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If we're on a system that has ld.gold 2.35 or earlier, we want to use lld instead because otherwise we end up with duplicate sections in the output. rdar://123504095
19 lines
697 B
CMake
19 lines
697 B
CMake
# Find the version of ld.gold, if installed.
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#
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# Versions prior to 2.36 break Swift programs because they won't coalesce
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# sections with different SHF_GNU_RETAIN flags.
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function(get_gold_version result_var_name)
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find_program(gold_executable "ld.gold")
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if(gold_executable)
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execute_process(
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COMMAND "${gold_executable}" "--version"
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COMMAND "head" "-n" "1"
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COMMAND "sed" "-e" "s/^.* (\\([^)]*\\)).*$/\\1/g;s/.* \\([0-9][0-9]*\\(\\.[0-9][0-9]*\\)*\\).*/\\1/g"
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OUTPUT_VARIABLE gold_version
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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set("${result_var_name}" "${gold_version}" PARENT_SCOPE)
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else()
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set("${result_var_name}" "" PARENT_SCOPE)
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endif()
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endfunction()
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