[Bug gas/4799] Common symbols not given type STT_COMMON

[nickc at redhat dot com]

------- Additional Comments From nickc at redhat dot com  2007-10-03 11:01 
-------
Hi Richard,

  I have uploaded a patch which takes a stab at implementing support for the ELF
STT_COMMON type.  Would you care to have a look at it ?

  The issues that I think need to be considered are:

  * What should happen if a symbol is defined by some method other than the
.comm pseudo op and then its type is set to common ?  eg:

        .data
    foo:
        .word 4
        .type foo,STT_COMMON

    At the moment the patch just arbitrarily moves the symbol into the common
section, but is this correct.  Maybe an error message should be issued instead ?

  * The patched assembler will now emit common symbols with the STT_COMMON type
rather than the STT_OBJECT type.  Are there build systems out there that depend
on th eold behaviour ?

  * It is possible to have symbols with the STT_COMMON type but which are not in
the common section.  How should the binutils handle them ?  For now the patch
just treats them like STT_OBJECT symbols, which I think is the correct thing to 
do.

Cheers
  Nick


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http://sourceware.org/bugzilla/show_bug.cgi?id=4799

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