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Added answer by Greg Stein about threads on Linux.

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Guido van Rossum 1996-10-23 20:52:55 +00:00
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@ -106,16 +106,17 @@ Here's an overview of the questions per chapter:
3.10. Q. Other trouble building Python on platform X.
3.11. Q. How to configure dynamic loading on Linux.
3.12. Q: I can't get shared modules to work on Linux 2.0 (Slackware96)?
3.13. Q. Errors when linking with a shared library containing C++ code.
3.14. Q. I built with tkintermodule.c enabled but get "Tkinter not found".
3.15. Q. I built with Tk 4.0 but Tkinter complains about the Tk version.
3.16. Q. Link errors for Tcl/Tk symbols when linking with Tcl/Tk.
3.17. Q. I configured and built Python for Tcl/Tk but "import Tkinter"
3.13. Q. How to use threads on Linux.
3.14. Q. Errors when linking with a shared library containing C++ code.
3.15. Q. I built with tkintermodule.c enabled but get "Tkinter not found".
3.16. Q. I built with Tk 4.0 but Tkinter complains about the Tk version.
3.17. Q. Link errors for Tcl/Tk symbols when linking with Tcl/Tk.
3.18. Q. I configured and built Python for Tcl/Tk but "import Tkinter"
fails.
3.18. Q. Tk doesn't work right on DEC Alpha.
3.19. Q. Several common system calls are missing from the posix module.
3.20. Q. ImportError: No module named string, on MS Windows.
3.21. Q. Core dump on SGI when using the gl module.
3.19. Q. Tk doesn't work right on DEC Alpha.
3.20. Q. Several common system calls are missing from the posix module.
3.21. Q. ImportError: No module named string, on MS Windows.
3.22. Q. Core dump on SGI when using the gl module.
4. Programming in Python
4.1. Q. Is there a source code level debugger with breakpoints, step,
@ -788,13 +789,26 @@ so that the following links are setup:
/lib/libdl.so -> /lib/libdl.so.1
/lib/libdl.so.1 -> /lib/libdl.so.1.7.14
3.13. Q. Errors when linking with a shared library containing C++ code.
3.13. Q. How to use threads on Linux.
A. [Greg Stein] I built myself a libpthreads.so from the libc.5.3.12
distribution (the binary distribution doesn't have pthreads in
it). Then, I configured Python with --with-threads and then tweaked
config.h to include a #define _MIT_POSIX_THREADS (or something like
that, see /usr/include/pthreads.h). It worked fine at that point.
Note that I couldn't get threading to "operate well" with any of the
other thread packages. Prior libc versions didn't integrate well with
threads, either, so I couldn't use them (e.g. sleep() blocked all
threads :-( ).
3.14. Q. Errors when linking with a shared library containing C++ code.
A. Link the main Python binary with C++. Change the definition of
LINKCC in Modules/Makefile to be your C++ compiler. You may have to
edit config.c slightly to make it compilable with C++.
3.14. Q. I built with tkintermodule.c enabled but get "Tkinter not found".
3.15. Q. I built with tkintermodule.c enabled but get "Tkinter not found".
A. Tkinter.py (note: upper case T) lives in a subdirectory of Lib,
Lib/tkinter. If you are using the default module search path, you
@ -802,7 +816,7 @@ probably didn't enable the line in the Modules/Setup file defining
TKPATH; if you use the environment variable PYTHONPATH, you'll have to
add the proper tkinter subdirectory.
3.15. Q. I built with Tk 4.0 but Tkinter complains about the Tk version.
3.16. Q. I built with Tk 4.0 but Tkinter complains about the Tk version.
A. Several things could cause this. You most likely have a Tk 3.6
installation that wasn't completely eradicated by the Tk 4.0
@ -813,7 +827,7 @@ have compiled Python with the old tk.h header file (yes, this actually
compiles!); you may actually have linked with Tk 3.6 even though Tk
4.0 is also around. Similar for Tcl 7.4 vs. Tcl 7.3.
3.16. Q. Link errors for Tcl/Tk symbols when linking with Tcl/Tk.
3.17. Q. Link errors for Tcl/Tk symbols when linking with Tcl/Tk.
Quite possibly, there's a version mismatch between the Tcl/Tk header
files (tcl.h and tk.h) and the tck/tk libraries you are using (the
@ -824,13 +838,13 @@ Setup line for _tkinter in some Python distributions references
7.4/4.0 by default. Changing this to 7.5/4.1 should take care of
this.
3.17. Q. I configured and built Python for Tcl/Tk but "import Tkinter"
3.18. Q. I configured and built Python for Tcl/Tk but "import Tkinter"
fails.
A. Most likely, you forgot to enable the line in Setup that says
"TKPATH=:$(DESTLIB)/tkinter".
3.18. Q. Tk doesn't work right on DEC Alpha.
3.19. Q. Tk doesn't work right on DEC Alpha.
A. You probably compiled either Tcl, Tk or Python with gcc. Don't.
For this platform, which has 64-bit integers, gcc is known to generate
@ -842,7 +856,7 @@ far as we know, there are no problem with gcc on other platforms --
the instabilities seem to be restricted to the DEC Alpha.) See also
question 3.6.
3.19. Q. Several common system calls are missing from the posix module.
3.20. Q. Several common system calls are missing from the posix module.
A. Most likely, *all* test compilations run by the configure script
are failing for some reason or another. Have a look in config.log to
@ -850,7 +864,7 @@ see what could be the reason. A common reason is specifying a
directory to the --with-readline option that doesn't contain the
libreadline.a file.
3.20. Q. ImportError: No module named string, on MS Windows.
3.21. Q. ImportError: No module named string, on MS Windows.
A. Most likely, your PYTHONPATH environment variable should be set to
something like:
@ -859,7 +873,7 @@ set PYTHONPATH=c:\python;c:\python\lib;c:\python\scripts
(assuming Python was installed in c:\python)
3.21. Q. Core dump on SGI when using the gl module.
3.22. Q. Core dump on SGI when using the gl module.
There are conflicts between entry points in the termcap and curses
libraries and an entry point in the GL library. There's a hack of a