Remove wait() function in dejagnu.h to resolve PR59586

ChangeLog

@@ -1,5 +1,11 @@
 2022-11-28  Jacob Bachmeyer  <jcb@gnu.org>
 
+	* dejagnu.h: Remove _DEJAGNU_WAIT_ conditional and revise comment
+	to explain improved solution to the problem for which it seems to
+	have been intended as a workaround.
+	(wait): Remove this function.  It conflicted with POSIX wait(2);
+	this conflict was reported as PR59586.
+
 	* testsuite/runtest.main/stats.exp: Add test for UNSUPPORTED
 	result from a unit test program.
 	* testsuite/runtest.main/nested/testsuite/stat.test/unit-sub.awk:

dejagnu.h

@@ -25,15 +25,10 @@ Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
 #include <string.h>
 
 /* If you have problems with DejaGnu dropping failed, untested, or
- * unresolved messages generated by a unit testcase, then:  */
+ * unresolved messages generated by a unit testcase, then see the section
-
+ * "Priority of Expect Patterns" in *note (dejagnu)Writing a test case. or
-/* #define _DEJAGNU_WAIT_  */
+ * use the DejaGnu built-in unit testing support in your testsuite, which
-
+ * has been improved to resolve this issue in DejaGnu 1.6.3.  */
-#ifdef _DEJAGNU_WAIT_
-#include <sys/time.h>
-#include <sys/types.h>
-#include <unistd.h>
-#endif
 
 static int passed;
 static int failed;
@@ -45,21 +40,6 @@ static int xpassed;
 
 static char buffer[512];
 
-void
-wait (void)
-{
-#ifdef _DEJAGNU_WAIT_
-  fd_set rfds;
-  struct timeval tv;
-
-  FD_ZERO (&rfds);
-  tv.tv_sec = 0;
-  tv.tv_usec = 1;
-
-  select (0, &rfds, NULL, NULL, &tv);
-#endif
-}
-
 static inline void
 pass (const char* fmt, ...)
 {
@@ -70,7 +50,6 @@ pass (const char* fmt, ...)
   vsnprintf (buffer, sizeof (buffer), fmt, ap);
   va_end (ap);
   printf ("\tPASSED: %s\n", buffer);
-  wait ();
 }
 
 static inline void
@@ -83,7 +62,6 @@ xpass (const char* fmt, ...)
   vsnprintf (buffer, sizeof (buffer), fmt, ap);
   va_end (ap);
   printf ("\tXPASSED: %s\n", buffer);
-  wait ();
 }
 
 static inline void
@@ -96,7 +74,6 @@ fail (const char* fmt, ...)
   vsnprintf (buffer, sizeof (buffer), fmt, ap);
   va_end (ap);
   printf ("\tFAILED: %s\n", buffer);
-  wait ();
 }
 
 static inline void
@@ -109,7 +86,6 @@ xfail (const char* fmt, ...)
   vsnprintf (buffer, sizeof (buffer), fmt, ap);
   va_end (ap);
   printf ("\tXFAILED: %s\n", buffer);
-  wait ();
 }
 
 static inline void
@@ -122,7 +98,6 @@ untested (const char* fmt, ...)
   vsnprintf (buffer, sizeof (buffer), fmt, ap);
   va_end (ap);
   printf ("\tUNTESTED: %s\n", buffer);
-  wait ();
 }
 
 static inline void
@@ -135,7 +110,6 @@ unresolved (const char* fmt, ...)
   vsnprintf (buffer, sizeof (buffer), fmt, ap);
   va_end (ap);
   printf ("\tUNRESOLVED: %s\n", buffer);
-  wait ();
 }
 
 static inline void
@@ -148,7 +122,6 @@ unsupported (const char* fmt, ...)
   vsnprintf (buffer, sizeof (buffer), fmt, ap);
   va_end (ap);
   printf ("\tUNSUPPORTED: %s\n", buffer);
-  wait ();
 }
 
 static inline void
@@ -160,7 +133,6 @@ note (const char* fmt, ...)
   vsnprintf (buffer, sizeof (buffer), fmt, ap);
   va_end (ap);
   printf ("\tNOTE: %s\n", buffer);
-  wait ();
 }
 
 static inline void