I think I found a CMake bug where cache variables set on the command-line (CMAKE_INSTALL_PREFIX:PATH) are not set as expected when the cache is deleted by cmake because a variable like CMAKE_C_COMPILER:FILEPATH is set. I've reduced this down as much as I could. I'm demonstrating the bug using the ITK source tree, but I doubt that matters.
My workaround is to always remove the cache file before running cmake. ######################################################################## #### # make a build dir rm -rf $DEV/cmake_debug mkdir $DEV/cmake_debug cd $DEV/cmake_debug # system info % uname -a Linux tanaga 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux % /local/wheeler/dev/cmake-2.8.3/bin/cmake --version cmake version 2.8.3 ######################################################################## #### # Step 1 Remove the cache file and run CMake, setting CMAKE_INSTALL_PREFIX on the command-line. CMAKE_INSTALL_PREFIX gets set correctly. rm -f CMakeCache.txt /local/wheeler/dev/cmake-2.8.3/bin/cmake \ -G"Unix Makefiles" \ -DCMAKE_INSTALL_PREFIX:PATH=/local/wheeler/dev/itk_usr_gcc_rel \ -DCMAKE_C_COMPILER:FILEPATH=gcc \ /local/wheeler/dev/itk_src grep CMAKE_INSTALL_PREFIX:PATH CMakeCache.txt CMAKE_INSTALL_PREFIX:PATH=/local/wheeler/dev/itk_usr_gcc_rel ######################################################################## #### # Step 2 Do not remove the cache file, but re-run cmake, but without setting CMAKE_INSTALL_PREFIX:PATH or CMAKE_C_COMPILER:FILEPATH. No problem, the setting of CMAKE_INSTALL_PREFIX is preserved. # rm -f CMakeCache.txt /local/wheeler/dev/cmake-2.8.3/bin/cmake \ -G"Unix Makefiles" \ /local/wheeler/dev/itk_src grep CMAKE_INSTALL_PREFIX:PATH CMakeCache.txt CMAKE_INSTALL_PREFIX:PATH=/local/wheeler/dev/itk_usr_gcc_rel ######################################################################## #### # Step 3 Do not remove the cache file, but re-run cmake setting CMAKE_INSTALL_PREFIX:PATH and CMAKE_C_COMPILER:FILEPATH. CMAKE_INSTALL_PREFIX is no longer set the way I want it. # rm -f CMakeCache.txt /local/wheeler/dev/cmake-2.8.3/bin/cmake \ -G"Unix Makefiles" \ -DCMAKE_INSTALL_PREFIX:PATH=/local/wheeler/dev/itk_usr_gcc_rel \ -DCMAKE_C_COMPILER:FILEPATH=gcc \ /local/wheeler/dev/itk_src grep CMAKE_INSTALL_PREFIX:PATH CMakeCache.txt CMAKE_INSTALL_PREFIX:PATH=/usr/local ######################################################################## #### In Step 3 I get this warning from CMake. Should be no problem since CMAKE_INSTALL_PREFIX is explicitly set on the command line. You have changed variables that require your cache to be deleted. Configure will be re-run and you may have to reset some variables. The following variables have changed: CMAKE_C_COMPILER= gcc It seems that when CMake clears the cache because I set CMAKE_C_COMPILER:FILEPATH it reverts CMAKE_INSTALL_PREFIX:PATH to its default value and does not honor the -DCMAKE_INSTALL_PREFIX:PATH=... on the cmake command-line. Also note that I am not changing the value of CMAKE_C_COMPILER:FILEPATH. If this is not a bug, then I suggest the warning cmake issues (above) also explain that even variables settings made with the -D option may not be honored. ######################################################################## #### _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
