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docs: hacking: remove reference to ATTRIBUTE_FORMAT 

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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@ -1379,12 +1379,12 @@ BAD:
Whenever you add a new printf-style function, i.e., one with a format 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 string argument and following "..." in its prototype, be sure to use
gcc's printf attribute directive in the prototype. For example, here's 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> </p>
<pre> <pre>
int virAsprintf(char **strp, const char *fmt, ...) void virCommandAddEnvFormat(virCommandPtr cmd, const char *format, ...)
ATTRIBUTE_FORMAT(printf, 2, 3); G_GNUC_PRINTF(2, 3);
</pre> </pre>
<p> <p>