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#
# Copyright (c) 2018-2024, Intel Corporation
#
# SPDX-License-Identifier: BSD-3-Clause
#
# ispc FindLLVM.cmake
#
if (NOT LLVM_CONFIG_EXECUTABLE)
find_program(LLVM_CONFIG_EXECUTABLE NAMES llvm-config)
if (NOT LLVM_CONFIG_EXECUTABLE)
message(FATAL_ERROR "Failed to find llvm-config")
endif()
endif()
message(STATUS "LLVM_CONFIG_EXECUTABLE: ${LLVM_CONFIG_EXECUTABLE}")
# It is better to use cmake_path here if we are OK to raise CMake version up to 3.20.
# cmake_path(GET LLVM_CONFIG_EXECUTABLE PARENT_PATH LLVM_TOOLS_BINARY_DIR)
get_filename_component(LLVM_TOOLS_BINARY_DIR "${LLVM_CONFIG_EXECUTABLE}" DIRECTORY)
message(STATUS "LLVM_TOOLS_BINARY_DIR: ${LLVM_TOOLS_BINARY_DIR}")
if (NOT LLVM_DIR)
# It is better to use cmake_path here if we are OK to raise CMake version up to 3.20.
# cmake_path(SET LLVM_DIR NORMALIZE "${LLVM_TOOLS_BINARY_DIR}/../lib/cmake/llvm")
set(LLVM_DIR "${LLVM_TOOLS_BINARY_DIR}/../lib/cmake/llvm")
endif()
message(STATUS "LLVM_DIR is ${LLVM_DIR}")
find_program(CLANG_EXECUTABLE NAMES clang
PATHS ${LLVM_TOOLS_BINARY_DIR} PATH_SUFFIXES bin NO_DEFAULT_PATH)
if (NOT CLANG_EXECUTABLE)
message(FATAL_ERROR "Failed to find clang" )
endif()
message(STATUS "CLANG_EXECUTABLE: ${CLANG_EXECUTABLE}")
find_program(CLANGPP_EXECUTABLE NAMES clang++
PATHS ${LLVM_TOOLS_BINARY_DIR} PATH_SUFFIXES bin NO_DEFAULT_PATH)
if (NOT CLANGPP_EXECUTABLE)
message(FATAL_ERROR "Failed to find clang++" )
endif()
message(STATUS "CLANGPP_EXECUTABLE: ${CLANGPP_EXECUTABLE}")
find_program(LLVM_AS_EXECUTABLE NAMES llvm-as
PATHS ${LLVM_TOOLS_BINARY_DIR} PATH_SUFFIXES bin NO_DEFAULT_PATH)
if (NOT LLVM_AS_EXECUTABLE)
message(FATAL_ERROR "Failed to find llvm-as" )
endif()
message(STATUS "LLVM_AS_EXECUTABLE: ${LLVM_AS_EXECUTABLE}")
if (ISPC_INCLUDE_TESTS)
find_program(FILE_CHECK_EXECUTABLE NAMES FileCheck
PATHS ${LLVM_TOOLS_BINARY_DIR} PATH_SUFFIXES bin NO_DEFAULT_PATH)
if (NOT FILE_CHECK_EXECUTABLE)
message(FATAL_ERROR "Failed to find FileCheck" )
endif()
message(STATUS "FILE_CHECK_EXECUTABLE: ${FILE_CHECK_EXECUTABLE}")
endif()
function(str_to_list inStr outStr)
string(REPLACE " " ";" tmpOutput "${inStr}")
set(${outStr} ${tmpOutput} PARENT_SCOPE)
endfunction()
function(run_llvm_config output_var)
set(command "${LLVM_CONFIG_EXECUTABLE}" ${ARGN})
execute_process(COMMAND ${command}
RESULT_VARIABLE exit_code
OUTPUT_VARIABLE ${output_var}
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_STRIP_TRAILING_WHITESPACE
)
if (NOT ("${exit_code}" EQUAL "0"))
message(FATAL_ERROR "Failed running ${command}")
endif()
set(${output_var} ${${output_var}} PARENT_SCOPE)
endfunction()
run_llvm_config(LLVM_VERSION_NUMBER "--version")
message(STATUS "Detected LLVM version: ${LLVM_VERSION_NUMBER}")
run_llvm_config(ASSERTIONS "--assertion-mode")
run_llvm_config(CXX_FLAGS "--cxxflags")
# Check DNDEBUG flag
if (NOT CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
string(FIND CXX_FLAGS "NDEBUG" NDEBUG_DEF)
# If LLVM was built without NDEBUG flag remove it from Cmake flags
if (NOT ${NDEBUG_DEF} GREATER -1)
foreach (cmake_flags_to_update
CMAKE_CXX_FLAGS_RELEASE
CMAKE_C_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL
CMAKE_C_FLAGS_MINSIZEREL
CMAKE_CXX_FLAGS_RELWITHDEBINFO
CMAKE_C_FLAGS_RELWITHDEBINFO)
string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " " "${cmake_flags_to_update}" "${${cmake_flags_to_update}}")
endforeach()
endif()
endif()
run_llvm_config(LLVM_LIBRARY_DIRS "--libdir")
run_llvm_config(LLVM_INCLUDE_DIRS "--includedir")
function(get_llvm_libfiles resultList)
run_llvm_config(LLVM_LIBS "--libfiles" ${ARGN})
str_to_list("${LLVM_LIBS}" tmpList)
set(${resultList} ${tmpList} PARENT_SCOPE)
endfunction()
function(get_llvm_cppflags resultList)
run_llvm_config(CPP_FLAGS "--cppflags")
str_to_list("${CPP_FLAGS}" tmpList)
set(${resultList} ${tmpList} PARENT_SCOPE)
endfunction()
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