Defining port options through variables makes it somewhat hard to
visualize. Could we consider a visual definition?
OPTIONS_VISUAL= \
/* normal options */ \
FOO "Build with Foo support" \
BAR "Runtime BAR support" \
/* only one */ \
radio[ \
A "Use A for something" \
B "Use B instead" \
C "Use C instead of A or B" \
] \
/* at least one */ \
multi[ \
X "Include X support" \
Y "Include Y support" \
Z "Include Z support" \
] \
/* zero or more */ \
group[ \
H "Use H for something" \
I "Use I for something" \
J "Use J for something" \
]
The [] delimiters and C-style comments are arbitrary, just what I tried
that does not conflict with normal make(1) syntax.
The description of standard definitions could be left empty, to get a
default value:
[NLS] ""
This would all be parsed into the normal OPTIONS variables, so either
style of options definitions could be used and no other changes would
need to be made.
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