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3c637c1eec
The gcc target libraries (e.g. libstdc++) are currently built without any optimisation flag when `CT_CC_GCC_ENABLE_TARGET_OPTSPACE` is not enabled and default to `-O0` unless user explicitly specifies an optimisation flag. This commit updates the gcc build script to assume `-O2` for building target libraries unless user provides a different optimisation flag. Note also that this is the default behaviour for gcc when C[XX]FLAGS_FOR_TARGET is not overridden. Signed-off-by: Stephanos Ioannidis <root@stephanos.io>