EX_CHECK_ALL(png, png_access_version_number, png.h, libpng, 1.2.5, http://prdownloads.sourceforge.net/libpng/)
EX_CHECK_ALL(freetype, FT_Init_FreeType, ft2build.h, freetype, 2.1.5, http://prdownloads.sourceforge.net/freetype/)
+dnl How the vertical axis label is printed
+AC_ARG_VAR(RRDGRAPH_YLEGEND_ANGLE,
+ [Vertical label angle: 90.0 (default) or 270.0])
+AC_DEFINE_UNQUOTED(RRDGRAPH_YLEGEND_ANGLE,${RRDGRAPH_YLEGEND_ANGLE:-90.0},
+ [Vertical label angle: 90.0 (default) or 270.0])
+
+
dnl Check for Perl.
AC_PATH_PROG(PERL, perl, no)
if test "x$PERL" = "xno"; then