configure.ac

   1 #
   2 # When this file changes, rerun autogen.sh.
   3 #
   4
   5 AC_PREREQ(2.59)
   6 AC_INIT([libdispatch], [1.2], [libdispatch@macosforge.org], [libdispatch])
   7 AC_REVISION([$$])
   8 AC_CONFIG_AUX_DIR(config)
   9 AC_CONFIG_HEADER([config/config.h])
  10 AC_CONFIG_MACRO_DIR([m4])
  11 ac_clean_files=a.out.dSYM
  12 AM_MAINTAINER_MODE
  13
  14 AC_PROG_CC([clang gcc cc])
  15 AC_PROG_CXX([clang++ g++ c++])
  16 AC_PROG_OBJC([clang gcc cc])
  17
  18 #
  19 # On Mac OS X, some required header files come from other source packages;
  20 # allow specifying where those are.
  21 #
  22 AC_ARG_WITH([apple-libc-source],
  23   [AS_HELP_STRING([--with-apple-libc-source],
  24     [Specify path to Apple Libc source])], [
  25   apple_libc_source_pthreads_path=${withval}/pthreads
  26   CPPFLAGS="$CPPFLAGS -I$apple_libc_source_pthreads_path"
  27 ])
  28
  29 AC_ARG_WITH([apple-libclosure-source],
  30   [AS_HELP_STRING([--with-apple-libclosure-source],
  31     [Specify path to Apple libclosure source])], [
  32   apple_libclosure_source_path=${withval}
  33   CPPFLAGS="$CPPFLAGS -I$apple_libclosure_source_path"
  34 ])
  35
  36 AC_ARG_WITH([apple-xnu-source],
  37   [AS_HELP_STRING([--with-apple-xnu-source],
  38     [Specify path to Apple XNU source])], [
  39   apple_xnu_source_libkern_path=${withval}/libkern
  40   apple_xnu_source_bsd_path=${withval}/bsd
  41   apple_xnu_source_osfmk_path=${withval}/osfmk
  42   CPPFLAGS="$CPPFLAGS -idirafter $apple_xnu_source_libkern_path -isystem $apple_xnu_source_bsd_path"
  43 ])
  44
  45 AC_ARG_WITH([apple-objc4-source],
  46   [AS_HELP_STRING([--with-apple-objc4-source],
  47     [Specify path to Apple objc4 source])], [
  48   apple_objc4_source_runtime_path=${withval}/runtime
  49 ])
  50
  51 AC_ARG_WITH([apple-libauto-source],
  52   [AS_HELP_STRING([--with-apple-libauto-source],
  53     [Specify path to Apple libauto source])], [
  54   apple_libauto_source_path=${withval}
  55   CPPFLAGS="$CPPFLAGS -I$apple_libauto_source_path"
  56 ])
  57
  58 AC_CACHE_CHECK([for System.framework/PrivateHeaders], dispatch_cv_system_privateheaders,
  59   [AS_IF([test -d /System/Library/Frameworks/System.framework/PrivateHeaders],
  60     [dispatch_cv_system_privateheaders=yes], [dispatch_cv_system_privateheaders=no])]
  61 )
  62 AS_IF([test "x$dispatch_cv_system_privateheaders" != "xno"],
  63   [CPPFLAGS="$CPPFLAGS -I/System/Library/Frameworks/System.framework/PrivateHeaders"]
  64 )
  65
  66 #
  67 # On Mac OS X, libdispatch_init is automatically invoked during libSystem
  68 # process initialization.  On other systems, it is tagged as a library
  69 # constructor to be run by automatically by the runtime linker.
  70 #
  71 AC_ARG_ENABLE([libdispatch-init-constructor],
  72   [AS_HELP_STRING([--disable-libdispatch-init-constructor],
  73     [Disable libdispatch_init as a constructor])],,
  74   [AS_IF([test -f /usr/lib/system/libdispatch.dylib],
  75     [enable_libdispatch_init_constructor=no])]
  76 )
  77 AS_IF([test "x$enable_libdispatch_init_constructor" != "xno"],
  78   [AC_DEFINE(USE_LIBDISPATCH_INIT_CONSTRUCTOR, 1,
  79     [Define to tag libdispatch_init as a constructor])]
  80 )
  81
  82 #
  83 # On Mac OS X libdispatch can use the non-portable direct pthread TSD functions
  84 #
  85 AC_ARG_ENABLE([apple-tsd-optimizations],
  86   [AS_HELP_STRING([--enable-apple-tsd-optimizations],
  87     [Use non-portable pthread TSD optimizations for Mac OS X.])]
