dot from graphviz (2.42.3) doesn't work

[roalyr]

I am not sure at which update things changed, but running
cargo deps --all-deps | dot -Tpng > "dep_graph.png"
which always worked as expected, now throws up:
Format: "png" not recognized. Use one of:

...And it doesn't state any possible image formats.
Graphviz version is 2.42.3, deps as follows:

graphviz
  Depends: libandroid-glob
  Depends: libc++
  Depends: libcairo
  Depends: pango
  Depends: libexpat
  Depends: libltdl
  Depends: librsvg
  Depends: libgd
  Depends: zlib
  Breaks: <graphviz-dev>
  Replaces: <graphviz-dev>```

[Grimler91]

I am getting the same behaviour when compiling on device, so it is not cross-compilation specific..

[yubrajbhoi]

@roalyr It's because dot -c is generating an empty $PREFIX/lib/graphviz/config6 file. So I downgraded to the older version of graphviz and the older config6 (with some changes) works with the new version.

Here is mine:

# This file was generated by "dot -c" at time of install.

# You may temporarily disable a plugin by removing or commenting out
# a line in this file, or you can modify its "quality" value to affect
# default plugin selection.

# Manual edits to this file **will be lost** on upgrade.

libgvplugin_core.so core {
	device {
		dot:dot 1
		gv:dot 1
		canon:dot 1
		plain:dot 1
		plain-ext:dot 1
		xdot:xdot 1
		xdot1.2:xdot 1
		xdot1.4:xdot 1
	}
	device {
		fig:fig 1
	}
	device {
		ismap:map 1
		cmap:map 1
		imap:map 1
		cmapx:map 1
		imap_np:map 1
		cmapx_np:map 1
	}
	device {
		ps:ps 1
		ps2:ps 1
		eps:ps 1
	}
	device {
		svg:svg 1
		svgz:svg 1
	}
	device {
		tk:tk 1
	}
	device {
		vml:vml 1
		vmlz:vml 1
	}
	device {
		pic:pic -1
	}
	device {
		pov:pov 1
	}
	render {
		dot 1
		xdot 1
	}
	render {
		fig 1
	}
	render {
		map 1
	}
	render {
		ps 1
	}
	render {
		svg 1
	}
	render {
		tk 1
	}
	render {
		vml 1
	}
	render {
		pic -1
	}
	render {
		pov 1
	}
	loadimage {
		png:svg 1
		gif:svg 1
		jpeg:svg 1
		jpe:svg 1
		jpg:svg 1
		png:fig 1
		gif:fig 1
		jpeg:fig 1
		jpe:fig 1
		jpg:fig 1
		png:vrml 1
		gif:vrml 1
		jpeg:vrml 1
		jpe:vrml 1
		jpg:vrml 1
		eps:ps 1
		ps:ps 1
		(lib):ps 1
		png:map 1
		gif:map 1
		jpeg:map 1
		jpe:map 1
		jpg:map 1
		ps:map 1
		eps:map 1
		svg:map 1
		png:dot 1
		gif:dot 1
		jpeg:dot 1
		jpe:dot 1
		jpg:dot 1
		ps:dot 1
		eps:dot 1
		svg:dot 1
		png:xdot 1
		gif:xdot 1
		jpeg:xdot 1
		jpe:xdot 1
		jpg:xdot 1
		ps:xdot 1
		eps:xdot 1
		svg:xdot 1
		svg:svg 1
		png:vml 1
		gif:vml 1
		jpeg:vml 1
		jpe:vml 1
		jpg:vml 1
		gif:tk 1
	}
}
libgvplugin_dot_layout.so dot_layout {
	layout {
		dot 0
	}
}
libgvplugin_gd.so gd {
	render {
		gd 1
	}
	render {
		vrml 1
	}
	textlayout {
		textlayout 2
	}
	loadimage {
		gd:gd 1
		gd2:gd 1
		gif:gd 1
		jpeg:gd 1
		jpe:gd 1
		jpg:gd 1
		png:gd 1
		gd:ps 1
#FAILS		gd:lasi 1
		gd2:ps 1
#FAILS		gd2:lasi 1
		gif:ps 1
#FAILS		gif:lasi 1
		jpeg:ps 1
		jpg:ps 1
		jpe:ps 1
#FAILS		jpeg:lasi 1
#FAILS		jpg:lasi 1
#FAILS		jpe:lasi 1
		png:ps 1
#FAILS		png:lasi 1
		gd:cairo 1
		gd2:cairo 1
		gif:cairo 1
		jpeg:cairo 1
		jpg:cairo 1
		jpe:cairo 1
		png:cairo -1
	}
	device {
		gif:cairo 10
		wbmp:cairo 5
		jpe:cairo 5
		jpeg:cairo 5
		jpg:cairo 5
		png:cairo 5
		gd:cairo 5
		gd2:cairo 5
	}
	device {
		gif:gd 1
		wbmp:gd 1
		jpe:gd 1
		jpeg:gd 1
		jpg:gd 1
		png:gd 1
		gd:gd 1
		gd2:gd 1
	}
	device {
		vrml:vrml 1
	}
}
libgvplugin_gdiplus.so gdiplus {
	render {
		gdiplus 1
	}
	textlayout {
		textlayout 8
	}
	loadimage {
		bmp:gdiplus 8
		gif:gdiplus 8
		jpe:gdiplus 8
		jpeg:gdiplus 8
		jpg:gdiplus 8
		png:gdiplus 8
	}
	device {
		metafile:gdiplus 8
		bmp:gdiplus 8
		emf:gdiplus 8
		emfplus:gdiplus 8
		gif:gdiplus 8
		jpe:gdiplus 8
		jpeg:gdiplus 8
		jpg:gdiplus 8
		png:gdiplus 8
		tif:gdiplus 8
		tiff:gdiplus 8
	}
	device {
		bmp:cairo 8
		gif:cairo 8
		jpe:cairo 8
		jpeg:cairo 8
		jpg:cairo 8
		png:cairo 8
		tif:cairo 8
		tiff:cairo 8
	}
}
libgvplugin_neato_layout.so neato_layout {
	layout {
		neato 0
		fdp 0
		sfdp 0
		twopi 0
		circo 0
		patchwork 0
		osage 0
		nop 0
		nop1 0
		nop2 0
	}
}
libgvplugin_pango.so cairo {
	render {
		cairo 10
	}
	textlayout {
		textlayout 10
	}
	loadimage {
		png:cairo 1
#FAILS		png:lasi 2
		png:ps 2
	}
	device {
		png:cairo 10
		ps:cairo -10
		pdf:cairo 10
		svg:cairo -10
	}
}

[Grimler91]

@yubrajbhoi thanks, apparently graphviz looks for $PREFIX/lib/graphviz/libgvplugin_*.so.6, but our libraries are without the version number. Fixed in 693d221, though I didn't investigate enough to find a proper fix.