defining knobs in pkgtools.conf question

[Chiang Seng Chang]

Hi,
This is from the lang/python Makefile
=== quote ===
OPTIONS=        THREADS "Enable thread support" on \
                HUGE_STACK_SIZE "Use a larger thread stack" off \
                UCS2 "Use UCS2 instead of UCS4 for unicode support" off \
                PYMALLOC "Uses python's internal malloc" on
.include <bsd.port.pre.mk>
.if defined(WITH_THREADS)
CONFIGURE_ARGS+=        --with-threads
CFLAGS+=                ${PTHREAD_CFLAGS}
.if defined(WITHOUT_HUGE_STACK_SIZE)
CFLAGS+=                -DTHREAD_STACK_SIZE=0x20000
.else
CFLAGS+=                -DTHREAD_STACK_SIZE=0x100000
.endif # defined(WITHOUT_HUGE_STACK_SIZE)
CONFIGURE_ENV+=         LDFLAGS="${PTHREAD_LIBS} ${LDFLAGS}"
.else
CONFIGURE_ARGS+=        --without-threads
.if defined(LDFLAGS)
CONFIGURE_ENV+=         LDFLAGS="${LDFLAGS}"
.endif # defined(LDFLAGS)
.endif # defined(WITH_THREADS)
.if defined(WITHOUT_UCS2)
CONFIGURE_ARGS+=        --enable-unicode=ucs4
.endif
.if defined(WITHOUT_PYMALLOC)
CONFIGURE_ARGS+=        --without-pymalloc
.endif
=== end quote ===
So if I wish to put the knobs into pkgtools.conf so that it can build it 
batch mode, do I:

    WITH_THREADS=1
    WITHOUT_HUGE_STACK_SIZE=1
    WITH_UCS2=1
    WITH_PYMALLOC=1
or
    WITH_THREADS=1
    WITHOUT_HUGE_STACK_SIZE=1
    WITHOUT_UCS2=0
    WITHOUT_PYMALLOC=0
I guess my question is how to decide wheather to use WITH_XXX=1 or 
WITHOUT_XXX=0 ?

does WITH_XXX=0 result in #defined(WITH_XXX) returning false ?
Regards.
-cs
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