configure.ac

   1 AC_PREREQ(2.59)
   2 AC_INIT([userspace-rcu],[0.10.0-pre],[mathieu dot desnoyers at efficios dot com], [], [http://liburcu.org/])
   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
   6 AC_SUBST([URCU_LIBRARY_VERSION], [5:0:1])
   7
   8 AC_CONFIG_HEADERS([include/config.h include/urcu/config.h])
   9 AC_CONFIG_AUX_DIR([config])
  10 AC_CONFIG_MACRO_DIR([m4])
  11
  12 AC_CANONICAL_TARGET
  13 AC_CANONICAL_HOST
  14
  15 AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip nostdinc])
  16 AM_MAINTAINER_MODE([enable])
  17
  18 # Enable silent rules if available (Introduced in AM 1.11)
  19 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  20
  21 AH_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.])
  22 AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
  23 AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
  24 AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
  25 AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
  26 AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
  27 AH_TEMPLATE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [clock_gettime() is detected.])
  28 AH_TEMPLATE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [Require the operating system to support the membarrier system call for default and bulletproof flavors.])
  29 AH_TEMPLATE([CONFIG_RCU_DEBUG], [Enable internal debugging self-checks. Introduce performance penalty.])
  30
  31 # Allow requiring the operating system to support the membarrier system
  32 # call. Applies to default and bulletproof flavors.
  33 AC_ARG_ENABLE([sys-membarrier-fallback],
  34         AS_HELP_STRING([--disable-sys-membarrier-fallback], [Abort if sys-membarrier is needed but not available rather than using a fallback.]),
  35         [def_sys_membarrier_fallback=$enableval],
  36         [def_sys_membarrier_fallback="yes"])
  37 AS_IF([test "x$def_sys_membarrier_fallback" != "xyes"], [AC_DEFINE([CONFIG_RCU_FORCE_SYS_MEMBARRIER], [1])])
  38
  39 # Allow overriding storage used for TLS variables.
  40 AC_ARG_ENABLE([compiler-tls],
  41         AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
  42         [def_compiler_tls=$enableval],
  43         [def_compiler_tls="yes"])
  44
  45 # If not overridden, use ax_tls.m4 to check if TLS is available.
  46 AS_IF([test "x$def_compiler_tls" = "xyes"],
  47         [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
  48         [:])
  49
  50 AS_IF([test "x$def_tls_detect" = "x"],
  51         [:],
  52         [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
  53
  54 # Checks for C compiler
  55 AC_USE_SYSTEM_EXTENSIONS
  56 AC_PROG_CC
  57 AC_PROG_CC_STDC
  58
  59 # Checks for programs.
  60 AC_PROG_AWK
  61 AC_PROG_MAKE_SET
  62 AC_CHECK_PROGS(NPROC, [nproc gnproc])
  63 AC_CHECK_PROGS(GETCONF, [getconf])
  64 AS_IF([test "x$NPROC" != "x"],
  65         [NPROC_CMD=$NPROC],
  66         [AS_IF([test "x$GETCONF" != "x"],
  67                 [NPROC_CMD="$GETCONF _NPROCESSORS_ONLN"],
  68                 [NPROC_CMD="echo 1"]
  69         )]
  70 )
  71 AC_SUBST([NPROC_CMD], [$NPROC_CMD])
  72
  73 LT_INIT
  74
  75 # Checks for typedefs, structures, and compiler characteristics.
  76 AC_C_INLINE
  77 AC_TYPE_PID_T
  78 AC_TYPE_SIZE_T
  79 AC_TYPE_SSIZE_T
  80 AC_TYPE_UINT16_T
  81 AC_TYPE_INT32_T
  82 AC_TYPE_UINT32_T
  83 AC_TYPE_UINT64_T
  84 AC_TYPE_UINT8_T
  85
  86 AX_C___ATTRIBUTE__
  87 AS_IF([test "x$ax_cv___attribute__" = "xyes"],
  88         [:],
  89         [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
  90
  91 AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
  92 LIBS="$PTHREAD_LIBS $LIBS"
  93 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
  94 CC="$PTHREAD_CC"
  95
  96 # Checks for library functions.
  97 AC_FUNC_MMAP
  98 AC_FUNC_FORK
  99 AC_CHECK_FUNCS([ \
 100         atexit \
 101         getcpuid \
 102         gettid \
 103         gettimeofday \
 104         memeset \
 105         memset \
 106         munmap \
 107         rand_r \
 108         sched_getcpu \
 109         strerror \
 110         strtoul \
 111         sysconf \
 112 ])
 113
 114 # AC_FUNC_MALLOC causes problems when cross-compiling.
