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Re: gcc 3.4 Compiler warning

From: Christian Ehrlicher <ehrlicher at deneg dot de>
To: Falk Hueffner <falk dot hueffner at student dot uni-tuebingen dot de>
Cc: gcc-help at gcc dot gnu dot org
Date: Tue, 17 Feb 2004 12:04:16 +0100
Subject: Re: gcc 3.4 Compiler warning
References: <4031ECD1.1060606@deneg.de> <87isi6ougf.fsf@student.uni-tuebingen.de>

Thx for the quick answer. :)

Christian

Falk Hueffner schrieb:

Christian Ehrlicher <ehrlicher@deneg.de> writes:

I got following warning where I don't expect.
"null argument where non-null required (arg 2)"

memmove(tmp1,0,MY_RET_DEF_SIZ(0));

It works because MY_RET_DEF_SIZ return 0 and so I think the warning
isn't usefull there.

The warning is correct; the standard requires a valid pointer even if
the length is zero. This is not very likely to cause problems with
actual implementations, though.

References:
- gcc 3.4 Compiler warning
  - From: Christian Ehrlicher
- Re: gcc 3.4 Compiler warning
  - From: Falk Hueffner

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