  88 )
  89 AS_IF([test "x$enable_apple_tsd_optimizations" = "xyes"],
  90   [AC_DEFINE(USE_APPLE_TSD_OPTIMIZATIONS, 1,
  91     [Define to use non-portable pthread TSD optimizations for Mac OS X)])]
  92 )
  93
  94 AC_USE_SYSTEM_EXTENSIONS
  95 AM_INIT_AUTOMAKE([foreign no-dependencies])
  96 LT_INIT([disable-static])
  97
  98 AC_PROG_INSTALL
  99 AC_PATH_PROGS(MIG, mig)
 100 AC_PATH_PROG(LEAKS, leaks)
 101 AS_IF([test "x$LEAKS" != "x"],
 102   [AC_DEFINE(HAVE_LEAKS, 1, [Define if Apple leaks program is present])]
 103 )
 104
 105 DISPATCH_C_ATOMIC_BUILTINS
 106
 107 case $dispatch_cv_atomic in
 108   yes) ;;
 109   -march*) MARCH_FLAGS="$dispatch_cv_atomic"
 110          AC_SUBST([MARCH_FLAGS]) ;;
 111   *) AC_MSG_ERROR([No gcc builtin atomic operations available]) ;;
 112 esac
 113
 114 #
 115 # Find libraries we will need
 116 #
 117 AC_SEARCH_LIBS(clock_gettime, rt)
 118 AC_SEARCH_LIBS(pthread_create, pthread)
 119
 120 #
 121 # Prefer native kqueue(2); otherwise use libkqueue if present.
 122 #
 123 AC_CHECK_HEADER(sys/event.h, [],
 124   [PKG_CHECK_MODULES(KQUEUE, libkqueue)]
 125 )
 126
 127 #
 128 # Checks for header files.
 129 #
 130 AC_HEADER_STDC
 131 AC_CHECK_HEADERS([TargetConditionals.h pthread_np.h malloc/malloc.h libkern/OSCrossEndian.h libkern/OSAtomic.h])
 132
 133 # hack for pthread_machdep.h's #include <System/machine/cpu_capabilities.h>
 134 AS_IF([test -n "$apple_xnu_source_osfmk_path"], [
 135   saveCPPFLAGS="$CPPFLAGS"
 136   CPPFLAGS="$CPPFLAGS -I."
 137   ln -fsh "$apple_xnu_source_osfmk_path" System
 138 ])
 139 AC_CHECK_HEADERS([pthread_machdep.h])
 140 AS_IF([test -n "$apple_xnu_source_osfmk_path"], [
 141   rm -f System
 142   CPPFLAGS="$saveCPPFLAGS"
 143   AC_CONFIG_COMMANDS([src/System],
 144     [ln -fsh "$apple_xnu_source_osfmk_path" src/System],
 145     [apple_xnu_source_osfmk_path="$apple_xnu_source_osfmk_path"])
 146 ])
 147 # hack for xnu/bsd/sys/event.h EVFILT_SOCK declaration
 148 AS_IF([test -n "$apple_xnu_source_bsd_path"], [
 149   CPPFLAGS="$CPPFLAGS -DPRIVATE=1"
 150 ])
 151
 152 #
 153 # Check for CoreFoundation, Foundation and objc
 154 #
 155 AC_CHECK_HEADER([CoreFoundation/CoreFoundation.h],
 156   [have_corefoundation=true], [have_corefoundation=false]
 157 )
 158 AM_CONDITIONAL(HAVE_COREFOUNDATION, $have_corefoundation)
 159
 160 AC_LANG_PUSH([Objective C])
 161 AC_CHECK_HEADER([Foundation/Foundation.h],
 162   [have_foundation=true], [have_foundation=false]
 163 )
 164 AM_CONDITIONAL(HAVE_FOUNDATION, $have_foundation)
 165 # hack for objc4/runtime/objc-internal.h
 166 AS_IF([test -n "$apple_objc4_source_runtime_path"], [
 167   saveCPPFLAGS="$CPPFLAGS"
