Re: [Gnash-dev] Incorrect message when AGG is old...

[Alfred M. Szmidt]

   s> Anyway, still interested in attempts to bild with an older AGG
   s> ...

   As long as the particular 2.4 version contains the
   render_scanlines_compound_layered template/class (normally defined
   in agg_renderer_scanline.h) the AGG version should be OK, so you
   could check for that if that's possible.

   Not sure if the compatibility layer is still worth it since 2.5 is
   now the current version.

It should be very trivial to do such a check:

AC_LANG([C++])
AC_CHECK_LIB([some_crucial_function_in_libagg], [libagg], [],
  AC_MSG_ERROR([you are missing libagg, please install it]))
AC_CHECK_FUNC([render_scanlines_compound_layered], [],
  AC_MSG_ERROR([you are using a version of libagg that does not work with 
gnash]))

I don't know if this will work with C++'s template system though.