Article View: gnu.gcc.bug
Article #1476potential gcc-error
From: Stefan Ullrich
Date: Mon, 23 Nov 1992 19:05
Date: Mon, 23 Nov 1992 19:05
51 lines
1826 bytes
1826 bytes
Dear Sirs,
this a bug report to gcc-2.3.1.
It is a little bug we found in the gcc-2.3.1. It causes no errors
during programm execution but is a little bit confusing since you get a
warning from the compiler.
The problem is that gcc-2.3.1 doesnot accept without warning the
smallest possible integer for a signed long int if it is written in
decimal (-2147483648). It accepts the same value as hex number
(0x80000000). It also accepts the int number (-2147483647) without
warning. We havenot found any problems during execution.
We wrote a little programm to demonstrate the behaviour of gcc-2.3.1.
This is the little programm called `example.c':
> #include <stdio.h>
>
>
> int main(void){
>
> long int i,j;
>
> i = -2147483648;
> j = 0x80000000;
> printf("\nmax_neg_dez : %d", i);
> printf("\nmax_neg_hex : %d\n\n", j);
> return;
> }
This the compiler call:
> gcc -o example example.c
This is the error message that was produced by gcc:
> example.c: In function `main':
> example.c:8: warning: integer constant is so large that it is unsigned
This is the ouput produced by `example':
>
> max_neg_dez : -2147483648
> max_neg_hex : -2147483648
>
We hope that this bug report will help to improve the new release of gcc.
Many thanks to all who worked on this compiler. It is a great advance
for our work.
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Newsgroups: gnu.gcc.bug Path: arc1-ca.pugleaf.net!sparky!uunet!cis.ohio-state.edu!digtec.dtro.e-technik.TH-darmstadt.DE!stu From: stu@digtec.dtro.e-technik.TH-darmstadt.DE (Stefan Ullrich) Subject: potential gcc-error Message-ID: <9211231705.AA10393@mailhost.digtec.dtro.e-technik.th-darmstadt.de> Sender: gnulists@ai.mit.edu Organization: GNUs Not Usenet Distribution: gnu Date: Mon, 23 Nov 1992 19:05:17 GMT Approved: bug-gcc@prep.ai.mit.edu Lines: 52