GoldVersion.cmake

# Find the version of ld.gold, if installed.
#
# Versions prior to 2.36 break Swift programs because they won't coalesce
# sections with different SHF_GNU_RETAIN flags.
function(get_gold_version result_var_name)
 find_program(gold_executable "ld.gold")
 if(gold_executable)
 execute_process(
COMMAND"${gold_executable}""--version"
COMMAND"head""-n""1"
COMMAND"sed""-e""s/^.* (\\([^)]*\\)).*$/\\1/g;s/.* \\([0-9][0-9]*\\(\\.[0-9][0-9]*\\)*\\).*/\\1/g"
OUTPUT_VARIABLE gold_version
 OUTPUT_STRIP_TRAILING_WHITESPACE)
 set("${result_var_name}""${gold_version}" PARENT_SCOPE)
 else()
 set("${result_var_name}""" PARENT_SCOPE)
 endif()
endfunction()