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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">It seems CMake has a special handling for system header dependencies. I.e. if my .c file includes /usr/include/someheader.h, modifying the someheader.h does not cause the .c file to be rebuilt.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">How to work around this issue? We have some custom libraries that get installed to system paths and they change relatively often. It is error-prone for the developers to accidentally keep using the library with old header
compiled in.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Things I have tried this far:<br>
* add_dependencies(target /path/to/header.h) </span><span lang="EN-US" style="font-family:Wingdings">à</span><span lang="EN-US"> no luck<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">* add_library(include_deplib /path/to/header.h) + target_link_libraries(target include_deplib)
</span><span lang="EN-US" style="font-family:Wingdings">à</span><span lang="EN-US"> needs additional tweaking to be legal, still does not work<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">* OBJECT_DEPENDS property pointing to the .h file</span><span lang="EN-US" style="font-family:Wingdings">à</span><span lang="EN-US"> This works but I need to do this for each c. file separately<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I wonder if this should be this difficult, I am probably missing something? Can I just somehow enable tracking system headers also as expected-to-change dependencies?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Lassi<o:p></o:p></span></p>
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