 115 #AC_FUNC_MALLOC
 116
 117 # Check for headers
 118 AC_HEADER_STDBOOL
 119 AC_CHECK_HEADERS([ \
 120         limits.h \
 121         stddef.h \
 122         sys/param.h \
 123         sys/time.h \
 124 ])
 125
 126 # Find arch type
 127 AS_CASE([$host_cpu],
 128         [k1om], [ARCHTYPE="x86"],
 129         [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
 130         [i486], [ARCHTYPE="x86"],
 131         [i586], [ARCHTYPE="x86"],
 132         [i686], [ARCHTYPE="x86"],
 133         [amd64], [ARCHTYPE="x86"],
 134         [x86_64], [ARCHTYPE="x86"],
 135         [powerpc], [ARCHTYPE="ppc"],
 136         [ppc64], [ARCHTYPE="ppc"],
 137         [powerpc64], [ARCHTYPE="ppc"],
 138         [powerpc64le], [ARCHTYPE="ppc"],
 139         [ppc], [ARCHTYPE="ppc"],
 140         [s390], [ARCHTYPE="s390"],
 141         [s390x], [ARCHTYPE="s390"],
 142         [sparc], [ARCHTYPE="sparc64"],
 143         [sparc64], [ARCHTYPE="sparc64"],
 144         [alpha*], [ARCHTYPE="alpha"],
 145         [ia64], [ARCHTYPE="ia64"],
 146         [arm*], [ARCHTYPE="arm"],
 147         [aarch64*], [ARCHTYPE="aarch64"],
 148         [mips*], [ARCHTYPE="mips"],
 149         [nios2*], [ARCHTYPE="nios2"],
 150         [tile*], [ARCHTYPE="tile"],
 151         [hppa*], [ARCHTYPE="hppa"],
 152         [ARCHTYPE="unknown"]
 153 )
 154
 155 AS_CASE([$host],[*-cygwin*],
 156         [AM_CONDITIONAL(USE_CYGWIN, true)],
 157         [AM_CONDITIONAL(USE_CYGWIN, false)]
 158 )
 159
 160 AC_SUBST(ARCHTYPE)
 161 AC_SUBST(SUBARCHTYPE)
 162
 163 UATOMICSRC=include/urcu/uatomic/$ARCHTYPE.h
 164 ARCHSRC=include/urcu/arch/$ARCHTYPE.h
 165
 166 AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
 167         AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
 168 ])
 169
 170 AS_IF([test "$host_cpu" = "armv7l"],[
 171         CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
 172 ])
 173
 174 # ARM-specific checks
 175 AS_IF([test "x$ARCHTYPE" = "xarm"],[
 176         AC_MSG_CHECKING([for dmb instruction])
 177         AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 178                                 int main()
 179                                 {
 180                                         asm volatile("dmb":::"memory");
 181                                         return 0;
 182                                 }
 183                 ]])
 184         ],[
 185                 AC_MSG_RESULT([yes])
 186                 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
 187         ],[
 188                 AC_MSG_RESULT([no])
 189         ])
 190 ])
 191
 192 # Tile-specific checks
 193 AS_IF([echo "$host_cpu" | grep "^tile"],[
 194         AC_MSG_CHECKING([for Tile architecture type])
 195         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 196                                 #ifndef __tilegx__
 197                                 #error
 198                                 #endif
 199                 ]])
 200         ],[
 201                 AC_MSG_RESULT([ok])
 202         ],[
 203                 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
 204         ])
 205 ])
 206
 207 # x86-specific checks
 208 AS_IF([test "x$ARCHTYPE" = "xx86"],[
 209         AC_MSG_CHECKING([if architecture really supports the mfence instruction])
 210         #For now, using lock; addl compatibility mode even for i686, because the
 211         #Pentium III is seen as a i686, but lacks mfence instruction.
 212         #Only using fence for x86_64.
 213         #
 214         #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
 215         #variant but lacks fence instructions.
 216         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"],[
 217                 AC_MSG_RESULT([yes])
 218                 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
 219         ],[
 220                 AC_MSG_RESULT([no])
 221         ])
 222 ])
 223
 224 # Check if sys_futex() is available
 225 AC_MSG_CHECKING([for sys_futex()])
 226 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 227                 #include <sys/syscall.h>
 228                 #ifndef __NR_futex
 229                 #error "futexes not available"
 230                 #endif
 231         ]])
 232 ],[
 233         AC_MSG_RESULT([yes])
 234         AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
 235         compat_futex_test=0
 236 ],[
 237         AC_MSG_RESULT([no])
 238         compat_futex_test=1
 239 ])
 240
 241 # Search for clock_gettime
 242 AC_SEARCH_LIBS([clock_gettime], [rt], [
 243         AC_DEFINE([CONFIG_RCU_HAVE_CLOCK_GETTIME], [1])
 244 ], [])
 245
 246 AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
 247 AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
 248 AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
 249
 250 # smp-support configure option
 251 AC_ARG_ENABLE([smp-support],
 252         AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
 253         [def_smp_support=$enableval],
 254         [def_smp_support="yes"])
 255 AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
 256
 257 # RCU debugging option
 258 AC_ARG_ENABLE([rcu-debug],
 259       AS_HELP_STRING([--enable-rcu-debug], [Enable internal debugging
 260                       self-checks. Introduce performance penalty.]))
 261 AS_IF([test "x$enable_rcu_debug" = "xyes"], [
 262        AC_DEFINE([CONFIG_RCU_DEBUG], [1])
 263 ])
 264
 265 # From the sched_setaffinity(2)'s man page:
 266 # ~~~~
 267 # The CPU affinity system calls were introduced in Linux kernel 2.5.8.
