[Gnash-dev] Cross-compiling / configure dependency checks

[Hannes Mayr]

Hello guys,

as Udo already mentioned in the other thread we were able to 
cross-compile Gnash and to let it run on our embedded board (looks 
promising :).
However, it was not possible to cross-compile the source out of the box 
and I had to modify configure (and macros) a bit. The main problem is 
that configure always checks - independend if the dependency is used or 
not - for a dependency and includes it into the Makefile if it gets 
found. This is especially a problem when doing cross-compiling as it 
finds and uses x86 libraries from the host pc.

I'm not an expert of autconf, so I don't know whats the normal way in 
this case, but maybe it could be a solution to include in every macro a 
switch (--enable-PKG=no) to disable the check. This is already done in 
opengl.m4, but is not available in others.
Another point might be to only check for libraries/headers which are 
really used and to make the checks dependend from the choosen renderer 
and gui (why check for X11,SDL,GTK2,KDE/QT if the user has choosen AGG 
as renderer and framebuffer as GUI?).

BTW: I found a typo in jpeg.m4, line 99:
ac_cv_path_jpeg_lib=`(cd ${with_jpeg_incl}; pwd)`
should be
ac_cv_path_jpeg_lib=`(cd ${with_jpeg_lib}; pwd)`


Hannes