Re: Guile-CV: Not a GRAY, RGB nor an RGBA image "sand.tif"

[David Pirotte <david@altosw.be>]

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Hi Daniele,

	this is a long answer, please read carefully, and apply all the steps
	meticulously...

> >         Did you install Vigra 'manually?
> >         What is the version of Vigra?

You forgot to answer the above question, but I believe, because of the (incomplete)
'ldd libvigra_c.so' report you sent, that you installed Vigra manually, which is
perfect (and expected): debian buster still uses 1.10, and Guile-CV needs Vigra 1.11
(to be fully correct, the libvigra_c upon which Guile-CV depends needs Vigra 1.11):

	It is also a lot better in the long run, debian, even buster, is far too
	slow 'for us', as you can see (Vigra 1.11 has been released a while ago...).

However, when you install Vigra manually, you are responsible for the installation
of the image format libraries you intend to use, and you are missing practically all
of them, let's fix this, see below.

> >         What is the last commit of vigra_c on your side? (just go in the
> > directory where you cloned, run gilt log and grab the first line for me).  
> 
> commit 691b189b05b0e0734376510cbdb256d30725ec96 (HEAD -> master,
> origin/master, origin/HEAD)

Perfect.

> > David  

	as an aside note, please configure your email so it does not wrap long lines
	so you can copy paste 'terminal output', and manually ask for wrapping text
	lines,,, thanks!

>     linux-vdso.so.1 (0x00007fffaefc0000)
>     libvigraimpex.so.11 => /usr/local/lib/libvigraimpex.so.11
> ...

This is largely incomplete.  Let's 'trick' to solve this and try to save some time
as well, please try the following:

	1-	install libvigraimpex-dev

			sudo apt-get install libvigraimpex-dev

		this will install all Vigra dependencies as specified by the debian
		team: it will install all image libraries development files for all
		image format Vigra is capable of handling

	2-	recompile Vigra

		cd /your-vigra-source-tree-location/
		make clean
		cmake \
		      -DCMAKE_INSTALL_PREFIX=/opt/vigra \
		      -DCMAKE_BUILD_TYPE=RELEASE

			[ in the above steps, substitute the PREFIX as
			[ appropriate ... I suggest you keep the one you had to
			[ simplify (otherwise remember to (re)configure
			[ in /etc/ld.so.conf.d//vigra.conf  and run ldconfig as
			[ root ...

			at this point, cmake will list all format it will accept, so
			you can double check ...

		make
		make install

	3- recompile libvigra_c

		make clean
		cmake \
		      -DCMAKE_INSTALL_PREFIX=/opt/vigra_c \
		      -DCMAKE_BUILD_TYPE=RELEASE

			[ in the above steps, substitute the PREFIX for the
			[ one used above ...  remember to (re)configure
			[ in /etc/ld.so.conf.d//vigra_c.conf  and run ldconfig as
			[ root ...

		make
		make install

	4-	you may safely remove libvigraimpex-dev if you wish, we are not
		using it anyway...

Then try make check in Guile-CV, then make install, and ... it should be fine.

David

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