* configure.ac: Note that we also need Xt headers as newer distros
tend to package Xt headers separately from core X11.
Signed-off-by: Nelson Ferreira <nelson.ferreira@ieee.org>
dnl make sure we can find Intrinsic.h
AC_CHECK_HEADER([X11/Intrinsic.h], [],
- [AC_MSG_ERROR([Unable to find X11 header files. Try using --x-includes=<path> if you know the path, or --with-x=no to disable X11 support.])])
+ [AC_MSG_ERROR([Unable to find X11 and/or Xt header files. Try using --x-includes=<path> if you know the path, or --with-x=no to disable X11 support.])])
dnl Check some more headers
AC_CHECK_HEADERS([X11/Intrinsic.h X11/StringDefs.h X11/Shell.h X11/ShellP.h],