diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/CMakeLists.txt | 25 | ||||
| -rw-r--r-- | llvm/docs/CMake.rst | 8 |
2 files changed, 33 insertions, 0 deletions
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt index 7a70ebcf4b4..9fcb30a5b20 100644 --- a/llvm/CMakeLists.txt +++ b/llvm/CMakeLists.txt @@ -93,6 +93,31 @@ if(CMAKE_HOST_APPLE AND APPLE) endif() endif() +# Side-by-side subprojects layout: automatically set the +# LLVM_EXTERNAL_${project}_SOURCE_DIR using LLVM_ALL_PROJECTS +# This allows an easy way of setting up a build directory for llvm and another +# one for llvm+clang+... using the same sources. +set(LLVM_ALL_PROJECTS "clang;libcxx;libcxxabi;lldb;compiler-rt;lld;polly") +set(LLVM_ENABLE_PROJECTS "" CACHE STRING + "Semicolon-separated list of projects to build (${LLVM_ALL_PROJECTS}), or \"all\".") +if( LLVM_ENABLE_PROJECTS STREQUAL "all" ) + set( LLVM_ENABLE_PROJECTS ${LLVM_ALL_PROJECTS}) +endif() +foreach(proj ${LLVM_ENABLE_PROJECTS}) + set(PROJ_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}") + if(NOT EXISTS "${PROJ_DIR}" OR NOT IS_DIRECTORY "${PROJ_DIR}") + message(FATAL_ERROR "LLVM_ENABLE_PROJECTS requests ${proj} but directory not found: ${PROJ_DIR}") + endif() + string(TOUPPER "${proj}" upper_proj) + set(LLVM_EXTERNAL_${upper_proj}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}") + # There is a widely spread opinion that clang-tools-extra should be merged + # into clang. The following simulates it by always enabling clang-tools-extra + # when enabling clang. + if (proj STREQUAL "clang") + set(LLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../clang-tools-extra") + endif() +endforeach() + # The following only works with the Ninja generator in CMake >= 3.0. set(LLVM_PARALLEL_COMPILE_JOBS "" CACHE STRING "Define the maximum number of concurrent compilation jobs.") diff --git a/llvm/docs/CMake.rst b/llvm/docs/CMake.rst index 7dc475be70b..b8a5b3112ed 100644 --- a/llvm/docs/CMake.rst +++ b/llvm/docs/CMake.rst @@ -336,6 +336,14 @@ LLVM-specific variables will not be used. If the variable for an external project does not point to a valid path, then that project will not be built. +**LLVM_ENABLE_PROJECTS**:STRING + Semicolon-separated list of projects to build, or *all* for building all + (clang, libcxx, libcxxabi, lldb, compiler-rt, lld, polly) projects. + This flag assumes that projects are checked out side-by-side and not nested, + i.e. clang needs to be in parallel of llvm instead of nested in `llvm/tools`. + This feature allows to have one build for only LLVM and another for clang+llvm + using the same source checkout. + **LLVM_EXTERNAL_PROJECTS**:STRING Semicolon-separated list of additional external projects to build as part of llvm. For each project LLVM_EXTERNAL_<NAME>_SOURCE_DIR have to be specified |
