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WIP: Add CMake flag for OpenMP support #43

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WIP: Add CMake flag for OpenMP support #43

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31 changes: 28 additions & 3 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -51,9 +51,23 @@ if(USE_SYSTEM_LLVM)
set(castxml_deps)
else()


set(llvm_version 11.1.0)
set(llvm_folder 11.1.0)
set(llvm_md5 69bc06661ce8f1872e27b40ff96002b2)

option(LLVM_OPENMP_SUPPORT "Add the flag to enable OpenMP support for LLVM?" OFF)
if(LLVM_OPENMP_SUPPORT)
set(openmp_version ${llvm_version})
set(openmp_folder ${llvm_folder})
set(openmp_args
-DLLVM_EXTERNAL_OPENMP_SOURCE_DIR:PATH=${CMAKE_CURRENT_BINARY_DIR}/openmp-${openmp_version}.src
-DLLVM_EXTERNAL_CLANG_SOURCE_DIR:PATH=${CMAKE_CURRENT_BINARY_DIR}/clang-${llvm_version}.src
-DLLVM_TOOL_OPENMP_BUILD:BOOL=ON)
set(omp_src "openmp.tar.xz")
file(DOWNLOAD https://github.com/llvm/llvm-project/releases/download/llvmorg-${openmp_folder}/openmp-${openmp_version}.src.tar.xz ${CMAKE_CURRENT_BINARY_DIR}/${omp_src} LOG omp_result)
endif()

ExternalProject_Add(llvm
URL https://github.com/llvm/llvm-project/releases/download/llvmorg-${llvm_folder}/llvm-${llvm_version}.src.tar.xz
URL_MD5 ${llvm_md5}
Expand All @@ -74,19 +88,30 @@ else()
-DLLVM_INCLUDE_EXAMPLES:BOOL=OFF
-DLLVM_INCLUDE_DOCS:BOOL=OFF
-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN:BOOL=ON
${openmp_args}
${osx_args}
${verbose_command}
LOG_BUILD 0
INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/llvm
)

if(LLVM_OPENMP_SUPPORT)
ExternalProject_Add_Step(llvm openmp
COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_CURRENT_BINARY_DIR}/${omp_src}
DEPENDERS configure
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
endif()

# Execution of download and unzip of clang moved here to
# allow OpenMP to properly find Clang source code during LLVM compilation
file(DOWNLOAD https://github.com/llvm/llvm-project/releases/download/llvmorg-${llvm_folder}/clang-${llvm_version}.src.tar.xz ${CMAKE_CURRENT_BINARY_DIR}/cfe-${llvm_version}.tar.xz STATUS clang_result)
execute_process(COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_CURRENT_BINARY_DIR}/cfe-${llvm_version}.tar.xz WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})

set(clang_md5 133c6719e22bfded74fcaf1d3092e979)
ExternalProject_Add(clang
URL https://github.com/llvm/llvm-project/releases/download/llvmorg-${llvm_folder}/clang-${llvm_version}.src.tar.xz
URL_MD5 ${clang_md5}
DEPENDS llvm
SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/cfe-${llvm_version}
SOURCE_DIR ${CMAKE_CURRENT_BINARY_DIR}/clang-${llvm_version}.src
CMAKE_ARGS -Wno-dev
CMAKE_GENERATOR "${CMAKE_GENERATOR}"
CMAKE_CACHE_ARGS
Expand Down