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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [aclocal/] [sysv-ipc.m4] - Blame information for rev 382

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Line No. Rev Author Line
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dnl
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dnl $Id: sysv-ipc.m4,v 1.2 2001-09-27 11:59:11 chris Exp $
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dnl
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dnl Check for System V IPC calls used by Unix simulators
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dnl
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dnl 98/07/17 Dario Alcocer     alcocer@netcom.com
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dnl          Ralf Corsepius    corsepiu@faw.uni-ulm.de
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dnl
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dnl Note: $host_os should probably *not* ever be used here to
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dnl determine if host supports System V IPC calls, since some
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dnl (e.g. FreeBSD 2.x) are configured by default to include only
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dnl a subset of the System V IPC calls.  Therefore, to make sure
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dnl all of the required calls are found, test for each call explicitly.
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dnl
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dnl All of the calls use IPC_PRIVATE, so tests will not unintentionally
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dnl modify any existing key sets.  See the man pages for semget, shmget,
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dnl msgget, semctl, shmctl and msgctl for details.
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AC_DEFUN(RTEMS_UNION_SEMUN,
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[
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AC_CACHE_CHECK([whether $RTEMS_HOST defines union semun],
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  rtems_cv_HAS_UNION_SEMUN,
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  [AC_TRY_COMPILE([
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>],
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[union semun arg ;],
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[rtems_cv_HAS_UNION_SEMUN="yes"],
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[rtems_cv_HAS_UNION_SEMUN="no"])
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if test "$rtems_cv_HAS_UNION_SEMUN" = "yes"; then
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    AC_DEFINE(HAS_UNION_SEMUN)
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fi])
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])
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AC_DEFUN(RTEMS_SYSV_SEM,
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[AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([RTEMS_CANONICAL_HOST])
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AC_CACHE_CHECK(whether $RTEMS_HOST supports System V semaphores,
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rtems_cv_sysv_sem,
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[
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AC_TRY_RUN(
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[
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>
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#if !HAS_UNION_SEMUN
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  union semun {
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    int val;
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    struct semid_ds *buf;
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    ushort *array;
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  } ;
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#endif
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int main () {
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  union semun arg ;
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  int id=semget(IPC_PRIVATE,1,IPC_CREAT|0400);
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  if (id == -1)
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    exit(1);
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  arg.val = 0; /* avoid implicit type cast to union */
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  if (semctl(id, 0, IPC_RMID, arg) == -1)
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    exit(1);
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  exit(0);
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}
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],
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rtems_cv_sysv_sem="yes", rtems_cv_sysv_sem="no", :)
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])
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])
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AC_DEFUN(RTEMS_SYSV_SHM,
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[AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([RTEMS_CANONICAL_HOST])
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AC_CACHE_CHECK(whether $RTEMS_HOST supports System V shared memory,
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rtems_cv_sysv_shm,
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[
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AC_TRY_RUN([
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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int main () {
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  int id=shmget(IPC_PRIVATE,1,IPC_CREAT|0400);
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  if (id == -1)
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    exit(1);
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  if (shmctl(id, IPC_RMID, 0) == -1)
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    exit(1);
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  exit(0);
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}
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],
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rtems_cv_sysv_shm="yes", rtems_cv_sysv_shm="no", :)
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])
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])
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AC_DEFUN(RTEMS_SYSV_MSG,
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[AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([RTEMS_CANONICAL_HOST])
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AC_CACHE_CHECK(whether $RTEMS_HOST supports System V messages,
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rtems_cv_sysv_msg,
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[
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AC_TRY_RUN([
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/msg.h>
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int main () {
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  int id=msgget(IPC_PRIVATE,IPC_CREAT|0400);
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  if (id == -1)
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    exit(1);
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  if (msgctl(id, IPC_RMID, 0) == -1)
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    exit(1);
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  exit(0);
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}
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],
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rtems_cv_sysv_msg="yes", rtems_cv_sysv_msg="no", :)
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])
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])
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AC_DEFUN(RTEMS_CHECK_SYSV_UNIX,
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[AC_REQUIRE([RTEMS_CANONICAL_HOST])
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if test "$RTEMS_CPU" = "unix" ; then
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  RTEMS_UNION_SEMUN
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  RTEMS_SYSV_SEM
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  if test "$rtems_cv_sysv_sem" != "yes" ; then
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    AC_MSG_ERROR([System V semaphores don't work, required by simulator])
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  fi
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  RTEMS_SYSV_SHM
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  if test "$rtems_cv_sysv_shm" != "yes" ; then
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    AC_MSG_ERROR([System V shared memory doesn't work, required by simulator])
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  fi
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  RTEMS_SYSV_MSG
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  if test "$rtems_cv_sysv_msg" != "yes" ; then
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    AC_MSG_ERROR([System V messages don't work, required by simulator])
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  fi
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fi
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])

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