Remove union wait [BZ #19613]

The overloading approach in the W* macros was incompatible with
integer expressions of a type different from int.  Applications
using union wait and these macros will have to migrate to the
POSIX-specified int status type.

1 files changed, 7 insertions, 46 deletions

diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index cc77708..d0c78fa 100644
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -41,54 +41,15 @@ __BEGIN_DECLS
 # include <bits/waitflags.h>
 # include <bits/waitstatus.h>
 
-# ifdef __USE_MISC
-
-/* Lots of hair to allow traditional BSD use of `union wait'
-   as well as POSIX.1 use of `int' for the status word.  */
-
-#  if defined __GNUC__ && !defined __cplusplus
-#   define __WAIT_INT(status) \
-  (__extension__ (((union { __typeof(status) __in; int __i; }) \
-		   { .__in = (status) }).__i))
-#  else
-#   define __WAIT_INT(status)	(*(int *) &(status))
-#  endif
-
-/* This is the type of the argument to `wait'.  The funky union
-   causes redeclarations with either `int *' or `union wait *' to be
-   allowed without complaint.  __WAIT_STATUS_DEFN is the type used in
-   the actual function definitions.  */
-
-#  if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
-#   define __WAIT_STATUS	void *
-#   define __WAIT_STATUS_DEFN	void *
-#  else
-/* This works in GCC 2.6.1 and later.  */
-typedef union
-  {
-    union wait *__uptr;
-    int *__iptr;
-  } __WAIT_STATUS __attribute__ ((__transparent_union__));
-#   define __WAIT_STATUS_DEFN	int *
-#  endif
-
-# else /* Don't use misc.  */
-
-#  define __WAIT_INT(status)	(status)
-#  define __WAIT_STATUS		int *
-#  define __WAIT_STATUS_DEFN	int *
-
-# endif /* Use misc.  */
-
 /* Define the macros <sys/wait.h> also would define this way.  */
-# define WEXITSTATUS(status)	__WEXITSTATUS (__WAIT_INT (status))
-# define WTERMSIG(status)	__WTERMSIG (__WAIT_INT (status))
-# define WSTOPSIG(status)	__WSTOPSIG (__WAIT_INT (status))
-# define WIFEXITED(status)	__WIFEXITED (__WAIT_INT (status))
-# define WIFSIGNALED(status)	__WIFSIGNALED (__WAIT_INT (status))
-# define WIFSTOPPED(status)	__WIFSTOPPED (__WAIT_INT (status))
+# define WEXITSTATUS(status)	__WEXITSTATUS (status)
+# define WTERMSIG(status)	__WTERMSIG (status)
+# define WSTOPSIG(status)	__WSTOPSIG (status)
+# define WIFEXITED(status)	__WIFEXITED (status)
+# define WIFSIGNALED(status)	__WIFSIGNALED (status)
+# define WIFSTOPPED(status)	__WIFSTOPPED (status)
 # ifdef __WIFCONTINUED
-#  define WIFCONTINUED(status)	__WIFCONTINUED (__WAIT_INT (status))
+#  define WIFCONTINUED(status)	__WIFCONTINUED (status)
 # endif
 #endif	/* X/Open or XPG7 and <sys/wait.h> not included.  */