File aclocal/libconfig.m4 from the latest check-in

AC_DEFUN(DC_DO_WIN32, [
  AC_CHECK_HEADERS(windows.h windowsx.h)
])

AC_DEFUN(DC_DO_TYPE, [
	if test -z "$ac_cv_sizeof_long"; then
		AC_C_INLINE
		AC_CHECK_SIZEOF(long long, 8)
		AC_CHECK_SIZEOF(long, 4)
		AC_CHECK_SIZEOF(int, 4)
		AC_CHECK_SIZEOF(short, 2)
	fi
	FOUND=0
	for dc_cv_loop in \$ac_cv_sizeof_long_long \$ac_cv_sizeof_int \$ac_cv_sizeof_long \$ac_cv_sizeof_short; do
		dc_cv_size=`eval echo $dc_cv_loop`
		dc_cv_name=`echo $dc_cv_loop | sed s/\\\$ac_cv_sizeof_//`
		if test "$dc_cv_size" = "$3"; then
			if test "$dc_cv_name" = "int"; then 
				AC_CHECK_TYPE($1, $2 int)
			fi
			if test "$dc_cv_name" = "long"; then
				AC_CHECK_TYPE($1, $2 long)
			fi
			if test "$dc_cv_name" = "long_long"; then
				AC_CHECK_TYPE($1, $2 long long)
			fi
			if test "$dc_cv_name" = "short"; then
				AC_CHECK_TYPE($1, $2 short)
			fi
			FOUND=1
			break
		fi
	done
])

AC_DEFUN(DC_ASK_SMALL, [
	SMALL=0
	AC_ARG_ENABLE(small, AC_HELP_STRING([--enable-small], [Enable small build of libconfig. (disabled)]), [
		case $enableval in
			yes)            
				SMALL=1
				;;      
		esac    
	])

	if test $SMALL = 0; then
		dnl Use opennet if it's available AND not small
		DC_ASK_OPTLIB(opennet, fopen_net, opennet.h, [      Enable opennet support (auto)], libopennet, HAVE_LIBOPENNET, HAVE_OPENNET_H)
	else
		AC_DEFINE(ENABLE_SMALL, [1], [Define to 1 if you want to produce a minimalistic build.])
	fi
])