Troubles with recent GD on Win32

[Hans-Bernhard B. <br...@ph...>]

Hi, everyone, 

looks like user just found a gnuplot build problem with the latest version
of GD used on Win32/MSVC++. The gdFontPtr variables for the 5 builtin
fonts of the gd library came back as undefined externals.  Looking into
this revealed the following:

1) gd.trm (and gif.trm, too...) contains our own private "extern" 
declarations rather than #include's of the corresponding headerfiles
provided by GD.  Does any of us see a reason we shouldn't just #include
those?

2) Tom Boutell added getter functions for those globals to his library,
specifically for the purpose of fixing problems of Win32 DLLs, but without
going into details about those problems.  Does this ring any bell to any
of us? Should we bother and patch gnuplot to use these (and introduce yet
another version check on GD for this)?  Or should we just put a note into
INSTALL that GD version 2.0.22 won't work with gnuplot?

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.