diff options
| author | Mehdi Amini <mehdi.amini@apple.com> | 2016-11-07 22:13:38 +0000 |
|---|---|---|
| committer | Mehdi Amini <mehdi.amini@apple.com> | 2016-11-07 22:13:38 +0000 |
| commit | 1eed06a3795d01a843d9ec0bc81f436da8d03779 (patch) | |
| tree | 9280c4d160b036e054c6cad9e1f8c5915095dbe0 | |
| parent | c1f152d8d1e778be594b3ebe7eeac3428c030fd4 (diff) | |
| download | bcm5719-llvm-1eed06a3795d01a843d9ec0bc81f436da8d03779.tar.gz bcm5719-llvm-1eed06a3795d01a843d9ec0bc81f436da8d03779.zip | |
Add experimental support for unofficial monorepo-like directory layout
Summary:
This allows to have clang and llvm and the other subprojects
side-by-side instead of nested. This can be used with the monorepo or
multiple repos.
It will help having a single set of sources checked out but allows to
have a build directory with llvm and another one with llvm+clang.
Basically it abstracts LLVM_EXTERNAL_xxxx_SOURCE_DIR making it more
convenient by adopting a convention.
Reviewers: bogner, beanz, jlebar
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D26365
llvm-svn: 286162
| -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 |
