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AC_SUBST(THREADING_H, "threading.h")
AC_CHECK_FUNC(objc_sync_enter,, [
AC_SUBST(OBJC_SYNC_M, "objc_sync.m")
AC_DEFINE(NEED_OBJC_SYNC_INIT, 1,
[Whether objc_sync_init needs to be called])])
AC_TRY_LINK([#include <stdint.h>], [
int32_t i, j;
if (__sync_add_and_fetch(&i, 1))
j = __sync_sub_and_fetch(&i, 1);
while (!__sync_bool_compare_and_swap(&i, 0, 1));
], [
have_gcc_atomic_ops="yes"
AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
[Whether gcc atomic operations are available])
], [
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -march=i486"
AC_TRY_LINK([#include <stdint.h>], [
int32_t i, j;
if (__sync_add_and_fetch(&i, 1))
j = __sync_sub_and_fetch(&i, 1);
while (!__sync_bool_compare_and_swap(&i, 0, 1));
], [
have_gcc_atomic_ops="yes"
AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
[Whether gcc atomic operations are available])
], [
have_gcc_atomic_ops="no"
OBJCFLAGS="$old_OBJCFLAGS"])])
if test x"$have_gcc_atomic_ops" != x"yes"; then
AC_CHECK_HEADER(libkern/OSAtomic.h, [
have_libkern_osatomic_h="yes"
AC_DEFINE(OF_HAVE_LIBKERN_OSATOMIC_H, 1,
[Whether we have libkern/OSAtomic.h])])
fi
AC_MSG_CHECKING(for atomic operations)
if test x"$have_gcc_atomic_ops" = x"yes"; then
AC_DEFINE(OF_ATOMIC_OPS, 1, [Whether we have atomic operations])
AC_MSG_RESULT(gcc builtins)
elif test x"$have_libkern_osatomic_h" = x"yes"; then
AC_DEFINE(OF_ATOMIC_OPS, 1, [Whether we have atomic operations])
AC_MSG_RESULT(libkern/OSAtomic.h)
else
AC_MSG_RESULT(none)
fi
else
dnl We can only have one thread - therefore everything is atomic
AC_DEFINE(OF_ATOMIC_OPS, 1, [Whether we have atomic operations])
fi
AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
AC_CHECK_LIB(ws2_32, main, LIBS="$LIBS -lws2_32")
AC_MSG_CHECKING(for getaddrinfo)
AC_TRY_COMPILE([
#include <stddef.h>
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AC_SUBST(THREADING_H, "threading.h")
AC_CHECK_FUNC(objc_sync_enter,, [
AC_SUBST(OBJC_SYNC_M, "objc_sync.m")
AC_DEFINE(NEED_OBJC_SYNC_INIT, 1,
[Whether objc_sync_init needs to be called])])
atomic_ops="none"
AC_MSG_CHECKING(whether __sync_* works)
AC_TRY_LINK([#include <stdint.h>], [
int32_t i, j;
if (__sync_add_and_fetch(&i, 1))
j = __sync_sub_and_fetch(&i, 1);
while (!__sync_bool_compare_and_swap(&i, 0, 1));
], [
AC_MSG_RESULT(yes)
atomic_ops="gcc builtins"
AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
[Whether gcc atomic operations are available])
], [
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -march=i486"
AC_TRY_LINK([#include <stdint.h>], [
int32_t i, j;
if (__sync_add_and_fetch(&i, 1))
j = __sync_sub_and_fetch(&i, 1);
while (!__sync_bool_compare_and_swap(&i, 0, 1));
], [
AC_MSG_RESULT(yes, with -march=i486)
atomic_ops="gcc builtins (with -march=i486)"
AC_DEFINE(OF_HAVE_GCC_ATOMIC_OPS, 1,
[Whether gcc atomic operations are available])
], [
AC_MSG_RESULT(no)
OBJCFLAGS="$old_OBJCFLAGS"])])
if test x"$atomic_ops" = x"none"; then
AC_CHECK_HEADER(libkern/OSAtomic.h, [
atomic_ops="libkern/OSAtomic.h"
AC_DEFINE(OF_HAVE_LIBKERN_OSATOMIC_H, 1,
[Whether we have libkern/OSAtomic.h])])
fi
else
dnl We can only have one thread - therefore everything is atomic
atomic_ops="not needed"
fi
AC_MSG_CHECKING(for atomic operations)
if test x"$atomic_ops" != x"none"; then
AC_DEFINE(OF_ATOMIC_OPS, 1, [Whether we have atomic operations])
fi
AC_MSG_RESULT($atomic_ops)
AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
AC_CHECK_LIB(ws2_32, main, LIBS="$LIBS -lws2_32")
AC_MSG_CHECKING(for getaddrinfo)
AC_TRY_COMPILE([
#include <stddef.h>
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