[Bug gas/30755] New: RFE: z80: enable OBJ_COMPLEX_RELOC

[hpa at zytor dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30755

            Bug ID: 30755
           Summary: RFE: z80: enable OBJ_COMPLEX_RELOC
           Product: binutils
           Version: 2.42 (HEAD)
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: hpa at zytor dot com
  Target Milestone: ---

Some legacy Z80 object formats, like the z80asm object format used by z88dk,
allows arbitrary expressions on global symbols. The z88dk has expressed an
interest in switching to GNU binutils z80-*-elf, but this issue has held it up
due to concerns about breaking existing code.

As far as I can tell -- and experimentation seems to confirm -- this simply
requires defining OBJ_COMPLEX_RELOC in gas/config/tc-z80.h; the rest is already
handled in generic code.

This would make GNU binutils support the same level of functionality, allowing
this migration.

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