[PATCH] Raise the minimum binutils version to 2.39

[Florian Weimer]

* Stefan Liebler:

> The recent commit 27b96e069aad17cefea9437542180bff448ac3a0 raises the minimum
> GCC version to 12.1 which was released in 2022.
>
> The current minimum bintuils version 2.25 was released end of 2014.  This patch
> now raises the minimum binutils version to 2.39 which was also released in 2022.
>
> For ARC and powerpc, the special checks/hints are not needed anymore.
>
> On s390x, the used cfi_escape for cfi_val_offset can now be ommitted.
>
> In sysdeps/[alpha|hppa|csky]/configure.ac, PIE is unsupported with this comment:
> PIE builds fail on binutils 2.37 and earlier, see:
> https://sourceware.org/bugzilla/show_bug.cgi?id=28672
> This patch keeps PIE unsupported and let the machine maintainers test and
> enable it later.
>
> In sysdeps/arm/configure.ac, there is a check whether TPOFF relocs with addends
> are assembled correctly, which is known to be broken in binutils 2.24 and 2.25.
> See: https://sourceware.org/bugzilla/show_bug.cgi?id=18383
> This patch keeps the check as is and let the machine maintainers check if it
> still required.

The risk here is that this binutils version introduces new relocation
types into the crt*.o files (or libc_nonshared.a or even libc.a) that
cannot be handled by older binutils.  This is different from bumping the
GCC requirement, which usually does not impose a compiler upgrade after
installing glibc.

Certain binutils versions even treat unknown relocation types as type 0,
leading to very difficult-to-debug misbehavior (unless you happen to
recall that you have seen this before …).

Thanks,
Florian