 268 # The library interfaces were introduced in glibc 2.3.  Initially, the
 269 # glibc interfaces included a cpusetsize argument.  In glibc 2.3.3,
 270 # the cpuset size argument was removed, but this argument was
 271 # restored in glibc 2.3.4.
 272 # ~~~~
 273
 274 # In addition to that, some vendors ported the system call to 2.4
 275 # kernels.
 276
 277 # Furthermore, when the function first appeared, the MASK argument was
 278 # an unsigned long pointer, while later it was made into a cpu_set_t
 279 # pointer.  Systems that have the cpu_set_t version also should have
 280 # the CPU_ZERO, CPU_SET, etc. macros.
 281
 282 # All this mess means we have to cater for at least 3 different
 283 # sched_setaffinity prototypes:
 284
 285 # ~~~~
 286 #  int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
 287 #  int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
 288 #  int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
 289 # ~~~~
 290
 291 AC_CHECK_TYPES([cpu_set_t],
 292         [have_cpu_set_t="yes"],
 293         [have_cpu_set_t="no"],
 294         [#include <sched.h>])
 295
 296 # Confirm that we have CPU_ZERO, and it actually works.
 297 AC_MSG_CHECKING([whether CPU_ZERO works])
 298 AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
 299 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 300                 #include <sched.h>
 301                 int main()
 302                 {
 303                         cpu_set_t foo; CPU_ZERO(&foo);
 304                         return 0;
 305                 }
 306         ]])
 307 ],[
 308         AC_DEFINE(HAVE_CPU_ZERO, 1)
 309         AC_MSG_RESULT([yes])
 310 ],[
 311         AC_MSG_RESULT([no])
 312 ])
 313
 314 # Confirm that we have CPU_SET, and it actually works.
 315 AC_MSG_CHECKING([whether CPU_SET works])
 316 AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
 317 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 318                 #include <sched.h>
 319                 int main()
 320                 {
 321                         cpu_set_t foo, mask; CPU_SET(0, &foo);
 322                         return 0;
 323                 }
 324         ]])
 325 ],[
 326         AC_DEFINE(HAVE_CPU_SET, 1)
 327         AC_MSG_RESULT([yes])
 328 ],[
 329         AC_MSG_RESULT([no])
 330 ])
 331
 332 # First check if the function is available at all.
 333 AC_CHECK_FUNCS([sched_setaffinity],[
 334         # Okay, we have it.  Check if also have cpu_set_t.  If we don't,
 335         # then we have the first version using unsigned long, and no
 336         # CPU_ZERO, etc. macros.  If we do have cpu_set_t, we may have the
 337         # version with 2 or 3 arguments.  In that case, CPU_ZERO, etc.,
 338         # should also be present, but we confirm nonetheless.
 339
 340         AS_IF([test "x$have_cpu_set_t" = "xyes"], [
 341                 # We do have it.
 342                 # Check how many arguments does sched_setaffinity take.
 343                 # Should be 3 or 2.
 344                 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
 345                 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 346                                 #include <sched.h>
 347                                 int main()
 348                                 {
 349                                         cpu_set_t foo;
 350                                         sched_setaffinity(0, sizeof (foo), &foo);
 351                                         return 0;
 352                                 }
 353                         ]])
 354                 ],
 355                 [sched_set_affinity_args=3],
 356                 [sched_set_affinity_args=2])
 357                 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
 358                         $sched_set_affinity_args,
 359                         [Defined to sched_setaffinity's number of arguments.])
 360                 AC_MSG_RESULT([$sched_set_affinity_args])
 361         ],[
 362                 # No cpu_set_t, always 3 args.
 363                 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
 364         ])
 365 ])
 366
 367 DEFAULT_INCLUDES="-include config.h"
 368 AC_SUBST(DEFAULT_INCLUDES)
 369
 370 AC_CONFIG_LINKS([
 371         include/urcu/arch.h:$ARCHSRC
 372         include/urcu/uatomic.h:$UATOMICSRC
 373 ])
 374 AC_CONFIG_FILES([
 375         Makefile
 376         doc/Makefile
 377         doc/examples/Makefile
 378         include/Makefile
 379         src/Makefile
 380         tests/Makefile
 381         tests/common/Makefile
 382         tests/unit/Makefile
 383         tests/benchmark/Makefile
 384         tests/regression/Makefile
 385         tests/regression/regression_tests
 386         tests/utils/Makefile
 387         src/liburcu.pc
 388         src/liburcu-bp.pc
 389         src/liburcu-cds.pc
 390         src/liburcu-qsbr.pc
 391         src/liburcu-mb.pc
 392         src/liburcu-signal.pc
 393 ])
 394 AC_OUTPUT
 395
 396 # Report on selected configure options
 397 AS_IF([test "x$def_smp_support" = "xyes"],[
 398         AS_ECHO("SMP support enabled.")
 399 ],[
 400         AS_ECHO("SMP support disabled.")
 401 ])
 402
 403 AS_IF([test "x$def_tls_detect" = "x"],[
 404         AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
 405 ],[
 406         AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
 407 ])