#
# SYNOPSIS
#
# NTP_FUNC_REALPATH
#
# DESCRIPTION
#
# This macro defines HAVE_FUNC_REALPATH if we have a realpath()
# function that accepts NULL as the 2nd argument.
#
# LICENSE
#
# Copyright (c) 2020 Network Time Foundation
#
# Author: Harlan Stenn <
[email protected]>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 1
AC_DEFUN([NTP_FUNC_REALPATH], [
AC_MSG_CHECKING([for a POSIX-2008 compliant realpath()])
AC_REQUIRE([AC_PROG_CC_C99])
AC_LANG_PUSH([C])
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <sys/param.h>
#include <stdlib.h>
int main() { return (NULL == realpath(".", NULL)); }
]])],
ans="yes",
ans="no",
ans="CROSS COMPILE!"
)
AC_MSG_RESULT([$ans])
case "$ans" in
yes)
AC_DEFINE([HAVE_FUNC_POSIX_REALPATH], [1],
[Define to 1 if we have realpath() that supports NULL as the 2nd argument])
;;
esac
AC_LANG_POP([C])
]);
