[CMake] Override of link flag for one specific shared library

[David Cole]

Are you using SUBDIRS or ADD_SUBDIRECTORY in your project...?


On Thu, Sep 4, 2008 at 2:42 AM, Martin Apel <martin.apel at simpack.de> wrote:

> Unfortunately this does not work. It seems that CMake generates all
> libraries defined in one CMakeLists.txt with the setting of
> CMAKE_SHARED_LINKER_FLAGS at the end of the file.
> This causes this setting to be applied to all libraries in the
> CMakeLists.txt. As I have 4 libraries in this one CMakeLists.txt, this
> doesn't help much.
>
> I tried to do something like the following:
> SET (CMAKE_SHARED_LINKER_FLAGS "${ORIG_SHARED_LINKER_FLAGS}")
> ADD_LIBRARY (FortranInterface ${OBJS})
> SET (CMAKE_SHARED_LINKER_FLAGS "${MODIFIED_SHARED_LINKER_FLAGS}")
> but the FortranInterface library gets built with
> MODIFIED_SHARED_LINKER_FLAGS in effect.
>
> I would suggest to change the order of items in the build rules for a
> future CMake release, such that it's possible to override general flags
> with a target specific property. Today the link
> rules look as follows:
> SET(CMAKE_CXX_CREATE_SHARED_LIBRARY "<CMAKE_CXX_COMPILER> ...
> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> ....")
> From my point of view it would be better to put LINK_FLAGS to the end of
> the list (not only for shared libraries, but in general).
>
> Regards,
>
> Martin
>
> David Cole wrote:
> > Maybe save and restore the CMAKE_SHARED_LINKER_FLAGS around your reset
> > of it in the sub-CMakeLists.txt...?
> >
> >
> > On Wed, Sep 3, 2008 at 10:41 AM, Martin Apel <martin.apel at simpack.de
> > <mailto:martin.apel at simpack.de>> wrote:
> >
> >     Hi,
> >
> >     I have defined the following in a top-level CMakeLists.txt:
> >      SET (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}
> >     -Wl,--unresolved-symbols=ignore-in-shared-libs")
> >
> >     Now I'd like to reset this for one specific library in a subdirectory
> >     (in a separate CMakeLists.txt added with ADD_SUBDIRECTORY to the main
> >     CMakeLists.txt). I tried to use
> >      SET_TARGET_PROPERTIES (FortranInterface PROPERTIES LINK_FLAGS
> >     -Wl,--unresolved-symbols=ignore-in-object-files")
> >     which reverses the effect of "ignore-in-shared-libs".
> >     Unfortunately the
> >     linker rule contains the LINK_FLAGS before
> >     CMAKE_SHARED_LINKER_FLAGS, so
> >     this cannot be used to override the setting. I have also tried
> >     resetting
> >     CMAKE_SHARED_LINKER_FLAGS in the sub-CMakeLists.txt, but then it
> >     applies
> >     to all other
> >     libraries handled in this CMakeLists.txt as well.
> >
> >     Any ideas, how I can solve this problem?
> >
> >     Regards,
> >
> >     Martin
> >
> >     ____________
> >     Virus checked by G DATA AntiVirus
> >     Version: AVF 19.21 from 03.09.2008
> >
> >
> >     _______________________________________________
> >     CMake mailing list
> >     CMake at cmake.org <mailto:CMake at cmake.org>
> >     http://www.cmake.org/mailman/listinfo/cmake
> >
> >
>
>
> --
>
> Martin Apel                                     Tel:     0049 8153 9288-47
> Software Architect                              E-Mail:
> martin.apel at simpack.de
>
> INTEC GmbH                                      Tel:     0049 8153 9288-0
> Argelsrieder Feld 13                            Fax:     0049 8153 9288-11
> 82234 Wessling                                  E-Mail:  intec at simpack.de
> Germany                                         URL:
> http://www.simpack.com
>
> ____________
> Virus checked by G DATA AntiVirus
> Version: AVF 19.22 from 03.09.2008
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.cmake.org/pipermail/cmake/attachments/20080906/b221945d/attachment.htm>