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POUsing cmake's automoc on external header files without knowing their filenames
 

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  1. POUsing cmake's automoc on external header files without knowing their filenames
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    <p>In essence I want to be able to moc header files that are not part of any target in cmake with the additional difficulty that I don't know the filenames of those headers.</p> <p>The actual project is quite complex and part of an automated build system. The following is an easy example. Consider a project structured like this:</p> <p>CMakeLists.txt <br> src/lib/source.cpp <br> src/lib/CMakeLists.txt <br> src/include/some_header.hpp # which is included in source.cpp <br> <br><br> Content of main CMakeLists.txt:</p> <pre><code>cmake_mimimum_required(VERSION 2.8.6) project("automoctest") add_subdirectory(src/lib) </code></pre> <p><br><br> Content of src/lib/CMakeLists.txt:</p> <pre><code>include_directories(${CMAKE_HOME_DIRECTORY}/src/include) find_package(Qt4 4.8 REQUIRED QtCore) include(UseQt4) include_directories(${CMAKE_CURRENT_BINARY_DIR}) add_library(foo SHARED source.cpp) target_link_libraries(foo ${QT_LIBRARIES}) set_target_properties(foo PROPERTIES AUTOMOC true) </code></pre> <p><br><br> Inside source.cpp the file some_header.hpp is included like this:</p> <pre><code>#include "some_header.hpp" </code></pre> <p><br><br> The Problem:<br> The file some_header.hpp includes a Q_OBJECT and has some signals, so moc needs to work its magic. But as the header is not inside the actual project the header will not get mocked. I don't even know the filename of some_header.hpp so I can't add it specifically to be mocked. Obviously AUTOMOC does not check the include_directories for mockable files even when a source file includes one of them.</p> <p>What I tried (unsuccessfully):</p> <ul> <li>use #include moc_some_header.cpp in source.cpp <br> as it is described in the cmake documentation. This leads to an error in which cmake complains that it could not find some_header{.h,.hpp,.hxx,.H}</li> <li>setting CMAKE_AUTOMOC_RELAXED_MODE to true. Even though it's not clear from the doc what this actually does. Made no difference anyway.</li> <li>setting AUTOMOC_MOC_OPTIONS to -Isrc/include or -I/path/to/project/src/include or -I${CMAKE_HOME_DIRECTORY}/src/include <br> Doesn't do anything that I could see.</li> </ul> <p>The great thing about AUTOMOC is that I don't need to know which files actually need to be mocked. In this case however I would need to know all the headers that might have a Q_OBJECT inside, that are included by my source files.</p> <p>Is there a way to tell AUTOMOC where exactly to look for mockable files?</p>
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