Hi,

I've committed the attached patch which should fix any problems with 
building libgui on cygwin. At least, it builds on *my* cygwin box.

NOTE: Not tested (and probably won't work) with mingw!

Please let me know (via this list) if there are any problems.

Keith

ChangeLog
2008-08-02  Keith Seitz  <keiths@redhat.com>

         * tcl.m4: Remove. I changed my mind.
         * acinclude.m4: Include ../config/tcl.m4.
         (CY_AC_TCL_PRIVATE_HEADERS): New macro.
         (CY_AC_TK_PRIVATE_HEADERS): New macro.
         * configure.ac: When using in-tree tcl/tk, include
         Tcl's/Tk's platform directory.
         When using installed Tcl/Tk, use CY_AC_{TCL,TK}_PRIVATE_HEADERS
         to find the private header files.
         * aclocal.m4: Regenerated.
         * configure: Regenerated.
         * library/Makefile.in: Regenerated.
         * src/Makefile.in: Regenerated.