libgomp routines for mingw32

["François-Xavier Coudert" <fxcoudert at gmail dot com>]

Attached patch enables compilation of libgomp and use of -fopenmp in
the resulting compiler on i386-pc-mingw32 when pthreads-win32
(http://sourceware.org/pthreads-win32/) is present.

In libgomp, a new config/mingw32 directory is created to contain the
windows-specific time routines (which are not very elegant, but then,
is sufficient for most uses, and could be improved with better code
later).

In gcc/config/i386/mingw32.h, GOMP_SELF_SPECS is defined so that
-fopenmp doesn't imply -pthread.

Bootstrapped on i386-pc-mingw32, with both C and Fortran. Tested on
simple C and Fortran OpenMP codes, as well as a huge quantum chemistry
package.

OK for mainline?


Thanks,
FX


:ADDPATCH libgomp:
Index: libgomp/configure.tgt
===================================================================
--- libgomp/configure.tgt	(revision 114263)
+++ libgomp/configure.tgt	(working copy)
@@ -91,6 +91,10 @@
 	XLDFLAGS="${XLDFLAGS} -lrt"
 	;;
 
+  *-*-mingw32*)
+	config_path="mingw32 posix"
+	;;
+
   *)
 	;;
 
Index: libgomp/config/mingw32/time.c
===================================================================
--- libgomp/config/mingw32/time.c	(revision 0)
+++ libgomp/config/mingw32/time.c	(revision 0)
@@ -0,0 +1,49 @@
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+   Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>
+
+   This file is part of the GNU OpenMP Library (libgomp).
+
+   Libgomp is free software; you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation; either version 2.1 of the License, or
+   (at your option) any later version.
+
+   Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
+   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+   FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
+   more details.
+
+   You should have received a copy of the GNU Lesser General Public License 
+   along with libgomp; see the file COPYING.LIB.  If not, write to the
+   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+/* As a special exception, if you link this library with other files, some
+   of which are compiled with GCC, to produce an executable, this library
+   does not by itself cause the resulting executable to be covered by the
+   GNU General Public License.  This exception does not however invalidate
+   any other reasons why the executable file might be covered by the GNU
+   General Public License.  */
+
+/* This file contains timer routines for mingw32.  */
+
+#include "libgomp.h"
+#include <unistd.h>
+#include <sys/timeb.h>
+
+double
+omp_get_wtime (void)
+{
+  struct _timeb timebuf;
+  _ftime (&timebuf);
+  return (timebuf.time + (long)(timebuf.millitm) / 1e3);
+}
+
+double
+omp_get_wtick (void)
+{
+  return 1e-3;
+}
+
+ialias (omp_get_wtime)
+ialias (omp_get_wtick)
Index: gcc/config/i386/mingw32.h
===================================================================
--- gcc/config/i386/mingw32.h	(revision 114263)
+++ gcc/config/i386/mingw32.h	(working copy)
@@ -108,3 +108,7 @@
 /* Define as short unsigned for compatibility with MS runtime.  */
 #undef WINT_TYPE
 #define WINT_TYPE "short unsigned int"
+
+/* mingw32 doesn't understand the -pthread option.  */
+#undef GOMP_SELF_SPECS
+#define GOMP_SELF_SPECS ""

Attachment: libgomp-mingw32.ChangeLog
Description: Binary data