Adding upstream version 5.2.37.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

include/stdc.h

@@ -0,0 +1,89 @@
+/* stdc.h -- macros to make source compile on both ANSI C and K&R C
+   compilers. */
+
+/* Copyright (C) 1993-2021 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash 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 3 of the License, or
+   (at your option) any later version.
+
+   Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if !defined (_STDC_H_)
+#define _STDC_H_
+
+/* Adapted from BSD /usr/include/sys/cdefs.h. */
+
+/* A function can be defined using prototypes and compile on both ANSI C
+   and traditional C compilers with something like this:
+	extern char *func PARAMS((char *, char *, int)); */
+
+#if !defined (PARAMS)
+#  if defined (__STDC__) || defined (__GNUC__) || defined (__cplusplus) || defined (PROTOTYPES)
+#    define PARAMS(protos) protos
+#  else 
+#    define PARAMS(protos) ()
+#  endif
+#endif
+
+/* Fortify, at least, has trouble with this definition */
+#if defined (HAVE_STRINGIZE)
+#  define CPP_STRING(x) #x
+#else
+#  define CPP_STRING(x) "x"
+#endif
+
+#if !defined (__STDC__)
+
+#if defined (__GNUC__)		/* gcc with -traditional */
+#  if !defined (signed)
+#    define signed __signed
+#  endif
+#  if !defined (volatile)
+#    define volatile __volatile
+#  endif
+#else /* !__GNUC__ */
+#  if !defined (inline)
+#    define inline
+#  endif
+#  if !defined (signed)
+#    define signed
+#  endif
+#  if !defined (volatile)
+#    define volatile
+#  endif
+#endif /* !__GNUC__ */
+
+#endif /* !__STDC__ */
+
+#ifndef __attribute__
+#  if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
+#    define __attribute__(x)
+#  endif
+#endif
+
+/* For those situations when gcc handles inlining a particular function but
+   other compilers complain. */
+#ifdef __GNUC__
+#  define INLINE inline
+#else
+#  define INLINE
+#endif
+
+#if defined (PREFER_STDARG)
+#  define SH_VA_START(va, arg)  va_start(va, arg)
+#else
+#  define SH_VA_START(va, arg)  va_start(va)
+#endif
+
+#endif /* !_STDC_H_ */