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

[Martin Apel]

I am using ADD_SUBDIRECTORY. I did'nt know, that anything like SUBDIRS
exists and haven't found anything in the documentation about it.

Martin


David Cole wrote:
> 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
> <mailto: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>
>     > <mailto: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>
>     <mailto: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 <mailto: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 <mailto:intec at simpack.de>
>     Germany                                         URL:    
>     http://www.simpack.com
>
>     ____________
>     Virus checked by G DATA AntiVirus
>     Version: AVF 19.22 from 03.09.2008
>
>
>


____________
Virus checked by G DATA AntiVirus
Version: AVF 19.27 from 07.09.2008