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2018-01-14execinfo: Clean up, implement backtrace_symbols_fdSamuel Holland1-0/+97
Rename the file to match the header it implements functions from. Changes to existing code: * Fix the return value from backtrace (off by one). * Use __builtin_extract_return_addr as recommended in gcc documentation. * Document header usage. * Document where the functions are referenced in the LSB standard. Signed-off-by: Samuel Holland <samuel@sholland.org>