# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4
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# PortGroup active_variants 1.1
# if {![catch {set result [active_variants $depspec $required $forbidden]}]} {
# # code to be executed if $depspec is active with at least all variants in
# # $required and none from $forbidden
# # code to be executed if $depspec is active, but either not with all
# # variants in $required or any variant in $forbidden
# # code to be executed if $depspec isn't active
# is the name of the port you're trying to check (required), which can be
# specified as either just the port, or via "(bin|lib|path):FOO:port"
# as accepted by the dependency parser.
# is a list of variants that must be enabled for the test to succeed
# (required; remember this can also be a space-separated string or just
# a string for a single value. It's interpreted as list, though.)
# is a list of variants that may not be enabled for the test to succeed
# (default is empty list, see description of $required for values that can be
# interpreted as list by Tcl)
# In situations where you know that a version of the port is active (e.g., when
# checking in pre-configure of a port and the checked port is a dependency),
# this can be simplified to: