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<div><span class="314141621-02022010"><font face="Arial" size="2">My current project has many components that need to be built. Some portions of our code depend on others and using add_subdirectory, I am having an issue where I get multiple of my targets loaded
causing a faliure.</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2"></font></span> </div>
<div><span class="314141621-02022010"><font face="Arial" size="2">I placed the add_subdirectory in a macro that uses a simple hash style of access</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2"></font></span> </div>
<div><span class="314141621-02022010"><font face="Arial" size="2">set ( BUILD_MAP_${_name} 1 ) where ${_name} is the target name.</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2"></font></span> </div>
<div><span class="314141621-02022010"><font face="Arial" size="2">I have an if statement in the macro that tests if BUILD_MAP_${_name} is defined. The issue is say I have a custom mysqlclient that is used by 3 of my projects that are all built as part of "all".</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2"></font></span> </div>
<div><span class="314141621-02022010"><font face="Arial" size="2">Project A: Depends on Mysqlclient</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2">Project B: Depends on Mysqlclient</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2">Project C: Depends on Mysqlclient</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2"></font></span> </div>
<div><span class="314141621-02022010"><font face="Arial" size="2">Dir structure</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2">all/</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2"> /lib/Mysqlclient</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2"> /bin/Project A</font></span></div>
<div><span class="314141621-02022010"><font face="Arial" size="2">
<div><span class="314141621-02022010"><font face="Arial" size="2"> /bin/Project B</font></span></div>
<div><span class="314141621-02022010">
<div><span class="314141621-02022010"><font face="Arial" size="2"> /bin/Project C</font></span></div>
<div><span class="314141621-02022010"></span> </div>
<div><span class="314141621-02022010">each of these folders have a CMakeLists.txt. The all/CMakeLists.txt has the following</span></div>
<div><span class="314141621-02022010"></span> </div>
<div><span class="314141621-02022010">project(all)</span></div>
<div><span class="314141621-02022010">add_subdirectory(lib/Mysqlclient)</span></div>
<div><span class="314141621-02022010">add_subdirectory(<span class="314141621-02022010"><font face="Arial" size="2">bin/Project A)</font></span></span></div>
<div><span class="314141621-02022010"><span class="314141621-02022010">
<div><span class="314141621-02022010">add_subdirectory(<span class="314141621-02022010"><font face="Arial" size="2">bin/Project B)</font></span></span></div>
<div><span class="314141621-02022010"><span class="314141621-02022010">
<div><span class="314141621-02022010">add_subdirectory(<span class="314141621-02022010"><font face="Arial" size="2">bin/Project C)</font></span></span></div>
<div><span class="314141621-02022010"><span class="314141621-02022010"></span></span> </div>
<div><span class="314141621-02022010"><span class="314141621-02022010">When building from the top level and having a definition of "-lmysqlclient" everything works as expected. The issue comes up when I do not want to build all of the source.</span></span></div>
<div><span class="314141621-02022010"><span class="314141621-02022010"></span></span> </div>
<div><span class="314141621-02022010"><span class="314141621-02022010">Say I would like to build only Project B.</span></span></div>
<div><span class="314141621-02022010"><span class="314141621-02022010"></span></span> </div>
<div><span class="314141621-02022010"><span class="314141621-02022010">from my build directory, I would run cmake ~/all/Project B.</span></span></div>
<div><span class="314141621-02022010"><span class="314141621-02022010"></span></span> </div>
<div><span class="314141621-02022010"><span class="314141621-02022010">The cmake process ends without issue, but the make fails on link due to the missing Mysqlclient library not being built. I want to be able to declare dependencies for each project that way
I can build each seperately from the top level. So far using a macro to do the add_subdirectory fails because even though I check to see if BUILD_MAP_${_name} is defined, the add_subdirectory command is still run as if the BUILD_MAP_${_name} is not defined
(if defined, only an add_dependencies should be run)</span></span></div>
<div><span class="314141621-02022010"><span class="314141621-02022010"></span></span> </div>
<div><span class="314141621-02022010"><span class="314141621-02022010">Any help would be greatly appreciated.</span></span></div>
</span></span></div>
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