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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-07-23 19:39:25 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-07-23 19:39:25 +0000 |
| commit | 613ab621df0db6d7110c7a9e657b19a0eac45667 (patch) | |
| tree | 9d55a689bf0eba27adf4dcaff119ad778a5f1df5 /aclocal.m4 | |
| parent | Removed consolex from build list. This file should be obsoleted by the (diff) | |
| download | rtems-613ab621df0db6d7110c7a9e657b19a0eac45667.tar.bz2 | |
Patch from Dario Alcocer <alcocer@connectnet.com> and Ralf Corsepius
<corsepiu@faw.uni-ulm.de> which attempts to detect when the UNIX port
is being configured on a system without System V IPC support. This
is an optional component on both FreeBSD and Linux systems. Most
Linux 2.x kernels ship with it enabled but it is still a real risk.
This test may have undesirable side-effects on some hosts. We will
address those conflicts as they arise.
Diffstat (limited to 'aclocal.m4')
| -rw-r--r-- | aclocal.m4 | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/aclocal.m4 b/aclocal.m4 index 8df0d272fa..feb6baec58 100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -432,6 +432,95 @@ AC_MSG_RESULT(${rtems_cv_exeext}) AC_SUBST(EXEEXT)]) +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_SYSV_SEM, +[AC_REQUIRE([RTEMS_PROG_CC]) +AC_REQUIRE([AC_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> +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([RTEMS_PROG_CC]) +AC_REQUIRE([AC_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([RTEMS_PROG_CC]) +AC_REQUIRE([AC_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", :) +]) +]) + dnl $Id$ dnl RTEMS_CHECK_MAKEFILE(path) |