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[CMake] Unbreak add_llvm_external_project when external projects are specified.

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LLVM_EXTERNAL_*_SOURCE_DIR is reset as PATH with set(CACHE PATH).
Then the CACHE PATH variable, LLVM_EXTERNAL_*_SOURCE_DIR, is normalized as
${CMAKE_SOURCE_DIR}/${path_var} if ${path_var} is relative.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242120 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
NAKAMURA Takumi 2015-07-14 05:12:53 +00:00
parent 9743de8916
commit b1e51dae69
1 changed files with 3 additions and 0 deletions
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3
cmake/modules/AddLLVM.cmake
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@ -696,6 +696,9 @@ macro(add_llvm_external_project name)
endif()
if(NOT LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR)
set(LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/${add_llvm_external_dir}")
else()
set(LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR
CACHE PATH "Path to ${name} source directory")
endif()
if (EXISTS ${LLVM_EXTERNAL_${nameUPPER}_SOURCE_DIR}/CMakeLists.txt)
option(LLVM_EXTERNAL_${nameUPPER}_BUILD