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# obstack-printf.m4
# serial 4
dnl Copyright (C) 2008-2025 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This file is offered as-is, without any warranty.
dnl From Eric Blake.
dnl Test whether obstack_printf() exists. For now, we assume that
dnl obstack_vprintf behaves identically, so we only test for one.
AC_DEFUN([gl_FUNC_OBSTACK_PRINTF],
[
dnl Persuade glibc <stdio.h> to declare obstack_printf(), obstack_vprintf().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
AC_CHECK_FUNCS_ONCE([obstack_printf])
if test $ac_cv_func_obstack_printf = no ; then
gl_REPLACE_OBSTACK_PRINTF
fi
gl_DECL_OBSTACK_PRINTF
])
AC_DEFUN([gl_REPLACE_OBSTACK_PRINTF],
[
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
if test $ac_cv_func_obstack_printf = yes; then
REPLACE_OBSTACK_PRINTF=1
fi
])
dnl Ensure obstack_printf() and obstack_vprintf() are declared
dnl (whether or not they are being replaced).
AC_DEFUN([gl_DECL_OBSTACK_PRINTF],
[
AC_CHECK_DECLS_ONCE([obstack_printf])
if test $ac_cv_have_decl_obstack_printf = no; then
HAVE_DECL_OBSTACK_PRINTF=0
fi
])
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