I have two projects: A and B. A depends on B but should set some settings for the proper compilation of B when included in A.
==== CMakeLists.txt ==== (project A) set(PROJB_OPENCV_LINK NO) add_subdirectory(vendor/projb) ==== vendor/projb/CMakeLists.txt === (project B) option (PROJB_OPENCV_LINK "Set this to NO to link opencv alloc later." YES) ======== The local value "PROJB_OPENCV_LINK" is overwritten by the option on the first run. If you run cmake a second time, the cached value is seen and takes over so the option does not overwrite. I do not see any reason why an "option" setting should overwrite a defined variable. build > cmake .. ==> fail build > cmake .. || cmake .. ==> works. This is absurd. Gaspard PS: I know there is a workaround by using IF(DEFINED...).
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