configure.ac says:
CFLAGS="${default_CFLAGS} ${extended_CFLAGS}";
This overwrites any CFLAGS the user may have specified. Please don't! You can of course add your own CFLAGS before and/or after what the user specifies, but please don't completely ignore what the user specifies.
configure.ac says:
This overwrites any CFLAGS the user may have specified. Please don't! You can of course add your own CFLAGS before and/or after what the user specifies, but please don't completely ignore what the user specifies.