On 4/10/19 7:13 AM, Jonathan Wakely wrote:
For options that can be used as -foo or -foo=level we have a variety
of different styels for documenting what the default level is. See
below for several examples. I find this a bit confusing when try to
see what it means to use the option without a level.
Do we want to pick a style and try to be consistent?
yes?
All the examples you give leave something to be desired.
For -Wformat-overflow we show the option with and without the level:
@item -Wformat-overflow
@itemx -Wformat-overflow=1
@opindex Wformat-overflow
@opindex Wno-format-overflow
Level @var{1} of @option{-Wformat-overflow} enabled by @option{-Wformat}
The @item is the clearest to read, and also the most accurate as it
shows you can provide it without a level. But from that snippet there's
no indication what not giving a level gets you. There needs to be some
words somewhere to say what it maps to.
For -Wshift-overflow we use prose to say what omitting the level
means:
@item -Wshift-overflow=1
This is the warning level of @option{-Wshift-overflow} and is enabled
by default in C99 and C++11 modes (and newer).
.. for example that, I can't tell if I can say just -Wshift-overflow and
get level 1, or if I'll get level 1 whatever unless I say
-Wno-shift-overflow
For -Warray-bounds we list both options separately, and then also list
the forms with levels and say what no level means:
@item -Warray-bounds
@itemx -Warray-bounds=@var{n}
@opindex Wno-array-bounds
@opindex Warray-bounds
This option is only active when @option{-ftree-vrp} is active
(default for @option{-O2} and above). It warns about subscripts to arrays
that are always out of bounds. This warning is enabled by @option{-Wall}.
@table @gcctabopt
@item -Warray-bounds=1
This is the warning level of @option{-Warray-bounds} and is enabled
by @option{-Wall}; higher levels are not, and must be explicitly
requested.
In context with the other levels, I see that is trying to tell you that
1 is the default, but it's unclear. My first reading was that 1 gets
you a warning level, (with the implication that 2 got you an error level
or something?)
nathan
--
Nathan Sidwell
