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Prefer using LLVM_PREFIX if available to find clang and llvm-link programs #298

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merged 1 commit into from Sep 20, 2018
Merged

Prefer using LLVM_PREFIX if available to find clang and llvm-link programs #298

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37 changes: 28 additions & 9 deletions cmake/BCCompiler.cmake
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Expand Up @@ -28,21 +28,40 @@ if(DEFINED ENV{LLVM_INSTALL_PREFIX})
set(LLVM_INSTALL_PREFIX $ENV{LLVM_INSTALL_PREFIX})
endif()

if("${CMAKE_CXX_COMPILER}" STREQUAL "${CLANG_CXX_EXECUTABLE_NAME}")
set(CLANG_PATH "${CMAKE_CXX_COMPILER}")

else()
if (DEFINED LLVM_INSTALL_PREFIX)
message(STATUS "LLVM bin dir: ${LLVM_INSTALL_PREFIX}/bin")
# clang path
find_program(CLANG_PATH
NAMES "${CLANG_CXX_EXECUTABLE_NAME}"
HINTS "${LLVM_INSTALL_PREFIX}/bin"
NO_DEFAULT_PATH
)

# llvm-link path
find_program(LLVMLINK_PATH
NAMES "${LLVMLINK_EXECUTABLE_NAME}"
HINTS "${LLVM_INSTALL_PREFIX}/bin"
NO_DEFAULT_PATH
)
else()
# clang path
if("${CMAKE_CXX_COMPILER}" STREQUAL "${CLANG_CXX_EXECUTABLE_NAME}")
set(CLANG_PATH "${CMAKE_CXX_COMPILER}")

else()
find_program(CLANG_PATH
NAMES "${CLANG_CXX_EXECUTABLE_NAME}"
PATHS "/usr/bin" "/usr/local/bin" "${LLVM_INSTALL_PREFIX}/bin" "${LLVM_TOOLS_BINARY_DIR}" "C:/Program Files/LLVM/bin" "C:/Program Files (x86)/LLVM/bin"
)
endif()

# llvm-link path
find_program(LLVMLINK_PATH
NAMES "${LLVMLINK_EXECUTABLE_NAME}"
PATHS "/usr/bin" "/usr/local/bin" "${LLVM_INSTALL_PREFIX}/bin" "${LLVM_TOOLS_BINARY_DIR}" "C:/Program Files/LLVM/bin" "C:/Program Files (x86)/LLVM/bin"
)
endif()

find_program(LLVMLINK_PATH
NAMES "${LLVMLINK_EXECUTABLE_NAME}"
PATHS "/usr/bin" "/usr/local/bin" "${LLVM_INSTALL_PREFIX}/bin" "${LLVM_TOOLS_BINARY_DIR}" "C:/Program Files/LLVM/bin" "C:/Program Files (x86)/LLVM/bin"
)

if((NOT "${CLANG_PATH}" MATCHES "CLANG_PATH-NOTFOUND") AND (NOT "${LLVMLINK_PATH}" MATCHES "LLVMLINK_PATH-NOTFOUND"))
file(WRITE "${CMAKE_BINARY_DIR}/emitllvm.test.cpp" "int main(int argc, char* argv[]){return 0;}\n\n")

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