[Bug gold/14330] failure to link global hidden symbol

[ccoutant at google dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14330

--- Comment #6 from Cary Coutant <ccoutant at google dot com> 2012-07-09 
16:40:12 UTC ---
> This is a wild guess, but I think your asm code is getting placed in a
> random section depending on the other options. Try adding a ".text"
> statement in the function definition below:

To expand a bit on this, the "relocation refers to discarded section"
error typically indicates that we discarded a COMDAT section that
defined a symbol x, where the kept COMDAT section did not define x.
Any references to x from outside the COMDAT group will then produce
this error.

If the definition for getHostCallReturnValue immediately follows a
function that is defined in a normal .text section, everything will
work fine. If you change your -D options such that it follows a
different function that happens to be defined in a COMDAT section
(e.g., an out-of-line inline produced because you're compiling with
-g), your function will then get added to that same COMDAT section,
and you will see a failure whenever the linker discards that section
in favor of an earlier instance of the same COMDAT group.

-cary

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