[CMake] Lib prefix: Windows vs. Unix/MinGW convention

[Robert Maynard]

>Why isn't CMake doing that by default? The convention of the target
platform should prevail over the convention of the toolchain, shouldn't it?'

CMake considers the target platform to be composed of the OS, and the
compilation toolchain. Therefore MINGW uses the 'lib' prefix.

> 2. Should I use if(WIN32) rather than if(MINGW)?

No if you are using a Microsoft compiler/toolchain than the prefix is
already empty.

On Tue, Jul 10, 2018 at 3:27 AM Olivier Croquette <ocroquette at free.fr>
wrote:

> Hello,
>
> some projects I am working on are built using CMake and MinGW on
> Windows. It works fine, unfortunately there are come inconsistencies
> regarding the names of the generated libraries. Some are prefixed with
> "lib" like on Unix systems, some are not, like usual on Windows.
>
> It seems that this can be controlled easily by adding the following
> lines in the top CMakeLists.txt:
>
> if(MINGW)
>    set(CMAKE_SHARED_LIBRARY_PREFIX "")
>    set(CMAKE_STATIC_LIBRARY_PREFIX "")
> endif()
>
> As a CMake beginner, I still have some questions though:
>
> 1. Are there some side-effects? For instance, can it cause libraries not
> to be found when using them across projects?
>
> 2. Should I use if(WIN32) rather than if(MINGW)?
>
> 3. Why isn't CMake doing that by default? The convention of the target
> platform should prevail over the convention of the toolchain, shouldn't it?
>
> Thanks!
>
> Olivier
>
>
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