[PATCH v1 0/1] s390: Deprecate s390 32-bit target "s390-*"

[Jens Remus]

Linux Kernel 6.19 removed s390 32-bit compatibility support. [1]
Glibc 2.43 deprecated s390 32-bit [2] and will remove it with
Glibc 2.44 [3].  GCC 16 will deprecate s390 32-bit (compiler option
-m31) with the intent to remove it in a future release. [4]

This deprecates s390 32-bit (target "s390-*" and format "elf32-s390")
in the upcoming Binutils release with the intent to remove it in a
future release.

s390 32-bit deprecation/removal overview:
- Linux Kernel 6.19 (February 2026) removed s390 32-bit compat
- Glibc 2.43 (January 2026) deprecated s390 32-bit
- GCC 16 (expected April 2026) will deprecate s390 32-bit
- Glibc 2.44 (expected August 2026) will remove s390 32-bit
- Binutils 2.47 (expected August 2026) would deprecate s390 32-bit
- Binutils 2.48 (expected February 2027) would remove s390 32-bit
- GCC 17 (expected April 2027) would remove s390 32-bit

Removal of s390 32-bit support in Binutils could also be deferred to
Binutils 2.49 (expected August 2027) if that would be preferable, so
that Binutils removes it after GCC.

Feedback is much appreciated!

[1]: Linux kernel 6.19 commit 8e0b986c59c6 ("s390: Remove compat support"),
     https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8e0b986c59c6
[2]: Glibc 2.43 commit 638d437dbf9c ("Deprecate s390-linux-gnu (31bit)"),
     https://sourceware.org/git/glibc.git?a=commitdiff;h=638d437dbf9c
[3]: Glibc 2.44 patch series "[PATCH 0/5] Remove s390-linux-gnu (31bit)",
     https://inbox.sourceware.org/libc-alpha/20260409085102.3475867-1-stli@linux.ibm.com/
[4]: GCC 16 commit 5886bb453a6a ("s390: Deprecate -m31"),
     https://gcc.gnu.org/git/gcc.git?h=5886bb453a6a

Thanks and regards,
Jens

Jens Remus (1):
  s390: Deprecate s390 32-bit target "s390-*"

 bfd/config.bfd | 1 +
 binutils/NEWS  | 8 ++++++++
 2 files changed, 9 insertions(+)

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2.51.0