On 27/08/2026 19:28, Marco Atzeri via Cygwin wrote:
Noted building python39 on scallywag
$ grep "X11" /usr/include/tk.h
#if !defined(_XLIB_H) && !defined(_X11_XLIB_H_)
# include <X11/Xlib.h>
# include <X11/X.h>
should not depend on libX11-devel ?
cygcheck -f /usr/include/X11/Xlib.h
libX11-devel-1.8.13-1
Note that the code snippet above (as shown) says to include libX11 headers
if not already included.
Thus unless there is another #if condition in the actual tk.h file, all use
of that header will need the X11 headers to either be in their standard
location or be already included beforetk.h .
Unfortunately, blindly running grep on a header file gives insufficient
context to determinecompile time needs, although the following command
may be helpful to those whounderstand the C preprocessor:
$ egrep '^[[:space:]]*#' /usr/include/tk.h
Enjoy
Jakob
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