[patch]: Extension of dlltool to allow new kind of aliasing

[Kai Tietz <ktietz70 at googlemail dot com>]

Hello,

this patch extends dlltool by the capability to allow to export/import
an function as symbol by a different name. It allows that a symbol
'foo' is exported/imported from an inport/export table name 'bar'.
This is an extension, as current implementation just allows to rename
an to be exported symbol.
For example: 'foo = bar' means that the internal symbol 'bar' in
library is exported as 'foo' (with _imp__foo) in to be generated dll
and the export/import table name is 'foo'.
The new syntax 'foo = bar == doo' means that the internal symbol
'bar' in library is exported as 'foo' (with _imp__foo) in to be
generated dll and the export/import table name is 'doo'.

2009-10-21  Kai Tietz  <kai.tietz@onevision.com>

	* defparse.y (EQUAL): New token constant.
	(opt_import_name): New rule for emptry or '==' ID.
	(expline): Add opt_import_name as last line element.
	(impline): Likewise.
	* dlltool.c (ifunct): New member its_name.
	(export): Likewise.
	(append_import): Add its_name argument.
	(defexports): Likewise.
	(defimport): Likewise.
	(scan_drectve_symbols): Adjust calls to def_exports.
	(dump_def_info): Print new optinal import/export table
	symbol name.
	(generate_idata_ofile): Use its_name member.
	(make_one_lib_file): Likewise.
	(nfunc): Take its_name in account on sort.
	* dlltool.h (def_exports): Add its_name as argument.
	(def_import): Likewise.
	* doc/binutils.texi: Add new def file syntax extension.
	* deflex.l (EQUAL): Add rule for '=='.

2009-10-21  Kai Tietz  <kai.tietz@onevision.com>

	* binutils-all/dlltool.exp: Add new test.
	* binutils-all/alias-2.def: New file.

Patch is tested for x86_64-pc-mingw32, i686-pc-cygwin, and
i686-pc-mingw32. Ok to apply on trunk?

Cheers,
Kai

-- 
|  (\_/) This is Bunny. Copy and paste
| (='.'=) Bunny into your signature to help
| (")_(") him gain world domination

Attachment: dlltool_alias.diff
Description: Binary data