Fix test-sysvsem on some platforms

The command IPC_STAT of semctl expects an union semun in its fourth
argument instead of struct semid_ds *.  This can cause failures on
powerpc32-linux-gnu.

Checked on x86_64-linux-gnu, i686-linux-gnu, and powerpc32-linux-gnu
(qemu system emulation).

diff --git a/ChangeLog b/ChangeLog
index b3b6df53ad0872cde5539bd1c6a7c29fce255728..7762fb7f79450fe0969359fbb20caebd232c677e 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-01-02  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+
+       * sysvipc/test-sysvsem.c (do_test): Define and use union semun on
+       semctl.
+
 2017-01-02  Joseph Myers  <joseph@codesourcery.com>
 
        * math/test-nearbyint-except.c: Include <stdbool.h>.

diff --git a/sysvipc/test-sysvsem.c b/sysvipc/test-sysvsem.c
index 92396a60e6ca208ed3654fb92846ac50cb224a71..279eca9b096623e8c58ede095462442bf90e3483 100644 (file)
--- a/sysvipc/test-sysvsem.c
+++ b/sysvipc/test-sysvsem.c
@@ -55,6 +55,13 @@ do_prepare (int argc, char *argv[])
 
 #define SEM_MODE 0644
 
+union semun
+{
+  int val;
+  struct semid_ds *buf;
+  unsigned short  *array;
+};
+
 static int
 do_test (void)
 {
@@ -74,7 +81,7 @@ do_test (void)
 
   /* Get semaphore kernel information and do some sanity checks.  */
   struct semid_ds seminfo;
-  if (semctl (semid, 0, IPC_STAT, &seminfo) == -1)
+  if (semctl (semid, 0, IPC_STAT, (union semun) { .buf = &seminfo }) == -1)
     FAIL_EXIT1 ("semctl with IPC_STAT failed (errno=%d)", errno);
 
   if (seminfo.sem_perm.__key != key)