[CMake] Suppressing -rdynamic

[Filip Brcic]

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Дана субота 06 октобар 2007, Gonzalo Garramuño је написао(ла):
> Filip Brcic wrote:
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> > Дана субота 06 октобар 2007, Gonzalo Garramuño је написао(ла):
> >>> Therefore, you have to override CMAKE_SHARED_LIBRARY_LINK_C_FLAGS and
> >>> set it to blank. Something like:
> >>>
> >>> SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
>
> CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS seems to be the key for c++.  Have
> not been able to guess where that is set thou.

Yes, you are right. I made a new "advanced" version of my helloWorld++ (tm) 
program using C++ (and cout for output) and it did include -rdynamic when 
linking. But, after I added set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "") the 
problem dissapeared. Nice catch :)

And, here is where that is comming from:

[brcha at sirius Modules]$ grep CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS *
CMakeCXXInformation.cmake:IF(NOT CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)
CMakeCXXInformation.cmake:  SET(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS 
${CMAKE_SHARED_LIBRARY_LINK_C_FLAGS})
CMakeCXXInformation.cmake:ENDIF(NOT CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS)

Since that is evaluated in enable_language(CXX) (I guess), it uses the system 
CMAKE_SHARED_LIBRARY_LINK_C_FLAGS variable and not the CMakeFiles.txt 
version. For Fortran you should override 
CMAKE_SHARED_LIBRARY_LINK_Fortran_FLAGS in the same way.

- -- 
Filip Brcic <brcha at users.sourceforge.net>
WWWeb: http://purl.org/NET/brcha/home/
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