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[Python-Dev] DLL in the system directory on Windows.
Tim Peterstim_one@email.msn.com
Tue, 4 Apr 2000 01:00:55 -0400
[Guido]> ...> I'm waiting for Tim Peters' response in this thread -- if I recall he> was the one who said that python1x.dll should not go into the system> directory.Not that I don't say a lot of dumb-ass things <wink>, but I strongly doubt Iwould have said this one. In my brief career as a Windows app provider, Ilearned four things, the first three loudly gotten across by seriouslyunhappy users:1. Contra MS guidelines, dump the core DLLs in the system directory.2. Contra MS guidelines, install the app by default in C:\name_of_app\.3. Contra MS guidelines, put all the config options you can in a text file C:\name_of_app\name_of_app.ini instead of the registry.4. This one was due to my boss: Contra MS guidelines, put a copy of every MS system DLL you rely on under C:\name_of_app\, so you don't get screwed when MS introduces an incompatible DLL upgrade.In the end, the last one is the only one I disagreed with (in recent years Ibelieve MS DLL upgrades have gotten much more likely to fix bugs than tointroduce incompatibilities; OTOH, from Tcl to Macsyma Pro I see 6 apps onmy home machine that use their own copy of msvcrt.dll -- /F, if you'rereading, how come the Pythonworks beta does this?).> ...> I've definitely heard people complain that it is evil to install> directories in the system directory. Seems there are different> schools of thought...Well, mucking with the system directories is horrid! Nobody likes doing it.AFAIK, though, there's really no realistic alternative. It's the only placeyou *know* will be on the PATH, and if an app embedding Python can't rely onPATH, it will have to hardcode the Python DLL path itself.> Another issue: MSVCRT.DLL and its friend MSVCIRT.DLL will also go into> the system directory. I will now be distributing with the VC++ 6.0> servicepack 1 versions of these files. Won't this be a problem for> installations that already have an older version? (Now that I think> of it, this is another reason why I decided that at least the alpha> release should install everything in MAINDIR -- to limit the damage.> Any informed opinions?)You're using a std installer, and MS has rigid rules for these DLLs that theinstaller will follow by magic. Small comfort if things break, but this oneis (IMO) worth playing along with.
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