M. Warner Losh wrote:
In message: <[EMAIL PROTECTED]>
Darren Pilgrim <[EMAIL PROTECTED]> writes:
: M. Warner Losh wrote:
: > So if you make WITH_SSP off by default, then having WITH_SSP in the
: > src.conf can't be overridden. If you have it on by default, having
: > WITHOUT_SSP in the src.conf file can't be overriden. this appears to
: > be an unintended flaw with the with/without stuff. I'm not sure the
: > right way to compensate.
:
: I can't speak for the "right" way, but if you specify the variable in
: src.conf/make.conf with ?= instead of =, you can override it on the
: command-line:
:
: # grep KERNCONF /etc/make.conf
: KERNCONF?=TTPWEB
: # make -V KERNCONF
: TTPWEB
: # env KERNCONF=SOMETHING_ELSE make -V KERNCONF
: SOMETHING_ELSE
?= doesn't mesh well with WITH/WITHOUT because then it will always be
defined, thus defeating its purpose.
Use .ifndef to define WITH/WITHOUT iff its counterpart is undef:
.ifndef WITHOUT_FOO
WITH_FOO=def
.endif
--
Darren Pilgrim
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