[613ab62] | 1 | dnl |
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| 2 | dnl $Id$ |
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| 3 | dnl |
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| 4 | dnl Check for System V IPC calls used by Unix simulators |
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| 5 | dnl |
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| 6 | dnl 98/07/17 Dario Alcocer alcocer@netcom.com |
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| 7 | dnl Ralf Corsepius corsepiu@faw.uni-ulm.de |
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| 8 | dnl |
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| 9 | dnl Note: $host_os should probably *not* ever be used here to |
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| 10 | dnl determine if host supports System V IPC calls, since some |
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| 11 | dnl (e.g. FreeBSD 2.x) are configured by default to include only |
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| 12 | dnl a subset of the System V IPC calls. Therefore, to make sure |
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| 13 | dnl all of the required calls are found, test for each call explicitly. |
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| 14 | dnl |
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| 15 | dnl All of the calls use IPC_PRIVATE, so tests will not unintentionally |
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| 16 | dnl modify any existing key sets. See the man pages for semget, shmget, |
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| 17 | dnl msgget, semctl, shmctl and msgctl for details. |
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| 18 | |
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| 19 | AC_DEFUN(RTEMS_SYSV_SEM, |
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| 20 | [AC_REQUIRE([RTEMS_PROG_CC]) |
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| 21 | AC_REQUIRE([AC_CANONICAL_HOST]) |
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| 22 | AC_CACHE_CHECK(whether $RTEMS_HOST supports System V semaphores, |
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| 23 | rtems_cv_sysv_sem, |
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| 24 | [ |
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| 25 | AC_TRY_RUN([ |
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| 26 | #include <sys/types.h> |
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| 27 | #include <sys/ipc.h> |
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| 28 | #include <sys/sem.h> |
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| 29 | int main () { |
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[06fa582] | 30 | #if !defined(sun) |
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[613ab62] | 31 | union semun arg ; |
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[06fa582] | 32 | #else |
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| 33 | union semun { |
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| 34 | int val; |
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| 35 | struct semid_ds *buf; |
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| 36 | ushort *array; |
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| 37 | } arg; |
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| 38 | #endif |
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[613ab62] | 39 | int id=semget(IPC_PRIVATE,1,IPC_CREAT|0400); |
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| 40 | if (id == -1) |
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| 41 | exit(1); |
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| 42 | arg.val = 0; /* avoid implicit type cast to union */ |
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| 43 | if (semctl(id, 0, IPC_RMID, arg) == -1) |
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| 44 | exit(1); |
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| 45 | exit(0); |
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| 46 | } |
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| 47 | ], |
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| 48 | rtems_cv_sysv_sem="yes", rtems_cv_sysv_sem="no", :) |
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| 49 | ]) |
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| 50 | ]) |
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| 51 | |
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| 52 | AC_DEFUN(RTEMS_SYSV_SHM, |
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| 53 | [AC_REQUIRE([RTEMS_PROG_CC]) |
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| 54 | AC_REQUIRE([AC_CANONICAL_HOST]) |
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| 55 | AC_CACHE_CHECK(whether $RTEMS_HOST supports System V shared memory, |
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| 56 | rtems_cv_sysv_shm, |
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| 57 | [ |
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| 58 | AC_TRY_RUN([ |
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| 59 | #include <sys/types.h> |
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| 60 | #include <sys/ipc.h> |
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| 61 | #include <sys/shm.h> |
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| 62 | int main () { |
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| 63 | int id=shmget(IPC_PRIVATE,1,IPC_CREAT|0400); |
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| 64 | if (id == -1) |
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| 65 | exit(1); |
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| 66 | if (shmctl(id, IPC_RMID, 0) == -1) |
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| 67 | exit(1); |
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| 68 | exit(0); |
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| 69 | } |
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| 70 | ], |
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| 71 | rtems_cv_sysv_shm="yes", rtems_cv_sysv_shm="no", :) |
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| 72 | ]) |
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| 73 | ]) |
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| 74 | |
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| 75 | AC_DEFUN(RTEMS_SYSV_MSG, |
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| 76 | [AC_REQUIRE([RTEMS_PROG_CC]) |
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| 77 | AC_REQUIRE([AC_CANONICAL_HOST]) |
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| 78 | AC_CACHE_CHECK(whether $RTEMS_HOST supports System V messages, |
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| 79 | rtems_cv_sysv_msg, |
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| 80 | [ |
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| 81 | AC_TRY_RUN([ |
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| 82 | #include <sys/types.h> |
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| 83 | #include <sys/ipc.h> |
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| 84 | #include <sys/msg.h> |
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| 85 | int main () { |
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| 86 | int id=msgget(IPC_PRIVATE,IPC_CREAT|0400); |
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| 87 | if (id == -1) |
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| 88 | exit(1); |
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| 89 | if (msgctl(id, IPC_RMID, 0) == -1) |
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| 90 | exit(1); |
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| 91 | exit(0); |
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| 92 | } |
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| 93 | ], |
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| 94 | rtems_cv_sysv_msg="yes", rtems_cv_sysv_msg="no", :) |
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| 95 | ]) |
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| 96 | ]) |
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