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docs: hacking: remove reference to ATTRIBUTE_FORMAT

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Prefer G_GNUC_PRINTF.

Also, pick another example than virAsprintf since it may get
removed in the future.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
This commit is contained in:
Ján Tomko 2019-10-18 23:16:46 +02:00
parent 2d0b8560ce
commit 6cc9b74e0e
1 changed files with 3 additions and 3 deletions
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6
docs/hacking.html.in
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@ -1379,12 +1379,12 @@ BAD:
Whenever you add a new printf-style function, i.e., one with a format
string argument and following "..." in its prototype, be sure to use
gcc's printf attribute directive in the prototype. For example, here's
the one for virAsprintf, in util.h:
the one for virCommandAddEnvFormat in vircommand.h:
</p>
<pre>
int virAsprintf(char **strp, const char *fmt, ...)
ATTRIBUTE_FORMAT(printf, 2, 3);
void virCommandAddEnvFormat(virCommandPtr cmd, const char *format, ...)
G_GNUC_PRINTF(2, 3);
</pre>
<p>