makefile: Show CC flags at the start of compilation
makefile: Show CC flags at the start of compilation

mgjv/libusual,ifduyue/libusual,rabbitt/libusual,mgjv/libusual,mgjv/libusual,ifduyue/libusual,markokr/libusual,markokr/libusual,ifduyue/libusual,rabbitt/libusual,ifduyue/libusual,rabbitt/libusual,mgjv/libusual,markokr/libusual,markokr/libusual,rabbitt/libusual