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[cmake] Allow testing against installed LLVM with no sources

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Adjust the stand-alone build files to accept either CMake files from
LLVM_CMAKE_PATH or from LLVM_MAIN_SRC_DIR instead of requiring both.
This makes it possible to run libcxx tests on top of installed LLVM
and lit, without having to unpack a copy of LLVM sources. Furthermore,
it avoids adding duplicate paths.

Differential Revision: https://reviews.llvm.org/D25093

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@284583 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michal Gorny 2016-10-19 12:34:17 +00:00
parent 7c2afba80b
commit 4f031f899c
1 changed files with 6 additions and 11 deletions
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17
cmake/Modules/HandleOutOfTreeLLVM.cmake
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@ -43,21 +43,16 @@ macro(find_llvm_parts)
return()
endif()
if (NOT EXISTS ${LLVM_MAIN_SRC_DIR})
if (EXISTS "${LLVM_CMAKE_PATH}")
list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
elseif (EXISTS "${LLVM_MAIN_SRC_DIR}/cmake/modules")
list(APPEND CMAKE_MODULE_PATH "${LLVM_MAIN_SRC_DIR}/cmake/modules")
else()
set(LLVM_FOUND OFF)
message(WARNING "Not found: ${LLVM_MAIN_SRC_DIR}")
message(WARNING "Neither ${LLVM_CMAKE_PATH} nor ${LLVM_MAIN_SRC_DIR}/cmake/modules found")
return()
endif()
if(NOT EXISTS ${LLVM_CMAKE_PATH})
set(LLVM_FOUND OFF)
message(WARNING "Not found: ${LLVM_CMAKE_PATH}")
return()
endif()
list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
list(APPEND CMAKE_MODULE_PATH "${LLVM_MAIN_SRC_DIR}/cmake/modules")
set(LLVM_FOUND ON)
endmacro(find_llvm_parts)