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[PATCH mingw/gold] Fix mingw gold build with plugins enabled for non-dlfcn case

From: Pavel Chupin <pavel dot v dot chupin at gmail dot com>
To: binutils at sourceware dot org
Date: Fri, 28 Dec 2012 22:41:14 +0400
Subject: [PATCH mingw/gold] Fix mingw gold build with plugins enabled for non-dlfcn case

Hi,
Attached patch fixes mingw build configured (for example) as:

../configure --prefix=`pwd`/../INSTALL --target=i686-linux-android
--host=i586-pc-mingw32msvc --build=i386-linux-gnu --enable-plugins
--enable-gold
make

Error message:

../../gold/plugin.cc:32:19: fatal error: dlfcn.h: No such file or directory

I'm fixing it like it's done in bfd configure: check for headers and
library, add/not-add -ldl on link.
Also adding windows.h case into plugin.cc to handle case when
mingw-dlfcn is not installed on the system.

ChangeLog:

2012-12-25  Pavel Chupin  <pavel.v.chupin@intel.com>

       Fix mingw gold build with plugins enabled
       * gold/Makefile.am: Replace -ldl with @lt_cv_dlopen_libs@.
       * gold/aclocal.m4: Include libtool modules.
       * gold/configure.ac: Export lt_cv_dlopen_libs and add headers check.
       * gold/plugin.cc: Handle non-dlfcn case.
       * gold/Makefile.in: Regenerate.
       * gold/config.in: Regenerate.
       * gold/configure: Regenerate.
       * gold/testsuite/Makefile.in: Regenerate.

Ok for trunk?

--
Pavel Chupin
Intel Corporation

Attachment: gold-mingw-plugins.patch
Description: Binary data

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