On Thu, Jun 02, 2022 at 05:46:05PM +0200, Petr Pisar wrote:
> $ gcc -m32 -D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64 main.c
> $ ./a.out
> sizeof(time_t)=8
> 
> I recommend you to file a bug against tar in Fedora's Bugzilla. However, this
> proposed solution would require rebuilding in the same way all libraries which
> tar uses and which pass time_t and similar types in their interface. That
> would probably break other packages.

Now that the kernel and glibc have this feature, would it make sense
to change the global CFLAGS to build everything with 64-bit time_t on
all currently supported 32-bit archs? If not now, how close to the
32-bit overflow in 2038?

It's not just about keeping current time and file timestamps. There
are applications/libraries that calculate future dates and overflows
can lead to serious issues.

Switching to 64-bit time_t may require some patching, e.g. when the
code assumes sizeof(long) == sizeof(time_t).

-- 
Miroslav Lichvar
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