Remove the configure and cmake checks for sys/wait.h

If we don't have sys/wait.h and we're on a unix system there's no way
that several of the llvm tools work at all. This includes clang.

Just remove the configure and cmake checks entirely - we'll get a
build error instead of building something broken now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243957 91177308-0d34-0410-b5e6-96231b3b80d8

autoconf/configure.ac

@@ -1786,7 +1786,6 @@ dnl Generally we're looking for POSIX headers.
 AC_HEADER_DIRENT
 AC_HEADER_MMAP_ANONYMOUS
 AC_HEADER_STAT
-AC_HEADER_SYS_WAIT
 AC_HEADER_TIME
 
 AC_LANG_PUSH([C++])

cmake/config-ix.cmake

@@ -67,7 +67,6 @@ check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
 check_include_file(sys/stat.h HAVE_SYS_STAT_H)
 check_include_file(sys/time.h HAVE_SYS_TIME_H)
 check_include_file(sys/uio.h HAVE_SYS_UIO_H)
-check_include_file(sys/wait.h HAVE_SYS_WAIT_H)
 check_include_file(termios.h HAVE_TERMIOS_H)
 check_include_file(unistd.h HAVE_UNISTD_H)
 check_include_file(utime.h HAVE_UTIME_H)

configure

@@ -11124,90 +11124,6 @@ _ACEOF
 
 fi
 
-{ echo "$as_me:$LINENO: checking for sys/wait.h that is POSIX.1 compatible" >&5
-echo $ECHO_N "checking for sys/wait.h that is POSIX.1 compatible... $ECHO_C" >&6; }
-if test "${ac_cv_header_sys_wait_h+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <sys/types.h>
-#include <sys/wait.h>
-#ifndef WEXITSTATUS
-# define WEXITSTATUS(stat_val) ((unsigned int) (stat_val) >> 8)
-#endif
-#ifndef WIFEXITED
-# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
-#endif
-
-int
-main ()
-{
-  int s;
-  wait (&s);
-  s = WIFEXITED (s) ? WEXITSTATUS (s) : 1;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext
-if { (ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_compile") 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-	 { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
-  { (case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; } &&
-	 { ac_try='test -s conftest.$ac_objext'
-  { (case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
-  (eval "$ac_try") 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_header_sys_wait_h=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_cv_header_sys_wait_h=no
-fi
-
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ echo "$as_me:$LINENO: result: $ac_cv_header_sys_wait_h" >&5
-echo "${ECHO_T}$ac_cv_header_sys_wait_h" >&6; }
-if test $ac_cv_header_sys_wait_h = yes; then
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_SYS_WAIT_H 1
-_ACEOF
-
-fi
-
 { echo "$as_me:$LINENO: checking whether time.h and sys/time.h may both be included" >&5
 echo $ECHO_N "checking whether time.h and sys/time.h may both be included... $ECHO_C" >&6; }
 if test "${ac_cv_header_time+set}" = set; then
@@ -19793,4 +19709,3 @@ echo "$as_me: error: $ac_sub_configure failed for $ac_dir" >&2;}
     cd "$ac_popdir"
   done
 fi
-

include/llvm/Config/config.h.cmake

@@ -324,9 +324,6 @@
 /* Define to 1 if you have the <sys/uio.h> header file. */
 #cmakedefine HAVE_SYS_UIO_H ${HAVE_SYS_UIO_H}
 
-/* Define to 1 if you have <sys/wait.h> that is POSIX.1 compatible. */
-#cmakedefine HAVE_SYS_WAIT_H ${HAVE_SYS_WAIT_H}
-
 /* Define if the setupterm() function is supported this platform. */
 #cmakedefine HAVE_TERMINFO ${HAVE_TERMINFO}
 

include/llvm/Config/config.h.in

@@ -318,9 +318,6 @@
 /* Define to 1 if you have the <sys/uio.h> header file. */
 #undef HAVE_SYS_UIO_H
 
-/* Define to 1 if you have <sys/wait.h> that is POSIX.1 compatible. */
-#undef HAVE_SYS_WAIT_H
-
 /* Define if the setupterm() function is supported this platform. */
 #undef HAVE_TERMINFO
 

lib/Support/Unix/Program.inc

@@ -323,7 +323,6 @@ namespace llvm {
 
 ProcessInfo sys::Wait(const ProcessInfo &PI, unsigned SecondsToWait,
                       bool WaitUntilTerminates, std::string *ErrMsg) {
-#ifdef HAVE_SYS_WAIT_H
   struct sigaction Act, Old;
   assert(PI.Pid && "invalid pid to wait on, process not started?");
 
@@ -417,12 +416,6 @@ ProcessInfo sys::Wait(const ProcessInfo &PI, unsigned SecondsToWait,
     // signal during execution as opposed to failing to execute.
     WaitResult.ReturnCode = -2;
   }
-#else
-  if (ErrMsg)
-    *ErrMsg = "Program::Wait is not implemented on this platform yet!";
-  ProcessInfo WaitResult;
-  WaitResult.ReturnCode = -2;
-#endif
   return WaitResult;
 }
 

lib/Support/Unix/Unix.h

@@ -29,6 +29,7 @@
 #include <cstring>
 #include <string>
 #include <sys/types.h>
+#include <sys/wait.h>
 
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
@@ -43,22 +44,10 @@
 #endif
 #include <time.h>
 
-#ifdef HAVE_SYS_WAIT_H
-# include <sys/wait.h>
-#endif
-
 #ifdef HAVE_DLFCN_H
 # include <dlfcn.h>
 #endif
 
-#ifndef WEXITSTATUS
-# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
-#endif
-
-#ifndef WIFEXITED
-# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
-#endif
-
 /// This function builds an error message into \p ErrMsg using the \p prefix
 /// string and the Unix error number given by \p errnum. If errnum is -1, the
 /// default then the value of errno is used.