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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [aclocal/] [sysv-ipc.m4] - Rev 232
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dnl dnl $Id: sysv-ipc.m4,v 1.2 2001-09-27 11:59:11 chris Exp $ dnl dnl Check for System V IPC calls used by Unix simulators dnl dnl 98/07/17 Dario Alcocer alcocer@netcom.com dnl Ralf Corsepius corsepiu@faw.uni-ulm.de dnl dnl Note: $host_os should probably *not* ever be used here to dnl determine if host supports System V IPC calls, since some dnl (e.g. FreeBSD 2.x) are configured by default to include only dnl a subset of the System V IPC calls. Therefore, to make sure dnl all of the required calls are found, test for each call explicitly. dnl dnl All of the calls use IPC_PRIVATE, so tests will not unintentionally dnl modify any existing key sets. See the man pages for semget, shmget, dnl msgget, semctl, shmctl and msgctl for details. AC_DEFUN(RTEMS_UNION_SEMUN, [ AC_CACHE_CHECK([whether $RTEMS_HOST defines union semun], rtems_cv_HAS_UNION_SEMUN, [AC_TRY_COMPILE([ #include <sys/types.h> #include <sys/ipc.h> #include <sys/sem.h>], [union semun arg ;], [rtems_cv_HAS_UNION_SEMUN="yes"], [rtems_cv_HAS_UNION_SEMUN="no"]) if test "$rtems_cv_HAS_UNION_SEMUN" = "yes"; then AC_DEFINE(HAS_UNION_SEMUN) fi]) ]) AC_DEFUN(RTEMS_SYSV_SEM, [AC_REQUIRE([AC_PROG_CC]) AC_REQUIRE([RTEMS_CANONICAL_HOST]) AC_CACHE_CHECK(whether $RTEMS_HOST supports System V semaphores, rtems_cv_sysv_sem, [ AC_TRY_RUN( [ #include <sys/types.h> #include <sys/ipc.h> #include <sys/sem.h> #if !HAS_UNION_SEMUN union semun { int val; struct semid_ds *buf; ushort *array; } ; #endif int main () { union semun arg ; int id=semget(IPC_PRIVATE,1,IPC_CREAT|0400); if (id == -1) exit(1); arg.val = 0; /* avoid implicit type cast to union */ if (semctl(id, 0, IPC_RMID, arg) == -1) exit(1); exit(0); } ], rtems_cv_sysv_sem="yes", rtems_cv_sysv_sem="no", :) ]) ]) AC_DEFUN(RTEMS_SYSV_SHM, [AC_REQUIRE([AC_PROG_CC]) AC_REQUIRE([RTEMS_CANONICAL_HOST]) AC_CACHE_CHECK(whether $RTEMS_HOST supports System V shared memory, rtems_cv_sysv_shm, [ AC_TRY_RUN([ #include <sys/types.h> #include <sys/ipc.h> #include <sys/shm.h> int main () { int id=shmget(IPC_PRIVATE,1,IPC_CREAT|0400); if (id == -1) exit(1); if (shmctl(id, IPC_RMID, 0) == -1) exit(1); exit(0); } ], rtems_cv_sysv_shm="yes", rtems_cv_sysv_shm="no", :) ]) ]) AC_DEFUN(RTEMS_SYSV_MSG, [AC_REQUIRE([AC_PROG_CC]) AC_REQUIRE([RTEMS_CANONICAL_HOST]) AC_CACHE_CHECK(whether $RTEMS_HOST supports System V messages, rtems_cv_sysv_msg, [ AC_TRY_RUN([ #include <sys/types.h> #include <sys/ipc.h> #include <sys/msg.h> int main () { int id=msgget(IPC_PRIVATE,IPC_CREAT|0400); if (id == -1) exit(1); if (msgctl(id, IPC_RMID, 0) == -1) exit(1); exit(0); } ], rtems_cv_sysv_msg="yes", rtems_cv_sysv_msg="no", :) ]) ]) AC_DEFUN(RTEMS_CHECK_SYSV_UNIX, [AC_REQUIRE([RTEMS_CANONICAL_HOST]) if test "$RTEMS_CPU" = "unix" ; then RTEMS_UNION_SEMUN RTEMS_SYSV_SEM if test "$rtems_cv_sysv_sem" != "yes" ; then AC_MSG_ERROR([System V semaphores don't work, required by simulator]) fi RTEMS_SYSV_SHM if test "$rtems_cv_sysv_shm" != "yes" ; then AC_MSG_ERROR([System V shared memory doesn't work, required by simulator]) fi RTEMS_SYSV_MSG if test "$rtems_cv_sysv_msg" != "yes" ; then AC_MSG_ERROR([System V messages don't work, required by simulator]) fi fi ])
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