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[patch,build] Build libgfortran and libgomp as DLL on win32

From: "François-Xavier Coudert" <fxcoudert at gmail dot com>
To: "fortran at gcc dot gnu dot org" <fortran at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Cc: "Danny Smith" <dannysmith at clear dot net dot nz>, cgf at gcc dot gnu dot org
Date: Tue, 28 Aug 2007 14:47:43 +0100
Subject: [patch,build] Build libgfortran and libgomp as DLL on win32

The attached patch allows libgfortran and libgomp to be built as
shared libraries (DLL) on i386-pc-mingw32. It simply adds
-no-undefined to the linker flags, and checks for support in the
configure.ac: LT_INIT([shared static win32-dll dlopen]).

This was bootstrapped and manually tested on i386-pc-mingw32.
(Building libgomp requires using pthreads-win32 and explicitly
configuring with --enable-libgomp.) I think I need the approval of
build maintainers for this patch, but other opinions are welcome
(especially the windows maintainers).

FX


PS: I intend to do the same for libobjc and libstdc++-v3, but I can't
make it work for libobjc (I'm investigating) and libstdc++-v3 is
currently broken on mingw32. For libssp, I think I'd need some advice:
who maintains it? (there's no listed maintainer AFAICT)

Attachment: win32-dll.ChangeLog
Description: Binary data

Attachment: win32-dll.diff
Description: Binary data

Follow-Ups:
- RE: [patch,build] Build libgfortran and libgomp as DLL on win32
  - From: Danny Smith

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