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([$host],
  54   [*-cygwin* | *-msys*], [LT_NO_UNDEFINED="-no-undefined"]
  55 )
  56
  57
  58 ##                   ##
  59 ## C compiler checks ##
  60 ##                   ##
  61
  62 # Choose the C compiler
  63 AC_PROG_CC
  64 # AC_PROG_CC_STDC was merged in AC_PROG_CC in autoconf 2.70
  65 m4_version_prereq([2.70], [], [AC_PROG_CC_STDC])
  66
  67 # Make sure the C compiler supports C99
  68 AS_IF([test "$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 ##                     ##
  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