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<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">Howdy,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">I’m running into an issue with a custom target dependency that I want to assign to all source files. In this case, I have a helper library (lets call it utils) that builds a couple source
files that each depend on an output file from a separate process. It would look something like this:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">System/libs/utils/CMakeLists.txt:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Show CMake how to build the file we need<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">add_custom_command(<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> OUTPUT<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> out.txt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> DEPENDS<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> C:/in.txt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> COMMAND<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> <makeOutputFileFromInputFile><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Create a target that requires the output file<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">add_custom_target(customTarget DEPENDS out.txt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Create a list of source files<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">set (SOURCE_FILES<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> utils.cpp<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> helpers.cpp<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Make all source files depend on the new target<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">set_source_files_properties(<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> ${SOURCE_FILES}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> OBJECT_DEPENDS<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> customTarget<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Assign source files to utils library, etc.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><…><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">When CMake runs, two folders are created (in the folder bin/obj/system/libs/utils/CMakeFiles). They are called utils.dir and customTarget.dir. In utils.dir, we find our build.make file
and see the rules to produce the compiled object as well as the custom target:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">bin/obj/system/libs/utils/CMakeFiles/build.make:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Miscellaneous assignments at the top<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><…><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Rule to make custom target<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">system/libs/utils/CMakeFiles/customTarget: out.txt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">out.txt: C:/in.txt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> <makeOutputFileFromInputFile><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Rules to make the files<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">system/libs/utils/CMakeFiles/utils.dir/utils.o: customTarget<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> <compilerToBuildObject><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">system/libs/utils/CMakeFiles/utils.dir/helpers.o: customTarget<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"> <compilerToBuildObject><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"># Other rules, assignments, etc.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><…><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">The problem seems to be how the custom target is defined. For the object files, its simply the target name. The target itself appears to have a fully qualified path. This is giving me the
following error:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">gmake[2]: *** No rule to make target `customTarget, needed by ` system/libs/utils/CMakeFiles/utils.dir/helpers.o'. Stop.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">If I manually edit the make file and change the target to the fully qualified name (and manually execute make) then the compilation succeeds. Is there something that I am doing wrong that
is incorrectly assigning the target name? Is there an alternative to the “set_source_files_properties” command that would behave better?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:darkgreen">Thank you in advance for your help!<o:p></o:p></span></p>
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