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Fixed bug 4034 - Do we really need _DllMainCRTStartup() in every Windows build? 

Andreas Falkenhahn

In src/SDL.c there is this code:

_DllMainCRTStartup(HANDLE hModule,

...

The comment says that this is needed on Watcom C for some reason but why is it included then when building with Visual C as well? Shouldn't it be only included when compiling on Watcom C then?

I'm asking because this code caused me a lot of headaches because I'm building a DLL that contains SDL and I link using /MT and the _DllMainCRTStartup() symbol obviously led to lots of trouble but it wasn't clear to me where the problem was because all I got from the linker was:

LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup

So I had to got through each and every object to see what the culprit was. See here for the full story:
https://stackoverflow.com/questions/25067151/lnk2019-unresolved-external-symbol-main-referenced-in-function-tmaincrtstar/48177067#48177067

So if it isn't necessary on Visual C, please just leave that symbol out on Visual C so that it no longer leads to any trouble. Thanks.
This commit is contained in:
Sam Lantinga 2018-02-18 08:57:01 -08:00
parent 75a58303a0
commit 3c9d33361c
1 changed files with 1 additions and 5 deletions
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6
src/SDL.c
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@ -451,9 +451,7 @@ SDL_GetPlatform()
#endif
}
#if defined(__WIN32__)
#if !defined(HAVE_LIBC) || (defined(__WATCOMC__) && defined(BUILD_DLL))
#if defined(__WIN32__) && defined(__WATCOMC__) && defined(BUILD_DLL)
/* Need to include DllMain() on Watcom C for some reason.. */
BOOL APIENTRY
@ -471,6 +469,4 @@ _DllMainCRTStartup(HANDLE hModule,
}
#endif /* building DLL with Watcom C */
#endif /* __WIN32__ */
/* vi: set sts=4 ts=4 sw=4 expandtab: */