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include(CheckCXXCompilerFlag)
# Adds CXX compiler flag if the flag is supported by the compiler.
#
# This is effectively a combination of CMake's check_cxx_compiler_flag()
# and add_compile_options():
#
# if(check_cxx_compiler_flag(flag))
# add_compile_options(flag)
#
function(eth_add_cxx_compiler_flag_if_supported FLAG)
# Remove leading - or / from the flag name.
string(REGEX REPLACE "^-|/" "" name ${FLAG})
check_cxx_compiler_flag(${FLAG} ${name})
if(${name})
add_compile_options(${FLAG})
endif()
# If the optional argument passed, store the result there.
if(ARGV1)
set(${ARGV1} ${name} PARENT_SCOPE)
endif()
endfunction()
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