On 2017-04-22 21:46-0700 Alan W. Irwin wrote:
So my next steps are gross simplification (to prove this cross-contamination of build rules for UseSWIG-generated modules in the same CMakeLists.txt file really is due to a regression in CMake somewhere between CMake-3.0.2 and 3.7.2. Note that both CMake-3.7.2 and CMake-3.8.0-rc4 show the warning problem.)
Well, the short story is there was no such regression. Note the "--SOLVED" in the revised subject line. Also, sorry for the noise! The somewhat longer story is just at the start (fortunately for me) of that simplification process, I double checked the source of both FindSWIG.cmake and UseSWIG.cmake as used by PLplot, and those turned out to be special cutting-edge versions recommended by one user of the cmake bug tracking system from a decade (!) ago. Oops! Those versions did continue to work for a very long time for our simple swig needs, but those are obviously well past their "best buy" date, and complete removal of those "special" versions from PLplot (so PLplot is now using the official version of those modules that is distributed by whatever CMake version a user chooses) works without the warning messages for both CMake-3.0.2 AND CMake-3.8.0-rc4. In fact (as I expected since I am an optimist) but unlike the extremely peculiar result I had before, inspection of bindings/python/CMakeFiles/_Pltk_init.dir/build.make showed no contamination from plplotc rules at all. So problem solved completely! Thus, thanks to swig, and official versions of FindSWIG.cmake and UseSWIG.cmake that vary with CMake version but which are good enough for our needs despite that variation, I now have my test of our Tcl/Tk "plframe" plotting GUI working well for both Python 2 and Python 3 for a very large range of CMake versions. I hasten to add we will not support that large a range of CMake versions too much longer although that supported range actually helped to figure out the current problem. Indeed, I soon plan to bump our minimum CMake version from 3.0.2 to 3.6.2 which will allow me to greatly simplify our build system by stripping out a whole lot of cruft that was necessary to work around issues that existed for quite a few versions after CMake-3.0.2 was released. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). 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.sf.net); 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: http://public.kitware.com/mailman/listinfo/cmake-developers
