[Python-Dev] [C++-sig] GCC version compatibility (original) (raw)

Christoph Ludwig cludwig at cdc.informatik.tu-darmstadt.de
Sun Jul 17 12:06:09 CEST 2005

On Sun, Jul 17, 2005 at 04:01:20PM +1000, Anthony Baxter wrote:

On Saturday 16 July 2005 20:13, Christoph Ludwig wrote: > I submitted patch #1239112 that implements the test involving two TUs for > Python 2.4. I plan to work on a more comprehensive patch for Python 2.5 but > that will take some time.

I'm only vaguely aware of all of the issues here with linking, but if this is to be considered for 2.4.2, it needs to be low risk of breaking anything. 2.4.2 is a bugfix release, and I'd hate to have this break other systems that work...

I prepared the patch for 2.4.2 since it is indeed a bugfix. The current test produces wrong results if the compiler is GCC 4.0 which inhibits a successful build of Python 2.4.

I tested the patch with GCC 2.95, 3.3 and 4.0 - those are the only compilers I have easy access to right now. I do not see how this patch could cause regressions on other platforms because it mimics the situation w.r.t. ccpython.cc: A C++ translation unit calls from main() an extern "C" function in a separate C translation unit. The test determines whether it is possible to produce an intact executable if the C compiler is used as linker driver. If this test causes problems on some platform then you'd expect trouble when linking the python executable out of ccpython.o and all the other C object modules anyway.

But, of course, I might be wrong. I do not claim that I am familiar with every platform's peculiarities. That's why the patch is up for review. I'd appreciate if users on other platforms test it.

Regards

Christoph

http://www.informatik.tu-darmstadt.de/TI/Mitarbeiter/cludwig.html LiDIA: http://www.informatik.tu-darmstadt.de/TI/LiDIA/Welcome.html

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