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C++

Should it be possible to make a dynamic library that does not link with any static library?

Posted 10-Aug-10 19:39pm

gauravgarg_miet

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3 solutions

Solution 1

Aren't, by default, DLLs as such?

Posted 10-Aug-10 21:08pm

CPallini

Solution 3

Hm, a dll does not link to any static library unless you advise it to do so...

Posted 14-Aug-10 1:44am

Paul Michalik

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Emilio Garavaglia · Accepted Answer · 2010-08-10T21:09:00

Technically yes: but you must meet these points

your code must be self-cotained (no need to use language libraty functions
If you need some OS API, you must import dynamically the operating system DLL (via LoadLibrary and GetProcAddrss)
Your language must not require pre-initialization or post-termination code. (C++ is not suitable for that, unless disabling those features, but this means "no static and global objects", since they will not be properly constructed / deleted
Your compiler must be able to generate code forwatever construct (never translate it in some runtime-library function call: C++ sometimes require the CRT, C can do without it, but only in certain condiction: no FILE operation)

In other word, if the compiler requires part of the code to be "precomposed" and not "generated on the fly", it is quite hard to eliminate a runtime-library.

Note that -even if the CRT is linked as DLL- a import library is in any case needed, since you cannot load it in DllMain, since part of it must be executed before.
It is a damn "chicken and egg" problem!