[CMake] How to link archives (.a) into shared object (.so) with cmake ?

[CHEVRIER, Marc]

Hi,

Shared libraries required position independent code (PIC) for objects.
By default, in CMake, static libraries objects are not compiled with this mode… So your problem.

The easiest solution is to add this line to your CMakeLists.txt file:
Set (CMAKE_POSITION_INDEPENDENT_CODE ON)

Marc




On 17/11/15 11:44, "CMake on behalf of houssen" <cmake-bounces at cmake.org on behalf of houssen at ipgp.fr> wrote:

>Hello,
>
>How to link archives (.a) into shared object (.so) with cmake ?
>
>I have an archive:
>ADD_LIBRARY ( myArchive STATIC ${SRC} )
>That I need to link with a shared object:
>ADD_LIBRARY ( mySharedObject SHARED ${SRC} )
>TARGET_LINK_LIBRARIES ( mySharedObject PUBLIC myArchive )
>I get a compilation error that says "you need to compile with -fPIC !"
>
>As far as I understand, I need to use "-Wl,--whole-archive" : 
>http://stackoverflow.com/questions/7935421/linking-archives-a-into-shared-object-so... 
>But I can't figure out how to do that with CMake. Could someone help ?
>
>Franck
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