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Since commit e015df7d (...delete CMakeFiles directory when cache is deleted, 2006-02-20) we deleted the files in the CMakeFiles directory when deleting CMakeCache.txt in order to reset the build tree to a fresh state. This allowed commit fd33bf93 (fix for bug 6102, allow users to change the compiler, 2007-12-13) to delete CMakeCache.txt when the user changes the compiler and CMakeFiles/CMake<lang>Compiler.cmake and other platform information files would go with it to allow a fresh start. Then commit 7195aca5 (Make platform information files specific to the CMake version, 2012-08-24) moved the platform information files to a subdirectory e.g. CMakeFiles/<version>/CMake<lang>Compiler.cmake where <version> is the current CMake version. This causes the compiler change logic to fail to remove all old compiler information. Then on the next configuration CMake<lang>Compiler.cmake would set CMAKE_<lang>_COMPILER back to the old value and re-trigger the compiler change logic. This causes an infinite loop of cache deletion and compiler reset. Fix this simply by teaching cmCacheManager::DeleteCache to remove the entire CMakeFiles directory recursively whenever it removes an existing CMakeCache.txt. This fully resets the build tree to configure with a fresh compiler.
This is CMake, the cross-platform, open-source make system. CMake is distributed under the BSD License, see Copyright.txt. For documentation see the Docs/ directory once you have built CMake or visit http://www.cmake.org. Building CMake ============== Supported Platforms ------------------- MS Windows, Mac OS X, Linux, FreeBSD, Solaris, HP-UX, IRIX, BeOS, QNX Other UNIX-like operating systems may work too out of the box, if not it shouldn't be a major problem to port CMake to this platform. Contact the CMake mailing list in this case: http://www.cmake.org/mailman/listinfo/cmake If you don't have any previous version of CMake already installed -------------------------------------------------------------- * UNIX/Mac OSX/MinGW/MSYS/Cygwin: You need to have a compiler and a make installed. Run the bootstrap script you find the in the source directory of CMake. You can use the --help option to see the supported options. You may want to use the --prefix=<install_prefix> option to specify a custom installation directory for CMake. You can run the bootstrap script from within the CMake source directory or any other build directory of your choice. Once this has finished successfully, run make and make install. So basically it's the same as you may be used to from autotools-based projects: $ ./bootstrap; make; make install * Other Windows: You need to download and install a binary release of CMake in order to build CMake. You can get these releases from http://www.cmake.org/HTML/Download.html . Then proceed with the instructions below. You already have a version of CMake installed --------------------------------------------- You can build CMake as any other project with a CMake-based build system: run the installed CMake on the sources of this CMake with your preferred options and generators. Then build it and install it. For instructions how to do this, see http://www.cmake.org/HTML/RunningCMake.html