/liburcu-mb.pc 347 src/liburcu-memb.pc 348 ]) 349 350 AC_CONFIG_FILES([tests/utils/env.sh],[chmod +x tests/utils/env.sh]) 351 352 353 AC_OUTPUT 354 355 # 356 # Mini-report on what will be built. 357 # 358 359 AE_PPRINT_INIT 360 AE_PPRINT_SET_INDENT(1) 361 AE_PPRINT_SET_TS(38) 362 363 AS_ECHO 364 AS_ECHO("${AE_PPRINT_COLOR_BLDBLU}Userspace-RCU $PACKAGE_VERSION${AE_PPRINT_COLOR_RST}") 365 AS_ECHO 366 367 AE_PPRINT_SUBTITLE([Features]) 368 369 AE_PPRINT_PROP_STRING([Target architecture], $host_cpu) 370 371 # SMP support enabled/disabled 372 AE_IS_FEATURE_ENABLED([smp-support]) && value=1 || value=0 373 AE_PPRINT_PROP_BOOL([SMP support], $value) 374 375 # TLS 376 AE_IS_FEATURE_ENABLED([compiler-tls]) && value="compiler TLS" || value="pthread_getspecific()" 377 AE_PPRINT_PROP_STRING([Thread Local Storage (TLS)], [$value]) 378 379 # clock_gettime() available 380 test "x$ac_cv_search_function_clock_gettime" != "xno" && value=1 || value=0 381 AE_PPRINT_PROP_BOOL([clock_gettime()], $value) 382 383 # Require membarrier 384 AE_IS_FEATURE_ENABLED([sys-membarrier-fallback]) && value=0 || value=1 385 AE_PPRINT_PROP_BOOL([Require membarrier], $value) 386 387 # RCU debug enabled/disabled 388 AE_IS_FEATURE_ENABLED([rcu-debug]) && value=1 || value=0 389 AE_PPRINT_PROP_BOOL([Internal debugging], $value) 390 391 # rculfhash iterator debug enabled/disabled 392 AE_IS_FEATURE_ENABLED([cds-lfht-iter-debug]) && value=1 || value=0 393 AE_PPRINT_PROP_BOOL([Lock-free HT iterator debugging], $value) 394 395 AE_PPRINT_PROP_BOOL([Multi-flavor support], 1) 396 397 # atomic builtins enabled/disabled 398 AE_IS_FEATURE_ENABLED([compiler-atomic-builtins]) && value=1 || value=0 399 AE_PPRINT_PROP_BOOL([Use compiler atomic builtins], $value) 400 401 # legacy memory barriers 402 AE_IS_FEATURE_ENABLED([legacy-mb]) && value=1 || value=0 403 AE_PPRINT_PROP_BOOL([Emit legacy memory barriers], $value) 404 405 report_bindir="`eval eval echo $bindir`" 406 report_libdir="`eval eval echo $libdir`" 407 408 # Print the bindir and libdir this 'make install' will install into. 409 AS_ECHO 410 AE_PPRINT_SUBTITLE([Install directories]) 411 AE_PPRINT_PROP_STRING([Binaries], [$report_bindir]) 412 AE_PPRINT_PROP_STRING([Libraries], [$report_libdir]) 413 414
Indexes created Thu Apr 09 00:23:28 UTC 2026