On 2014-03-27 12:56 +0100, Mathieu Malaterre wrote:
> Package: autoconf
> Version: 2.69-1
> Severity: grave
> Tags: lfs
>
> The file: ./lib/autoconf/specific.m4 contained basically the following C code:
>
> [...]
> #include <sys/types.h>
>
> int main(int argc, char **argv)
> {
> /* Cause a compile-time error if off_t is smaller than 64 bits */
> #define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
> int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T
> % 2147483647 == 1) ? 1 : -1 ];
> return 0;
> }
There is one important difference, though: in autoconf, the
off_t_is_large array is declared _outside_ main(), and current gcc
versions barf with "variably modified 'off_t_is_large' at file scope"
error message on it.
So despite the undefined behavior, packages in the archive are probably
not broken (yet?).
Cheers,
Sven
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