* read.c (pseudo_set): Don't allow global register symbol only
if TC_GLOBAL_REGISTER_SYMBOL_OK is undefined.
* symbols.c (S_SET_EXTERNAL): Likewise.
* config/tc-mmix.h (TC_GLOBAL_REGISTER_SYMBOL_OK): Defined.
* doc/internals.texi: Document TC_GLOBAL_REGISTER_SYMBOL_OK.
- allowing true forward references (which will always assume the referenced
symbols have at the point of use) through the new .eqv pseudo-op and the
new == operator
- disallowing changing .equiv-generated equates (so that the protection this
provides is both forward and backward)
- snapshotting equates when their value gets changed so that previous uses
don't get affected by the new value.
- allowing expressions in places where absolute expressions (or register
names) are needed which were not completely resolvable at the point of
their definition but which are fully resolvable at the point of use
In addition it fixes PR/288.
base-plus-offset relocs to the linker.
* config/tc-mmix.c: Tweak and fix typos in comments.
(allocate_undefined_gregs_in_linker): New variable.
(OPTION_LINKER_ALLOCATED_GREGS): New option macro.
(md_longopts): Add --linker-allocated-gregs.
(md_parse_option) <case 'x'>: Imply --linker-allocated-gregs.
<case OPTION_LINKER_ALLOCATED_GREGS>: New.
(md_show_usage): Update text for -x. Add text for
--linker-allocated-gregs.
(tc_gen_reloc): Derive default value for addend from val and
baddsy. Use addsec and bfd_is_abs_section in more places. Don't
emit error for BFD_RELOC_MMIX_BASE_PLUS_OFFSET without suitable
GREG if allocate_undefined_gregs_in_linker.
* doc/as.texinfo (Overview) <Target MMIX options>: Add
--linker-allocated-gregs.
* doc/c-mmix.texi (MMIX-Opts): Add blurb about
--linker-allocated-gregs. Mention that it's implied by -x.
(MMIX-Pseudos) <GREG>: Mention when and how a GREG can be omitted.
(MMIX-mmixal): Clarify dated comparison and location of MMIXware.
* config/tc-mmix.h (md_parse_name): Use ISUPPER, not isupper.
