do not pass bogus $(SRC_PATH) include paths to cc during configure Non-existent -I paths are dropped silently by the compiler, but still it is not polite to pass bogus options. Configure-time tests do not need any include files from the source path, so only include -I flags at make time (when they're properly expanded). Signed-off-by: Paolo Bonzini <[email protected]> Signed-off-by: Blue Swirl <[email protected]>