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2003 Jan 10 14:23

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Re: [vox-tech] is this a glibc bug?
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Re: [vox-tech] is this a glibc bug?



On Thu, 2003-01-09 at 14:17, Peter Jay Salzman wrote:
> hola,
> 
> 
> #include <stdio.h>
> #include <math.h>
> 
> int main(void)
> {
>    int y1 = 9;
>    printf("%d\n", y1);
>    return 0;
> }
> 
> p@satan% gcc -Wshadow blah.c  -lm
> blah.c: In function `main':
> blah.c:6: warning: declaration of `y1' shadows global declaration
> 
> 
> the problem is that there's a global variable named "y1" in
> /usr/include/bits/mathcalls.h which gets included by math.h.
> 
> so GNU glibc has ruined the variable name "y1".
> 
> would this be considered a glibc bug?   if they're going to ruin a
> variable name, they should at least document it like errno, _ and __
> type variables.

Although its a rather poor choice for a name, it's not a bug
strictly speaking, since it's declared publicly. Also, I believe
it's actually a function -- see 'man y1'.

dave

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