configure.ac: Error out if with-file-notification=w32 is specified on Cygwin

Fixes: 19909

Copyright-paperwork-exempt: yes

2 files changed, 10 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 0bfdfbbd8b9..5e5c922fd45 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-03-02  Robert Pluim  <rpluim@gmail.com>  (tiny change)
+
+        * configure.ac: Error out if with-file-notification=w32 is
+        specified on Cygwin.  (Bug#19909)
+
 2015-02-27  Paul Eggert  <eggert@cs.ucla.edu>
 
         Don't require GNU putenv
diff --git a/configure.ac b/configure.ac
index e7408f11ed4..d65494ac675 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2664,6 +2664,11 @@ fi
 
 dnl MS Windows native file monitor is available for mingw32 only.
 case $with_file_notification,$opsys in
+  w32,cygwin)
+    AC_MSG_ERROR([`--with-file-notification=w32' was specified, but
+    this is only supported on MS-Windows native and MinGW32 builds.
+    Consider using gfile instead.])
+    ;;
   w32,* | yes,mingw32)
     AC_CHECK_HEADER(windows.h)
     if test "$ac_cv_header_windows_h" = yes ; then