On Linux (Debian Testing) with CMake 3.13.2 (which I built myself) I have a case where apparently
target_link_libraries(.... /usr/lib/x86_64-linux-gnu/libm.so) results in an actual link option "-lm". Is this an exception to the rule documented at <https://cmake.org/cmake/help/v3.13/policy/CMP0060.html#policy:CMP0060> that if the full path is specified to target_link_libraries (as above) that full path is used for the actual linking? If so, I am curious about why this "CMake -lm exception" occurs and are there other instances of such exceptions? And shouldn't at least the fact that there are still some exceptions be documented as part of the CMP0060 documentation? Note I discovered the above issue from a fairly short chain of inference for the libLASi CMake-based build system, but if necessary, I would be willing to attempt making a simple case demonstrating this issue if it turns out that nobody here can verify it. By the way, my use case is that some day I would likely to have the option of building libLASi as static with *all* external libraries static as well. Of course, for that use case I could not use a generic linking flag such as -lm which is why I am wondering why "-lm" is being used for the actual link option above. Alan __________________________ Alan W. Irwin Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); the Time Ephemerides project (timeephem.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake-developers
