Document logic for __DEFAULT_DEPENDENT_OPTIONS

Reviewed by:	stevek
Differential Revision:	https://reviews.freebsd.org/D21640
This commit is contained in:
Simon J. Gerraty 2019-09-16 00:32:23 +00:00
parent 3a97344265
commit 84bfb424e2

View File

@ -11,12 +11,16 @@
# For each option FOO in __DEFAULT_NO_OPTIONS, MK_FOO is set to "no",
# unless WITH_FOO is defined, in which case it is set to "yes".
#
# For each entry FOO/BAR in __DEFAULT_DEPENDENT_OPTIONS,
# MK_FOO is set to "no" if WITHOUT_FOO is defined,
# "yes" if WITH_FOO is defined, otherwise the value of MK_BAR.
#
# If both WITH_FOO and WITHOUT_FOO are defined, WITHOUT_FOO wins and
# MK_FOO is set to "no" regardless of which list it was in.
#
# Both __DEFAULT_YES_OPTIONS and __DEFAULT_NO_OPTIONS are undef'd
# after all this processing, allowing this file to be included
# multiple times with different lists.
# All of __DEFAULT_YES_OPTIONS, __DEFAULT_NO_OPTIONS and
# __DEFAULT_DEPENDENT_OPTIONS are undef'd after all this processing,
# allowing this file to be included multiple times with different lists.
#
# Other parts of the build system will set BROKEN_OPTIONS to a list
# of options that are broken on this platform. This will not be unset