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