devel/gcc-arm-embedded: fix build with clang 21HEADmain

With clang 21 devel/gcc-arm-embedded fails to build, with errors similar
to:

      /wrkdirs/usr/ports/devel/gcc-arm-embedded/work-default/src/binutils-gdb/binutils/readelf.c:23278:37: error: pointer comparison always evaluates to false [-Werror,-Wtautological-compare]
       23278 |           || inote.namedata + inote.namesz < inote.namedata)
             |                                            ^

and later many instances of:

    In file included from <built-in>:1:
    In file included from /wrkdirs/usr/ports/devel/gcc-arm-embedded/work-default/src/binutils-gdb--gdb/gdb/defs.h:63:
    /wrkdirs/usr/ports/devel/gcc-arm-embedded/work-default/src/binutils-gdb--gdb/gdb/../gdbsupport/enum-flags.h:97:34: error: non-type
          template argument is not a constant expression
       97 |     integer_for_size<sizeof (T), static_cast<bool>(T (-1) < T (0))>::type
          |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /wrkdirs/usr/ports/devel/gcc-arm-embedded/work-default/src/binutils-gdb--gdb/gdb/../gdbsupport/enum-flags.h:134:20: note: in
          instantiation of template class 'enum_underlying_type<ui_out_flag>' requested here
      134 |   typedef typename enum_underlying_type<enum_type>::type underlying_type;
          |                    ^
    /wrkdirs/usr/ports/devel/gcc-arm-embedded/work-default/src/binutils-gdb--gdb/gdb/ui-out.h:385:16: note: in instantiation of template
          class 'enum_flags<ui_out_flag>' requested here
      385 |   ui_out_flags m_flags;
          |                ^
    /wrkdirs/usr/ports/devel/gcc-arm-embedded/work-default/src/binutils-gdb--gdb/gdb/../gdbsupport/enum-flags.h:97:52: note: integer value
          -1 is outside the valid range of values [0, 15] for the enumeration type 'ui_out_flag'
       97 |     integer_for_size<sizeof (T), static_cast<bool>(T (-1) < T (0))>::type
          |                                                    ^

The readelf error is due to it assuming pointer wrapping, which is
undefined behavior. This can be worked around by casting the pointers to
uintptr_t, or by adding -fno-strict-overflow to the CFLAGS (but if you
are messing with the CFLAGS, you might as well disable -Werror).

The enum errors are because it is no longer allowed to cast integer
values to enum values, if they fall outside of the valid range. Upstream
fixed this in
<https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=4a0b2cb7210>,
which applies with a small bit of editing.

PR:		293168
Approved by:	maintainer timeout (2 weeks)
MFH:		2026Q1

0 files changed, 0 insertions, 0 deletions