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-rw-r--r--macros/sysv-ipc.m4133
1 files changed, 133 insertions, 0 deletions
diff --git a/macros/sysv-ipc.m4 b/macros/sysv-ipc.m4
new file mode 100644
index 0000000000..883921e2c8
--- /dev/null
+++ b/macros/sysv-ipc.m4
@@ -0,0 +1,133 @@
+dnl
+dnl $Id$
+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
+])