1 files changed, 41 insertions, 0 deletions
diff --git a/include/assert.h b/include/assert.h
new file mode 100644
index 000000000..3963b4fb4
--- /dev/null
+++ b/include/assert.h
@@ -0,0 +1,41 @@
+// -*- C++ -*-
+/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+groff 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License along
+with groff; see the file COPYING.  If not, write to the Free Software
+Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef ASSERT_H
+#define ASSERT_H
+#ifdef __GNUG__
+volatile
+#endif
+void assertion_failed(int, const char *);
+
+inline void do_assert(int expr, int line, const char *file)
+{
+  if (!expr)
+    assertion_failed(line, file);
+}
+#endif /* ASSERT_H */
+
+#undef assert
+
+#ifdef NDEBUG
+#define assert(ignore) /* as nothing */
+#else
+#define assert(expr) do_assert(expr, __LINE__, __FILE__)
+#endif