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Built-in bzero in GCC 3.0.2
- To: gcc at gcc dot gnu dot org
- Subject: Built-in bzero in GCC 3.0.2
- From: Eli Zaretskii <eliz at gnu dot org>
- Date: Sun, 04 Nov 2001 10:51:38 -0500
- Reply-to: Eli Zaretskii <eliz at is dot elta dot co dot il>
While compiling the readline library in the latest GDB pretest 5.0.92,
GCC 3.0.2 prints numerous warnings like this:
gcc -c -DHAVE_CONFIG_H -I. -I. -Id:/usr/djgpp/include
-DRL_LIBRARY_VERSION='"4.1"' -g -O2 readline.c
In file included from rldefs.h:53,
d:/usr/djgpp/include/string.h:53: warning: conflicting types for
built-in function `bzero'
(As you see, I used the DJGPP port here.)
The bzero's prototype in DJGPP's string.h is this:
void * bzero(void *ptr, size_t _len);
Could someone please tell what prototype of bzero does GCC expect?
More generally, how can one know what prototypes does GCC expect from
functions it treats as built-in?
Finally, assuming that modifying the system headers is not an option,
is there any GCC command-line option I can use to avoid this warning?
(I know about -fno-nonansi-builtins, but will older versions of GCC
swallow it without barfing?)
P.S. Please CC me on your replies, since I don't subscribe to this