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[cmake] Don't build Native llvm-config when cross compiling if passed by user.

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Summary:
Rename LLVM_CONFIG_EXE to LLVM_CONFIG_PATH, and avoid building it if
passed in by user.  This is the same way CLANG_TABLEGEN and
LLVM_TABLEGEN are handled, e.g., when -DLLVM_OPTIMIZED_TABLEGEN=ON is
passed.

Differential Revision: https://reviews.llvm.org/D41806

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323053 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Don Hinton 2018-01-21 00:29:00 +00:00
parent 2d05f76ffa
commit 18789ab5c4
2 changed files with 8 additions and 9 deletions
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2
cmake/modules/LLVMExternalProjectUtils.cmake
View File

@ -141,7 +141,7 @@ function(llvm_ExternalProject_Add name source_dir)
-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
-DCMAKE_AR=${CMAKE_AR}
-DCMAKE_RANLIB=${CMAKE_RANLIB})
set(llvm_config_path "${LLVM_NATIVE_BUILD}/bin/llvm-config")
set(llvm_config_path ${LLVM_CONFIG_PATH})
else()
set(llvm_config_path "$<TARGET_FILE:llvm-config>")
endif()

15
tools/llvm-config/CMakeLists.txt
View File

@ -64,18 +64,17 @@ endif()
# Add the dependency on the generation step.
add_file_dependencies(${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp ${BUILDVARIABLES_OBJPATH})
if(CMAKE_CROSSCOMPILING)
set(${project}_LLVM_CONFIG_EXE "${LLVM_NATIVE_BUILD}/bin/llvm-config")
set(${project}_LLVM_CONFIG_EXE ${${project}_LLVM_CONFIG_EXE} PARENT_SCOPE)
if(CMAKE_CROSSCOMPILING AND NOT LLVM_CONFIG_PATH)
set(LLVM_CONFIG_PATH "${LLVM_NATIVE_BUILD}/bin/llvm-config" CACHE STRING "")
add_custom_command(OUTPUT "${${project}_LLVM_CONFIG_EXE}"
add_custom_command(OUTPUT "${LLVM_CONFIG_PATH}"
COMMAND ${CMAKE_COMMAND} --build . --target llvm-config --config $<CONFIGURATION>
DEPENDS ${LLVM_NATIVE_BUILD}/CMakeCache.txt
WORKING_DIRECTORY ${LLVM_NATIVE_BUILD}
COMMENT "Building native llvm-config..."
USES_TERMINAL)
add_custom_target(${project}NativeLLVMConfig DEPENDS ${${project}_LLVM_CONFIG_EXE})
add_dependencies(${project}NativeLLVMConfig CONFIGURE_LLVM_NATIVE)
add_custom_target(NativeLLVMConfig DEPENDS ${LLVM_CONFIG_PATH})
add_dependencies(NativeLLVMConfig CONFIGURE_LLVM_NATIVE)
add_dependencies(llvm-config ${project}NativeLLVMConfig)
endif(CMAKE_CROSSCOMPILING)
add_dependencies(llvm-config NativeLLVMConfig)
endif()