Bug#634261: Requesting clarification
On Sun, Nov 27, 2011 at 11:24:30PM +0000, Jurij Smakov wrote:
> Mike, can you clarify a bit how glibc is failing to meet your
> expectations here? I don't mind trying to work on this bug, but with
> the available information I don't quite understand the problem. Is it
> expected that glibc should work correctly even if _IO_stdin_used
> symbol is not exported? If you could provide a simple test case
> demonstrating the issue, it would be great too.
What is fishy is that only sparc is affected. So whatever it's doing on
sparc, it's doing it differently from other architectures.
As for a small test case:
$ cat > foo.c <<EOF
#include <stdio.h>
int main() {
setbuf(stdout, 0);
return 0;
}
EOF
$ cat > ver <<EOF
{
local: *;
};
EOF
$ gcc -o foo foo.c -Wl,--version-script,ver
$ ./foo
Bus error
As a matter of fact, despite the version script, the stdout symbol is
still exported. I guess the real problem is that _IO_stdin_used is not
defined the same way.
Mike
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