[CMake] Different configurations for Debug and Release

[David Cole]

On Tue, Jun 8, 2010 at 10:00 AM, Torri, Stephen CIV NSWCDD, W15 <
stephen.torri at navy.mil> wrote:

> > From: Michael Wild [mailto:themiwi at gmail.com]
> > Sent: Tue 6/8/2010 9:05 AM
> > To: Torri, Stephen CIV NSWCDD, W15
> > Cc: cmake at cmake.org
> > Subject: Re: [CMake] Different configurations for Debug and Release
> >
> >
> > > In my project the external libraries I use have the debug library files
> are in a different directory from the release versions. > > I don't think I
> can use target_link_libraries to include a path as well as the name. In
> documentation I would use > > link_directories but there is no way in the
> syntax to distinguish a debug directory from a release directory. I am
> trying > > to generate a Visual Studio project that can build a debug
> release if I select "Debug" in the configuration manager drop > > down menu
> or "Release". Is there a way for me to tell CMake that a certain set of
> directories the linker should use to > > search for files for the debug
> build versus another?
> > >
> > > Stephen
> > >
> >
> > Either use
> >
> > target_link_libraries(<target> debug <debug_lib> optimized <opt_lib>
> general <gen_lib>)
> >
> > or, for more control, create an imported library
> (add_library(<lib_target> IMPORTED)) and set the >
> IMPORTED_LOCATION_<config> target properties to specify the location on the
> disk for each of the configurations > you want to handle.
>
> I did not think that I could use a full path to a library in the
> TARGET_LINK_LIBRARIES. Is that right?


No, that is not right. On the contrary: we recommend that you use full paths
to libraries in target_link_libraries calls.



> I don't think what you suggest will work:
>
>     TARGET_LINK_LIBRARIES ( <target> <child libs> ${Boost_LIBRARIES}
>            ${MYSQLCPPCONNECTOR_LIB_DIR}/debug/mysqlcppconn-static.lib )
>

This should work. Do you have a problem with it if you try it?

You can add debug and optimized versions like this (if those libraries
exist):

    TARGET_LINK_LIBRARIES ( <target> <child libs> ${Boost_LIBRARIES}
           debug ${MYSQLCPPCONNECTOR_LIB_DIR}/debug/mysqlcppconn-static.lib
           optimized
${MYSQLCPPCONNECTOR_LIB_DIR}/release/mysqlcppconn-static.lib )

Then, in multi-configuration generators (VS and Xcode), CMake links debug to
debug and release to release... Or in a makefile based build, the value of
CMAKE_BUILD_TYPE is used to determine which libraries to link to.


HTH,
David



> So I was looking at add_library. I am not sure I get the
> IMPORTED_LOCATION_<config>. First off what can I use for <config>? I tried
> IMPORTED_LOCATION_DEBUG but that gave me an error from cmake-gui saying its
> was an unknown cmake command. The documentation does not clearly define what
> <config> is other than stating its a configuration. Can you provide a simple
> example of what you are suggesting?
>
> Stephen
>
>
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