 168   CPPFLAGS="$CPPFLAGS -I."
 169   ln -fsh "$apple_objc4_source_runtime_path" objc
 170 ])
 171 AC_CHECK_HEADER([objc/objc-internal.h], [
 172   AC_DEFINE(USE_OBJC, 1, [Define to use Objective-C runtime])
 173   have_objc=true], [have_objc=false],
 174   [#include <objc/runtime.h>]
 175 )
 176 AS_IF([test -n "$apple_objc4_source_runtime_path"], [
 177   rm -f objc
 178   CPPFLAGS="$saveCPPFLAGS"
 179   AC_CONFIG_COMMANDS([src/objc],
 180     [ln -fsh "$apple_objc4_source_runtime_path" src/objc],
 181     [apple_objc4_source_runtime_path="$apple_objc4_source_runtime_path"])
 182 ])
 183 AM_CONDITIONAL(USE_OBJC, $have_objc)
 184 AC_LANG_POP([Objective C])
 185
 186 #
 187 # We use the availability of mach.h to decide whether to compile in all sorts
 188 # of Machisms, including using Mach ports as event sources, etc.
 189 #
 190 AC_CHECK_HEADER([mach/mach.h], [
 191   AC_DEFINE(HAVE_MACH, 1, [Define if mach is present])
 192   AC_DEFINE(__DARWIN_NON_CANCELABLE, 1, [Define if using Darwin $NOCANCEL])
 193   have_mach=true], [have_mach=false]
 194 )
 195 AM_CONDITIONAL(USE_MIG, $have_mach)
 196
 197 #
 198 # We use the availability of pthread_workqueue.h to decide whether to compile
 199 # in support for pthread work queues.
 200 #
 201 AC_CHECK_HEADER([pthread_workqueue.h],
 202   [AC_DEFINE(HAVE_PTHREAD_WORKQUEUES, 1, [Define if pthread work queues are present])]
 203 )
 204 AC_CHECK_FUNCS([pthread_workqueue_setdispatch_np])
 205
 206 #
 207 # Find functions and declarations we care about.
 208 #
 209 AC_CHECK_DECLS([CLOCK_UPTIME, CLOCK_MONOTONIC], [], [],
 210   [[#include <time.h>]])
 211 AC_CHECK_DECLS([NOTE_NONE, NOTE_REAP, NOTE_SIGNAL], [], [],
 212   [[#include <sys/event.h>]])
 213 AC_CHECK_DECLS([FD_COPY], [], [], [[#include <sys/select.h>]])
 214 AC_CHECK_DECLS([SIGEMT], [], [], [[#include <signal.h>]])
 215 AC_CHECK_DECLS([VQ_UPDATE, VQ_VERYLOWDISK], [], [], [[#include <sys/mount.h>]])
 216 AC_CHECK_DECLS([program_invocation_short_name], [], [], [[#include <errno.h>]])
 217 AC_CHECK_FUNCS([pthread_key_init_np pthread_main_np mach_absolute_time malloc_create_zone sysconf getprogname])
 218
 219 AC_CHECK_DECLS([POSIX_SPAWN_START_SUSPENDED],
 220   [have_posix_spawn_start_suspended=true], [have_posix_spawn_start_suspended=false],
 221   [[#include <sys/spawn.h>]]
 222 )
 223 AM_CONDITIONAL(HAVE_POSIX_SPAWN_START_SUSPENDED, $have_posix_spawn_start_suspended)
 224
 225 AC_CHECK_FUNC([sem_init],
 226   [have_sem_init=true], [have_sem_init=false]
 227 )
 228
 229 #
 230 # We support both Mach semaphores and POSIX semaphores; if the former are
 231 # available, prefer them.
