The DEFAULT_INCLUDES override adds -I. to the src directory. There,
upstream deliberately clears DEFAULT_INCLUDES: with libc++, <format>
includes <stack>, which then resolves to the stack binary in src.
Leave out -I. for the src directory.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Felix Fietkau
f3c75e3562