Date: Thu, 22 Aug 2002 16:53:09 +0200 From: Erik Trulsson <ertr1013@student.uu.se> To: Eugene Grosbein <eugen@grosbein.pp.ru> Cc: stable@freebsd.org Subject: Re: /usr/include/stdlib.h:110: warning: ANSI C does not support `long long' Message-ID: <20020822145308.GA11197@falcon.midgard.homeip.net> In-Reply-To: <20020822223657.A364@grosbein.pp.ru> References: <20020822223657.A364@grosbein.pp.ru>
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On Thu, Aug 22, 2002 at 10:36:57PM +0800, Eugene Grosbein wrote:
> Hi!
>
> I used to maintain some projects written in C at the age of FreeBSD 3.x.
> Programs used to build silently, without any warning on FreeBSD 3.x and
> early 4.x releases using 'gcc -ansi -pedantic -Wall'.
>
> Now I get lots of warning in system includes. For example, in <stdlib.h>:
>
> #include <stdio.h>
> #include <stdlib.h>
>
> int main(void)
> {
> calloc(10,1024*1024);
> return 0;
> }
>
> /* EOF */
>
> # gcc -ansi -pedantic -Wall test.c
> In file included from test.c:4:
> /usr/include/stdlib.h:110: warning: ANSI C does not support `long long'
> /usr/include/stdlib.h:114: warning: ANSI C does not support `long long'
>
> Why?
Because gcc no longer treats the header files in /usr/include
specially. It used to suppress warnings from system headers but no
longer treats them as system headers. I don't know why this change was
made but it was made.
The warning is technically correct but you can ignore it.
(stdlib.h does use 'long long' and the original C standard did not have
long long, but since the new C standard does support long long it is not
much of a problem if it is used.)
To get rid of it either stop using -pedantic or add
-Wno-long-long to the invocation of gcc.
(Or you can do as I did, and patch gcc to no longer produce warnings
about 'long long' unless specifically requested by -Wlong-long . The
following patch will do this:
Index: contrib/gcc/c-decl.c
===================================================================
RCS file: /ncvs/src/contrib/gcc/c-decl.c,v
retrieving revision 1.1.1.4.2.3
diff -u -r1.1.1.4.2.3 c-decl.c
--- contrib/gcc/c-decl.c 21 Jun 2002 22:38:03 -0000 1.1.1.4.2.3
+++ contrib/gcc/c-decl.c 8 Jul 2002 06:58:21 -0000
@@ -491,7 +491,7 @@
/* Nonzero means warn about usage of long long when `-pedantic'. */
-int warn_long_long = 1;
+int warn_long_long = 0;
/* Nonzero means message about use of implicit function declarations;
1 means warning; 2 means error. */
--
<Insert your favourite quote here.>
Erik Trulsson
ertr1013@student.uu.se
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