Date: Tue, 10 Feb 2004 11:36:11 +0100 From: =?windows-1250?Q?V=E1clav_Haisman?= <V.Haisman@sh.cvut.cz> To: <hackers@freebsd.org> Subject: Re: how to fool gcc? Message-ID: <006a01c3efc1$b3b27710$0a7b2093@amber2> References: <xzpad3r5mj4.fsf@dwp.des.no>
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Fill a GCC PR?
I am not expert in these but is it OK that it evaluates the parameter three
times?
Vaclav Haisman
----- Original Message -----
From: "Dag-Erling Smørgrav" <des@des.no>
To: <hackers@freebsd.org>
Sent: Tuesday, February 10, 2004 10:09 AM
Subject: how to fool gcc?
I'm having trouble with some uncommitted OpenPAM patches that I'd like
to get into the tree. The problem actually doesn't occur with a
normal build, but it prevents me from building a debugging version of
libpam.
Part of the patch declares openpam_log(3) as printf-like so gcc can
check format strings etc. However, openpam_log(3) is also used in
debugging macros such as this:
#define RETURNS(s) do { \
if ((s) == NULL) \
openpam_log(PAM_LOG_DEBUG, "returning NULL"); \
else \
openpam_log(PAM_LOG_DEBUG, "returning '%s'", (s)); \
return (s); \
} while (0)
[...]
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