Re: "Windows Programing" beginner questions concerning libraries

From:
David Lowndes <DavidL@example.invalid>
Newsgroups:
microsoft.public.vc.language
Date:
Sun, 17 Aug 2008 14:56:20 +0100
Message-ID:
<kuaga4dkr0imsms5evunutv5eehobcnk98@4ax.com>

* when I build a library which should be linked statically, should I
use -MD or -MT?


MT is for the multi-threaded statically linked 'C' run-time library.
If you're linking to a library which uses -MT itself, you would
normally use -MT as well.

* when I build a DLL, should I use -MR or -MT? Does -MT actually make
sense when building a DLL?


-MT is OK to use with a DLL provided that the programmatic interface
to the functions in the DLL doesn't assume sharing of 'C' run-time
data across the boundary - things like allocating memory in the DLL
and trying to free it from the EXE won't work.

* When I start a new project using the Project Wizard of VS2008 for a
static library it uses -MD by default. Why? Is -MD in any sense
"better" to -MT?


It ensures that people building an EXE & DLL won't fall fowl of the
situation I mentioned above.

* When building boost from source it produces static libraries
libboost_*-mt.lib, so I guess those are linked using -MT


I'd assume so from the names.

* I tryed building Qt 4.4.1, which builds DLLs and also uses png,
tiff, jpeg. Should I provided a png.dll/... for Qt or should I
provided static libraries? If static libraries, should I use -MT or -
MD to build them?


I'm afraid I've no experience of Qt.

Dave

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