[Python-Dev] MinGW And The other Py2.4 issue (original) (raw)

"Martin v. Löwis" martin at v.loewis.de
Mon Dec 13 23:17:51 CET 2004

Paul Moore wrote:

My current technique for checking an extension is compatible with Python 2.4 is to run objdump -p (from the mingw distribution - use dumpbin /imports from MSVC) and review the import table. If any symbols are referenced from msvcrt.dll, you need to convince yourself that they are used solely by the mingw runtime startup code.

I forgot the details of your analysis, but I think you are right. However, I would feel more comfortable if only a single CRT was used from an extension module.

As for creating a case that crashes if you mix CRTs: Just try PyRun_SimpleFile in the extension, with a file that you fopen'ed in the extension. Satisfy this fopen from, say, msvcrt.dll, and load the extension into Python 2.4.

Regards, Martin

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