Add obstack-printf and obstack-printf-posix modules. * modules/obstack-printf: New file. * modules/obstack-printf-posix: Likewise. * MODULES.html.sh (Misc): Mention them. * doc/glibc-functions/obstack_printf.texi (obstack_printf): Likewise. * doc/glibc-functions/obstack_vprintf.texi (obstack_vprintf): Likewise. * modules/stdio (Makefile.am): Accomodate new modules. * m4/stdio_h.m4 (gl_STDIO_H_DEFAULTS): Likewise. * lib/stdio.in.h (rpl_obstack_printf, rpl_obstack_vprintf): Declare. * lib/obstack_printf.c (obstack_printf, obstack_vprintf): New functions. * m4/obstack-printf.m4 (gl_OBSTACK_PRINTF) (gl_REPLACE_OBSTACK_PRINTF): New macros * m4/obstack-printf-posix.m4 (gl_OBSTACK_PRINTF_POSIX): Likewise. * tests/test-obstack-printf.c: New file. * modules/obstack-printf-tests: Likewise. * modules/obstack-printf-posix-tests: Likewise. Signed-off-by: Eric Blake <ebb9@byu.net>

# serial 4
# Find valid warning flags for the C Compiler.           -*-Autoconf-*-

# Copyright (C) 2001, 2002, 2006 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# Written by Jesse Thilo.

AC_DEFUN([gl_WARNING_CFLAGS],
  [AC_MSG_CHECKING(whether compiler accepts $1)
   AC_SUBST(WARNING_CFLAGS)
   ac_save_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS $1"
   AC_TRY_COMPILE(,
    [int x;],
    WARNING_CFLAGS="$WARNING_CFLAGS $1"
    AC_MSG_RESULT(yes),
    AC_MSG_RESULT(no))
  CFLAGS="$ac_save_CFLAGS"
 ])