later cygwins have a different locaton for process.h

Signed-off-by:  Petr Mladek <pmladek@suse.cz>

dmake/config.h.in

@@ -9,6 +9,9 @@
 /* Enables the use of spawn instead of fork/exec if it is supported. */
 #undef ENABLE_SPAWN
 
+/* Define to 1 if you have the <cygwin/process.h> header file. */
+#undef HAVE_CYGWIN_PROCESS_H
+
 /* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'.
    */
 #undef HAVE_DIRENT_H

dmake/configure.in

@@ -189,7 +189,7 @@ dnl Initialize libtool
 dnl Checks for header files.
 AC_HEADER_DIRENT
 AC_HEADER_STDC
-AC_CHECK_HEADERS(fcntl.h limits.h strings.h sys/types.h sys/stat.h unistd.h errno.h utime.h spawn.h wait.h sys/wait.h sys/time.h)
+AC_CHECK_HEADERS(fcntl.h limits.h strings.h sys/types.h sys/stat.h unistd.h errno.h utime.h spawn.h wait.h sys/wait.h sys/time.h cygwin/process.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST

dmake/unix/runargv.c

@@ -125,8 +125,12 @@ _finished_child(pid, status) [unix/runargv] handles the finished child. If
 #endif
 
 #if __CYGWIN__ && ENABLE_SPAWN
+#if HAVE_CYGWIN_PROCESS_H
+#  include <cygwin/process.h>
+#else
 #  include <process.h>
 #endif
+#endif
 
 #ifdef __EMX__
 #  include <process.h>