1 files changed, 44 insertions, 0 deletions
diff --git a/gcc/f/runtime/libU77/isatty_.c b/gcc/f/runtime/libU77/isatty_.c
new file mode 100644
index 00000000000..92c33468f53
--- /dev/null
+++ b/gcc/f/runtime/libU77/isatty_.c
@@ -0,0 +1,44 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of GNU Fortran libU77 library.
+
+This library is free software; you can redistribute it and/or modify it
+under the terms of the GNU Library General Public License as published
+by the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+GNU Fortran 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with GNU Fortran; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#if HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
+#include "f2c.h"
+#include "fio.h"
+
+#ifdef KR_headers
+extern integer G77_fnum_0 ();
+
+logical G77_isatty_0 (lunit)
+     integer *lunit;
+#else
+extern integer G77_fnum_0 (integer *);
+
+logical G77_isatty_0 (integer *lunit)
+#endif
+{
+  if (*lunit>=MXUNIT || *lunit<0)
+    err(1,101,"isatty");
+  /* f__units is a table of descriptions for the unit numbers (defined
+     in io.h) with file descriptors rather than streams */
+  return (isatty(G77_fnum_0 (lunit)) ? TRUE_ : FALSE_);
+}