The following issue has been SUBMITTED. ====================================================================== http://public.kitware.com/Bug/view.php?id=15678 ====================================================================== Reported By: Chris Assigned To: ====================================================================== Project: CMake Issue ID: 15678 Category: CMake Reproducibility: always Severity: minor Priority: normal Status: new ====================================================================== Date Submitted: 2015-08-03 17:08 EDT Last Modified: 2015-08-03 17:08 EDT ====================================================================== Summary: CMakeCache.txt can't be passed into cmake's -C flag Description: I'm probably trying to be too clever, but I'm trying to setup a cmake build target for clang to do a "bootstrap" build where you build clang, then use the built clang to rebuild clang. I had this "genius" idea that I could try and pass through the CMake options used to configure the first clang using the CMakeCache.txt and the -C flag. It unfortunately doesn't work. I see the following errors:
[2/5] Performing configure step for 'bootstrap' FAILED: cd /Users/cbieneman/dev/open-source/llvm-build-rel/tools/clang/bootstrap/src/bootstrap-build && /Users/cbieneman/dev/open-source/cmake-bins/bin/cmake -C /Users/cbieneman/dev/open-source/llvm-build-rel/CMakeCache.txt -DCMAKE_CXX_COMPILER=/Users/cbieneman/dev/open-source/llvm-build-rel/bin/clang++ -DCMAKE_CXX_COMPILER=/Users/cbieneman/dev/open-source/llvm-build-rel/bin/clang "-GSublime Text 2 - Ninja" /Users/cbieneman/dev/open-source/llvm && /Users/cbieneman/dev/open-source/cmake-bins/bin/cmake -E touch /Users/cbieneman/dev/open-source/llvm-build-rel/tools/clang/bootstrap/src/bootstrap-stamp/bootstrap-configure loading initial cache file /Users/cbieneman/dev/open-source/llvm-build-rel/CMakeCache.txt CMake Error: Error in cmake code at /Users/cbieneman/dev/open-source/llvm-build-rel/CMakeCache.txt:17: Parse error. Expected a command name, got unquoted argument with text "//Default". CMake Error: Error processing file: /Users/cbieneman/dev/open-source/llvm-build-rel/CMakeCache.txt Steps to Reproduce: Apply the diffs below to clang, and configure with CMake setting -DCLANG_ENABLE_BOOTSTRAP=On, and run <buildtool> bootstrap. Additional Information: diff --git a/CMakeLists.txt b/CMakeLists.txt index ab70f1d..6974b6e 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -96,6 +96,7 @@ if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR ) option(LLVM_FORCE_USE_OLD_HOST_TOOLCHAIN "Set to ON to force using an old, unsupported host toolchain." OFF) + option(CLANG_ENABLE_BOOTSTRAP "Generate the clang bootstrap target" OFF) include(AddLLVM) include(TableGen) @@ -551,3 +552,31 @@ if (CLANG_BUILT_STANDALONE) ${CLANG_BINARY_DIR}/share/clang/cmake/ClangConfig.cmake COPYONLY) endif () + +if (CLANG_ENABLE_BOOTSTRAP) + include(ExternalProject) + + ExternalProject_Add(bootstrap + DEPENDS clang + PREFIX bootstrap + SOURCE_DIR ${CMAKE_SOURCE_DIR} + CMAKE_ARGS -C ${CMAKE_BINARY_DIR}/CMakeCache.txt + ${CLANG_BOOTSTRAP_CMAKE_ARGS} + -DCMAKE_CXX_COMPILER=${CMAKE_BINARY_DIR}/bin/clang++ + -DCMAKE_CXX_COMPILER=${CMAKE_BINARY_DIR}/bin/clang + STEP_TARGETS configure build + ) + + ExternalProject_Add_Step(bootstrap force-reconfigure + DEPENDERS configure + ALWAYS 1 + ) + + ExternalProject_Add_Step(bootstrap clobber + COMMAND ${CMAKE_COMMAND} -E remove_directory <BINARY_DIR> + COMMAND ${CMAKE_COMMAND} -E make_directory <BINARY_DIR> + COMMENT "Clobberring compiler-rt build directory..." + DEPENDERS configure + DEPENDS ${LLVM_RUNTIME_OUTPUT_INTDIR}/bootstrap + ) +endif() ====================================================================== Issue History Date Modified Username Field Change ====================================================================== 2015-08-03 17:08 Chris New Issue ====================================================================== -- 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