[tlbuild] Building luatex with poppler

[Taco Hoekwater]

Norbert Preining wrote:
> 
> Now two things:
> 1) is there any chance to make that even simpler? I mean if one selects
>    --with-poppler we would only have to change the value of
> 	XPDF_LIBS to -lpoppler
>    and
> 	XPDF_DEPEND to nothing
>    (because poppler would be always system wide)
>    and
> 	XPDF_INCLUDES to something given with --with-poppler-include
>    Whether the need_xpdf is set to true/false I do not know if it makes 
>    any difference.

This is beyond my knowledge of autoconf.

> 2) Concerning system libpng: Most things work out of the box if one
>    gives
> 	--with-system-png
>    but in source/texk/web2c/luatexdir/image/image.h there is a
> 	#  include <../libpng/png.h>
>    which has to be changed to
> 	#  include <png.h>
>    Taco, any chance to fix that in one or the other way?

Changed in commit #12735

Best wishes,
Taco