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invoke.texi (-Wformat): Document what format features are checked.

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* invoke.texi (-Wformat): Document what format features are
	checked.

From-SVN: r38103
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Joseph Myers 2000-12-07 07:38:13 +00:00 committed by Joseph Myers
parent 74601d7c09
commit 8308e0b786
2 changed files with 15 additions and 0 deletions
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@ -1,3 +1,8 @@
2000-12-07 Joseph S. Myers <jsm28@cam.ac.uk>
* invoke.texi (-Wformat): Document what format features are
checked.
2000-12-06 Kazu Hirata <kazu@hxi.com>
* config/h8300/h8300.h: Fix formatting.

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gcc/invoke.texi
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@ -1598,6 +1598,16 @@ Check calls to @code{printf} and @code{scanf}, etc., to make sure that
the arguments supplied have types appropriate to the format string
specified.
The formats are checked against the format features supported by GNU
libc version 2.2. These include all ISO C89 and C99 features, as well
as features from the Single Unix Specification and some BSD and GNU
extensions. Other library implementations may not support all these
features; GCC does not support warning about features that go beyond a
particular library's limitations. However, if @samp{-pedantic} is used
with @samp{-Wformat}, warnings will be given about format features not
in the selected standard version. @xref{C Dialect Options,,Options
Controlling C Dialect}.
@samp{-Wformat} is included in @samp{-Wall}. For more control over some
aspects of format checking, the options @samp{-Wno-format-y2k},
@samp{-Wno-format-extra-args}, @samp{-Wformat-nonliteral} and