Yes this looks like an option. Thanks for the lead. It is not quite
what I was expecting.
This seems specific to Boost Libraries. Which brings up 2 questions:
Is there a generic way do this for any third party source tree?
Is there going to be CMAKE variable name resolution clash potential
without namespace resolution within CMake (or is there already this
problem or have I missed something)?
What I would like to do is set (please bear with me as I am a complete
nube to CMake)
BUILD_PROJECTS=none
Then do
add_subdirectory(boost_source_dir)
project( my_exe )
add_executable( my_exe mysource.cpp )
add_library( boost_filesystem SHARED)
#An IMPORTED library target references a library file located outside
the project. No rules are generated to build it. <- Too bad about this
last statement
or
add_dependencies( my_exe boost_filesystem )
Is there any mechanism for project level resolution of third party
source targets such as in bjam boost//boost_filesystem
project
: requirements <library>../build//boost_filesystem
<library>/boost/system//boost_system
<hardcode-dll-paths>true
;
project boost/filesystem
: source-location ../src
: usage-requirements # pass these requirement to dependents (i.e.
users)
<link>shared:<define>BOOST_FILESYSTEM_DYN_LINK=1
<link>static:<define>BOOST_FILESYSTEM_STATIC_LINK=1
;
And boost_filesystem's use:
project
: requirements
<library>/boost/filesystem//boost_filesystem
<toolset>msvc:<asynch-exceptions>on
;
where some syntax like:
add_subdirectory(boost_source_dir PROJECT boost )
add_dependencies( my_exe boost//boost_filesystem )
or
add_library( boost//boost_filesystem SHARED)
allowing the specification and namespace resolution of the 3rdParty
(boost) library
I know above does not exist as my example question shows, but if it
does in some other form what is it?
Brian
On Sat, Dec 5, 2009 at 3:45 PM, Mike Jackson <mike.jack...@bluequartz.net
> wrote:
I _think_ you _might_ be able to set the BUILD_PROJECTS to
"file_system;system" then do the "add_subdirectory()".
Give it a shot and see what happens.
_________________________________________________________
Mike Jackson mike.jack...@bluequartz.net
BlueQuartz Software www.bluequartz.net
Principal Software Engineer Dayton, Ohio
On Sat, Dec 5, 2009 at 4:15 PM, Brian Davis <bitmi...@gmail.com> wrote:
>
> I have used boost jam before and there was a mechanism to build
only what
> you need by specifying dependencies within the boost libraries.
bjam would
> then run off calculate deps and build only what I needed. In CMake
is there
> such a feature to specify a third party library and specify only
the targets
> you need to build as dependencies of my build target?
>
> i.e. can I use
>
> add_subdirectory( lib/3rdParty/Win32/boost-cmake-1_41_0 ./boost )
>
> then create a target that only uses say boost_filesystem and only
have that
> built? Or do I need to build the world to get a handful of needed
dll's that
> are actually used in my project?
>
> --
> Brian J. Davis
>
>
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--
Brian J. Davis
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