 232 #
 233 AC_MSG_CHECKING([what semaphore type to use]);
 234 AS_IF([test "x$have_mach" = "xtrue"],
 235   [AC_DEFINE(USE_MACH_SEM, 1, [Define to use Mach semaphores])
 236     AC_MSG_RESULT([Mach semaphores])],
 237   [test "x$have_sem_init" = "xtrue"],
 238   [AC_DEFINE(USE_POSIX_SEM, 1, [Define to use POSIX semaphores])
 239     AC_MSG_RESULT([POSIX semaphores])],
 240   [AC_MSG_ERROR([no supported semaphore type])]
 241 )
 242
 243 AC_CHECK_HEADERS([sys/cdefs.h], [], [],
 244   [#ifdef HAVE_SYS_CDEFS_H
 245    #include <sys/cdefs.h>
 246    #endif])
 247
 248 DISPATCH_C_BLOCKS
 249
 250 AC_CACHE_CHECK([for -fvisibility=hidden], [dispatch_cv_cc_visibility_hidden], [
 251   saveCFLAGS="$CFLAGS"
 252   CFLAGS="$CFLAGS -fvisibility=hidden"
 253   AC_LINK_IFELSE([AC_LANG_PROGRAM([
 254     extern __attribute__ ((visibility ("default"))) int foo; int foo;], [foo = 0;])],
 255     [dispatch_cv_cc_visibility_hidden="yes"], [dispatch_cv_cc_visibility_hidden="no"])
 256   CFLAGS="$saveCFLAGS"
 257 ])
 258 AS_IF([test "x$dispatch_cv_cc_visibility_hidden" != "xno"], [
 259     VISIBILITY_FLAGS="-fvisibility=hidden"
 260 ])
 261 AC_SUBST([VISIBILITY_FLAGS])
 262
 263 AC_CACHE_CHECK([for -momit-leaf-frame-pointer], [dispatch_cv_cc_omit_leaf_fp], [
 264   saveCFLAGS="$CFLAGS"
 265   CFLAGS="$CFLAGS -momit-leaf-frame-pointer"
 266   AC_LINK_IFELSE([AC_LANG_PROGRAM([
 267     extern int foo(void); int foo(void) {return 1;}], [foo();])],
 268     [dispatch_cv_cc_omit_leaf_fp="yes"], [dispatch_cv_cc_omit_leaf_fp="no"])
 269   CFLAGS="$saveCFLAGS"
 270 ])
 271 AS_IF([test "x$dispatch_cv_cc_omit_leaf_fp" != "xno"], [
 272   OMIT_LEAF_FP_FLAGS="-momit-leaf-frame-pointer"
 273 ])
 274 AC_SUBST([OMIT_LEAF_FP_FLAGS])
 275
 276 AC_CACHE_CHECK([for darwin linker], [dispatch_cv_ld_darwin], [
 277   saveLDFLAGS="$LDFLAGS"
 278   LDFLAGS="$LDFLAGS -dynamiclib -compatibility_version 1.2.3 -current_version 4.5.6 -dead_strip"
 279   AC_LINK_IFELSE([AC_LANG_PROGRAM([
 280     extern int foo; int foo;], [foo = 0;])],
 281     [dispatch_cv_ld_darwin="yes"], [dispatch_cv_ld_darwin="no"])
 282   LDFLAGS="$saveLDFLAGS"
 283 ])
 284 AM_CONDITIONAL(HAVE_DARWIN_LD, [test "x$dispatch_cv_ld_darwin" != "xno"])
 285
 286 #
 287 # Temporary: some versions of clang do not mark __builtin_trap() as
 288 # __attribute__((__noreturn__)).  Detect and add if required.
 289 #
 290 AC_COMPILE_IFELSE(
 291   [AC_LANG_PROGRAM([void __attribute__((__noreturn__)) temp(void) { __builtin_trap(); }], [])],
 292   [AC_DEFINE(HAVE_NORETURN_BUILTIN_TRAP, 1, [Define if __builtin_trap marked noreturn])]
 293 )
 294
 295 #
 296 # Generate Makefiles.
 297 #
 298 AC_CONFIG_FILES([Makefile dispatch/Makefile man/Makefile os/Makefile private/Makefile src/Makefile])
 299 AC_OUTPUT