[Bug ld/797] Alignment in empty section changes the output layout

[amodra at bigpond dot net dot au]

------- Additional Comments From amodra at bigpond dot net dot au  2005-06-09 
23:58 -------
I disagree.  An assignment to "dot" inside an output section statement that
moves "dot" has made the section non-empty.  There is no fundamental difference
between an assignment to "dot" with ALIGN on the rhs and other assignments to 
"dot".

If you want to align a section, use

  .text2 ALIGN(4096) :
  {
    *(.text2)
  }

This will be removed, and following sections not affected by the alignment, if
all the .text2 input sections are empty.  Aligning both the start and end of a
section also allows the section to be removed:

  .text2 ALIGN (4096) :
  {
    *(.text2)
    . = ALIGN (4096);
  }

Aligning only the end of a section is a little tricky, but can be accomplished 
with:

  .text3 :
  {
    *(.text3)
    . = ALIGN (. != 0 ? 4096 : 1);
  }

This also will allow the section to be removed if no non-zero sized .text3 input
sections are linked.

-- 


http://sources.redhat.com/bugzilla/show_bug.cgi?id=797

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