On 2008-11-28 00:15, Christian Heimes wrote: > Martin v. Löwis wrote: >>> All, and not to start flames, but I still do not understand why >>> applink.c isn't included in python's main (conditionally) instead of >>> expecting users, many of them novices, to do the build. ??? >> >> One reason is that I don't know what applink is, and why I should >> care about it. (I may have known in the past, but then I have forgotten >> since). > > Applink is roughly explained at > http://www.openssl.org/support/faq.html#PROG2. The matter was discussed > about half a year ago but no decision was made. See > http://mail.python.org/pipermail/python-dev/2008-March/077424.html > > applink.c is just a table of integer constants to function pointers. It > makes mixing of different CRTs secure. You'll get the idea after reading > the file, Martin. A similar approach could be useful for Python, too.
So that's why we don't see a problem with pyOpenSSL. From the first link: """ Your application must link against the same version of the Win32 C-Runtime against which your openssl libraries were linked. The default version for OpenSSL is /MD - "Multithreaded DLL". """ and later on: """ As per 0.9.8 the above limitation is eliminated for .DLLs. ... Instead of re-compiling OpenSSL toolkit, ...[you have to add] <install-root>/include/openssl/applink.c ... to your application project or simply #include-d in one [and only one] of your application source files. ... [Note that] it is as important to add CRYPTO_malloc_init prior first call to OpenSSL. """ In our eGenix pyOpenSSL distribution we ship the Windows DLLs for OpenSSL together with the compiled PYDs for pyOpenSSL - all compiled using the same compiler settings. Python for Windows does the same, so there should be no issue either. >From the comment it appears that you only see problems, if you try to use those extensions from a Python executable that was compiled using different settings, e.g. an embedded Python interpreter. Note that neither Python nor pyOpenSSL call the required CRYPTO_malloc_init() prior to using the other SSL APIs, so even including applink.c would not help - you have to add this call to the used extensions as well. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Nov 28 2008) >>> Python/Zope Consulting and Support ... http://www.egenix.com/ >>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ 2008-11-12: Released mxODBC.Connect 0.9.3 http://python.egenix.com/ :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! :::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
