-int
-waitpid (pid, stat_loc, options)
- int pid, *stat_loc, options;
+/*
+
+@deftypefn Supplemental int waitpid (int @var{pid}, int *@var{status}, int)
+
+This is a wrapper around the @code{wait} function. Any ``special''
+values of @var{pid} depend on your implementation of @code{wait}, as
+does the return value. The third argument is unused in @libib{}.
+
+@end deftypefn
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "ansidecl.h"
+
+/* On some systems (such as WindISS), you must include <sys/types.h>
+ to get the definition of "pid_t" before you include <sys/wait.h>. */
+#include <sys/types.h>
+
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#ifdef __MINGW32__
+#include <process.h>
+#define wait(s) _cwait(s,pid,_WAIT_CHILD)
+#endif
+
+pid_t
+waitpid (pid_t pid, int *stat_loc, int options ATTRIBUTE_UNUSED)
{
for (;;)
{