--- Python-3.4.3/setup.py.orig 2015-02-25 05:27:46.000000000 -0600 +++ Python-3.4.3/setup.py 2015-05-05 11:18:04.030880000 -0500 @@ -1763,12 +1772,6 @@ class PyBuildExt(build_ext): include_dirs.append('/usr/X11/include') added_lib_dirs.append('/usr/X11/lib') - # If Cygwin, then verify that X is installed before proceeding - if host_platform == 'cygwin': - x11_inc = find_file('X11/Xlib.h', [], include_dirs) - if x11_inc is None: - return - # Check for BLT extension if self.compiler.find_library_file(lib_dirs + added_lib_dirs, 'BLT8.0'): @@ -1786,9 +1789,8 @@ class PyBuildExt(build_ext): if host_platform in ['aix3', 'aix4']: libs.append('ld') - # Finally, link with the X11 libraries (not appropriate on cygwin) - if host_platform != "cygwin": - libs.append('X11') + # Finally, link with the X11 libraries + libs.append('X11') ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'], define_macros=[('WITH_APPINIT', 1)] + defs,