The option added in #174522 breaks simulator tests, since `set_default` overrides `False` values with the default. Since these options are either string or boolean, this patches set_default to override only un-set or empty string values (empty string is not truth-y and therefore would be overwritten by defaults currently, so this is NFCI)
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================