[CMake] Setting dependencies between libraries (cmake projects)

[Ludovic Hoyet]

Thanks, it solved it.

I thought that using set(a project_a) then using ${a} would be the same
than using project_a (therefore I could use the same variable everywhere
and simply change the target name in the set). But it seems it is not the
same.

Thanks for you help :D. I will have another question later, but it will be
for a different thread.

Ludo

2011/11/4 Michael Wild <themiwi at gmail.com>

>
> On 11/04/2011 11:07 AM, Ludovic Hoyet wrote:
> [fixed top-post]
> >
> > 2011/11/4 Michael Wild <themiwi at gmail.com <mailto:themiwi at gmail.com>>
> >
> >     On 11/04/2011 10:47 AM, Ludovic Hoyet wrote:
> >     > Hi,
> >     >
> >     > I am using cmake to build an application made up of a dozen
> >     projects. We
> >     > use cmake to automatically generate solutions for x86, x64, and
> >     both VS
> >     > 2005 and 2010.
> >     >
> >     > Here is an idea of our organisation:
> >     >
> >     >   * a.lib, which has no dependency
> >     >   * b.lib, which has no dependency
> >     >   * c.lib, which depends on a and b
> >     >   * d.dll, which depends on c
> >     >
> >     > Each project lies in its own subdirectory, and has its own
> >     > CMakeLists.txt file. In order to keep track of the lib/dll
> >     generated for
> >     > our different platforms, we automatically post-fix each lib/dll
> with
> >     > _x86/_x64 and _vc80/_vc100 (e.g., a_x86_vc100.lib), and with an _d
> for
> >     > debug (e.g., a_x86_vc100_d.lib).
> >     >
> >     > In the CMakeLists.txt files, I use target_link_libraries to link
> each
> >     > target with the corresponding libraries, for instance:
> >     >
> >     >     TARGET_LINK_LIBRARIES( c debug a_${VS}_${PLATFORM}/d optimized
> >     >     a/${VS_DIR}/${PLATFORM} debug b/${VS}_${PLATFORM}/d optimized
> >     >     b/${VS_DIR}_${PLATFORM})
> >     >
> >     > In Visual Studio, the different "Project Dependencies" between the
> >     > various projects do not appear. I wonder if there is something I
> miss,
> >     > or if it is simply not compatible with our library post-fix. I also
> >     > tried to use ADD_DEPENDENCIES(c a b) but it does not seem to work
> >     either.
> >     >
> >     > Does anyone has an idea how to solve this?
> >     >
> >     > Cheers,
> >     >
> >     > Ludovic
> >
> >
> >     Are these projects completely isolated, i.e. there is no higher-level
> >     CMakeLists.txt file that calls add_subdirectory() for each of the
> >     project directories?
> >
> >     1: if they belong to the same project, then you should use the
> *target*
> >     names, not the *output* names in target_link_libraries().
> >
> >     2: if they indeed are independent projects, you should take a look at
> >     this:
> >
> http://www.cmake.org/Wiki/CMake/Tutorials/How_to_create_a_ProjectConfig.cmake_file
> >     and for each of the libraries create a <libname>Config.cmake file.
> >
> >     A bit more information on how your projects are structured would
> help.
> >     Also, showing example code is always useful.
> >
> >     HTH
> >
> >     Michael
> >
> > No, they all belong to a higher-level project. There is a root directory
> > with a CMakeLists.txt. This file calls ADD_SUBDIRECTORY(dir_i) for each
> > subproject (a, b, c and d). Each sub-project is in his own directory,
> > with a CMakeLists.txt for each of them.
> >
> > Root : CMakeLists.txt
> >   - dir_a :  CMakeLists.txt
> >   - dir_b :  CMakeLists.txt
> >   - dir_c :  CMakeLists.txt
> >   - dir_d :  CMakeLists.txt
> >
> > In the root CMakeLists.txt I call
> >   ADD_SUBDIRECTORY(dir_a)
> >   ADD_SUBDIRECTORY(dir_b)
> >   ADD_SUBDIRECTORY(dir_c)
> >   ADD_SUBDIRECTORY(dir_d)
> >
> > My a CMakeLists contains:
> > SET(a project_a)
> > add_library(${a} ${SRCS_a} ${HDRS_a})
> > SET_TARGET_PROPERTIES(${a} PROPERTIES OUTPUT_NAME ${a} DEBUG_POSTFIX
> > "_${VS_DIR}_${PLATFORM}_d" RELEASE_POSTFIX "_${VS_DIR}_${PLATFORM})
> >
> > My c CMakeLists contains:
> > SET(c project_c)
> > add_library(${c} ${SRCS_c} ${HDRS_c})
> > ADD_DEPENDENCIES( ${c} ${a} )
> >
> > I hope it is clearer now and that I provided the required information...
> >
> > Ludo
>
> Your c/CMakeLists.txt should look like this:
>
> set(c project_c)
> add_library(${c} ${SRCS_c} ${HDRS_c})
> target_link_libraries(${c} project_a project_b)
>
>
> In CMake you should always use *target* names, CMake handles the rest
> for you. Also, the dependencies will be automagically handles this way.
>
>
> Michael
>



-- 
_______________________________________

Ludovic Hoyet
Research Fellow,
Graphics Vision and Visualisation group,
Trinity College Dublin
http://www.scss.tcd.ie/~hoyetl/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.cmake.org/pipermail/cmake/attachments/20111104/13416d3b/attachment.htm>