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[patch c++]: Add special code for linker-plugin and libstdc++

From: Kai Tietz <ktietz70 at googlemail dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Cc: Jason Merrill <jason at redhat dot com>, Dave Korn <dave dot korn dot cygwin at gmail dot com>
Date: Mon, 17 Jan 2011 20:16:48 +0100
Subject: [patch c++]: Add special code for linker-plugin and libstdc++

Hello,

By running for x86_64-w64-mingw32 target g++.dg's testsuite
(torture/stackalign/stackalign.exp)
I noticed that some LTO tests are failing due unresolved symbols,
which are part of libstc++.
By this I found that c++ driver did not add for enabled linker-plugin
linker-specific option
-plugin-opt=-pass-through=-l<library-name> for libstdc++ and libm.a.

2011-01-17  Kai Tietz

	* g++spec.c (lang_specific_driver): Add
	linker specific options for libstdc++/libm when
	LTO and linker-plugin are used.


Tested for x86_64-pc-linux-gnu and x86_64-w64-mingw32. Ok for apply?


Regards,
Kai

Attachment: cxx_linker_plugin.txt
Description: Text document

Follow-Ups:
- Re: [patch c++]: Add special code for linker-plugin and libstdc++
  - From: Richard Guenther

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