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include(LLVMParseArguments)
# Compile a source into an object file with COMPILER_RT_TEST_COMPILER using
# a provided compile flags and dependenices.
# clang_compile(<object> <source>
# CFLAGS <list of compile flags>
# DEPS <list of dependencies>)
macro(clang_compile object_file source)
parse_arguments(SOURCE "CFLAGS;DEPS" "" ${ARGN})
get_filename_component(source_rpath ${source} REALPATH)
if(NOT COMPILER_RT_STANDALONE_BUILD)
list(APPEND SOURCE_DEPS clang)
endif()
string(REGEX MATCH "[.](cc|cpp)$" is_cxx ${source_rpath})
if(is_cxx)
string(REPLACE " " ";" global_flags "${CMAKE_CXX_FLAGS}")
else()
string(REPLACE " " ";" global_flags "${CMAKE_C_FLAGS}")
endif()
# On Windows, CMAKE_*_FLAGS are built for MSVC but we use the GCC clang.exe
# which doesn't support flags starting with "/smth". Replace those with
# "-smth" equivalents.
if(MSVC)
string(REGEX REPLACE "^/" "-" global_flags "${global_flags}")
string(REPLACE ";/" ";-" global_flags "${global_flags}")
endif()
# Ignore unknown warnings. CMAKE_CXX_FLAGS may contain GCC-specific options
# which are not supported by Clang.
list(APPEND global_flags -Wno-unknown-warning-option)
set(compile_flags ${global_flags} ${SOURCE_CFLAGS})
add_custom_command(
OUTPUT ${object_file}
COMMAND ${COMPILER_RT_TEST_COMPILER} ${compile_flags} -c
-o "${object_file}"
${source_rpath}
MAIN_DEPENDENCY ${source}
DEPENDS ${SOURCE_DEPS})
endmacro()
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