A symbol version patch for glibc 2.x compatibility

[Nick Clifton]

Hi H.J.

  I am not familiar with this versioning stuff, so please could you
  help me understand your patch by answering a few questions:

: I modified as so that it will
: 
: 1. Allow duplicated version name like
: 
: 	.symver bar,bar@GLIBC_2.1
: 	.symver bar,bar@GLIBC_2.1

Why do you need this ability ?  (I have no objections to it, I am just
wondering whether there ought to be a warning generated if a second,
duplicate, definition is encountered).

: ----
: 	.file	"x.c"
: 	.version	"01.01"
: 	.symver bar,bar@GLIBC_2.1
: 	.symver bar,bar@GLIBC_2.1
: 	.globl foobar
: foobar:
: 	.long foo
: 	.symver foobar,foobar@GLIBC_2.1
: dummy:
: 	.long foo
: 	.symver foo,foo@GLIBC_2.1
: -----

Does this really work ?  I thought that the symbol defined in a
.symver op had to be defined in the same file.  Quoting from the as
info file:

   For ELF targets, the `.symver' directive is used like this:

     .symver NAME, NAME2@NODENAME

   In this case, the symbol NAME must exist and be defined within the
   file being assembled.  The `.versym' directive effectively creates
   [snip]

Or is this your point about removing unneeded version symbols ?  (In
which case maybe the documentation ought to be updated as well).

Other than that, I think that the patch is OK.  So, please could you
extend your patch to update the documentation, and also include a new
testsuite case to check the new functionality.

Cheers
	Nick