[Caml-list] Building camlimages programs on deb (and linux)

[Caml-list] Building camlimages programs on deb (and linux)

[chris.danx]

Hi,

I'm in the process of making a script to build programs with camlimages
easier but have hit a snag linking... the output is

Error on dynamically loaded library: /usr/X11R6/lib/libXpm.so.4:
undefined symbol: XDefaultScreen

Does anyone else get this problem?

ocamlc `camlimages-config` monochrome.ml -cclib "-L/usr/X11R6/lib -lXpm
-lpng -lfreetype -lz -ljpeg -gif"


camlimages-config is simply

#!/bin/sh

LIBDIR=/usr/lib/ocaml/3.07/camlimages

echo -I $LIBDIR ci_core.cma ci_gif.cma ci_jpeg.cma ci_tiff.cma
ci_xpm.cma ci_bmp.cma ci_ppm.cma ci_png.cma ci_ps.cma ci_xvthumb.cma


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Re: [Caml-list] Building camlimages programs on deb (and linux)

[Issac Trotts]

On Mon, Nov 24, 2003 at 12:27:37AM +0000, chris.danx wrote:
> Hi,
> 
> I'm in the process of making a script to build programs with camlimages
> easier but have hit a snag linking... the output is
> 
> Error on dynamically loaded library: /usr/X11R6/lib/libXpm.so.4:
> undefined symbol: XDefaultScreen

$ grep XDefaultScreen /usr/X11R6/lib/*
Binary file /usr/X11R6/lib/libX11.a matches
Binary file /usr/X11R6/lib/libX11.so matches
Binary file /usr/X11R6/lib/libX11.so.6 matches
Binary file /usr/X11R6/lib/libX11.so.6.2 matches
Binary file /usr/X11R6/lib/libXpm.a matches
Binary file /usr/X11R6/lib/libXpm.so matches
Binary file /usr/X11R6/lib/libXpm.so.4 matches
Binary file /usr/X11R6/lib/libXpm.so.4.11 matches

so maybe it will work if you include -lX11 in your link line.

ocamlc `camlimages-config` monochrome.ml -cclib "-L/usr/X11R6/lib 
  -lX11 -lXpm -lpng -lfreetype -lz -ljpeg -gif"

> 
> Does anyone else get this problem?
> 
> ocamlc `camlimages-config` monochrome.ml -cclib "-L/usr/X11R6/lib -lXpm
> -lpng -lfreetype -lz -ljpeg -gif"
> 
> 
> camlimages-config is simply
> 
> #!/bin/sh
> 
> LIBDIR=/usr/lib/ocaml/3.07/camlimages
> 
> echo -I $LIBDIR ci_core.cma ci_gif.cma ci_jpeg.cma ci_tiff.cma
> ci_xpm.cma ci_bmp.cma ci_ppm.cma ci_png.cma ci_ps.cma ci_xvthumb.cma
> 
> 
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-- 
Issac Trotts

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Re: [Caml-list] Building camlimages programs on deb (and linux)

[chris.danx]

Issac Trotts wrote:

> $ grep XDefaultScreen /usr/X11R6/lib/*
> Binary file /usr/X11R6/lib/libX11.a matches
> Binary file /usr/X11R6/lib/libX11.so matches
> Binary file /usr/X11R6/lib/libX11.so.6 matches
> Binary file /usr/X11R6/lib/libX11.so.6.2 matches
> Binary file /usr/X11R6/lib/libXpm.a matches
> Binary file /usr/X11R6/lib/libXpm.so matches
> Binary file /usr/X11R6/lib/libXpm.so.4 matches
> Binary file /usr/X11R6/lib/libXpm.so.4.11 matches
> 
> so maybe it will work if you include -lX11 in your link line.

I tried your suggestion, but it didn't work. :(

It's defined in Xlib.h, so I included Xlib in the link options, but it 
didn't complete the link (same error).

ocamlc `camlimages-config` -cclib "-L/usr/X11R6/lib -L/usr/X11R6/lib/X11 
-lX11 -lXlib -lxvthumb -lXpm -lpng -lfreetype -lz -ljpeg -lgif" 
monochrome.ml

Wonder if the lib is mangled?  I'll do an update to see...


Cheers,
Chris

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Re: [Caml-list] Building camlimages programs on deb (and linux)

[Matt Gushee]

On Mon, Nov 24, 2003 at 05:34:41PM +0000, chris.danx wrote:

[ ... about troubles compiling CamlImages ... ]

I'm afraid I can't help with CamlImages, but a possible alternative is
GD4O, which is a wrapper for the GD graphics library. Since you haven't
stated your plans very specifically, it's hard to say if it will do what
you need. also, the OCaml wrapper is incomplete and I consider it to be
alpha-quality code; but when it is finished, it will be a complete
implementation of the GD API, providing a very nice set of drawing
functions and a modest set of transformation functions.

The GD API is described at:

  http://www.boutell.com/gd/manual2.0.15.html

And the following document describes which functions are currently
implemented in GD4O:

  http://havenrock.com/software/gd4o/doc/api-xref.html

You will notice that none of the copying and resizing functions are
implemented yet, but--since they happen to be quite simple to code, and
I happen to have a little time today--I'm just going to go ahead and
implement them right now. And even if you're not interested, I don't
mind: they need to be done sooner or later anyway.

Feel free to get in touch if you have questions.

-- 
Matt Gushee                 When a nation follows the Way,
Englewood, Colorado, USA    Horses bear manure through
mgushee@havenrock.com           its fields;
http://www.havenrock.com/   When a nation ignores the Way,
                            Horses bear soldiers through
                                its streets.
                                
                            --Lao Tzu (Peter Merel, trans.)

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Re: [Caml-list] Building camlimages programs on deb (and linux)

[chris.danx]

Matt Gushee wrote:
> 
> I'm afraid I can't help with CamlImages, but a possible alternative is
> GD4O, which is a wrapper for the GD graphics library. Since you haven't
> stated your plans very specifically, it's hard to say if it will do what
> you need. also, the OCaml wrapper is incomplete and I consider it to be
> alpha-quality code; but when it is finished, it will be a complete
> implementation of the GD API, providing a very nice set of drawing
> functions and a modest set of transformation functions.

Thanks for the pointer.  My intentions are twofold, first I want to load 
textures in different formats to use with OpenGL (png and jpeg 
specifically).  I also want to develop an image processing program.  I 
started doing it in Ada, but got fed up having to bind to libjpeg, 
libpng, ... write bmp loading code, etc.  I probably would've went on 
with it in Ada, but I wanted to use a functional language for something 
sizeable.


Chris


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Re: [Caml-list] Building camlimages programs on deb (and linux)

[chris.danx]

Gurr, David (MED, self) wrote:
> Unix linkers can be very "helpful".  Forgive me if you
> already know this but the link order is important. 

No I didn't know what, thanks.


> The dependant lib comes before the lib that it depends on.
> And if you have circular dependencies you will need to
> link a lib multiple times.  So:
> 
>>ocamlc `camlimages-config` -cclib "-L/usr/X11R6/lib 
>> -lxvthumb -lXpm -lX11 -lpng -lfreetype -lz -ljpeg -lgif" 
>>monochrome.ml

Just tried that... :(

I updated my system, if there is a bug in Xpm it hasn't been fixed (some 
how I doubt it's a bug - it's more likely me doing something daft).

Interestingly if I take the program off it still complains...

ocamlc `camlimages-config` -cclib "-L/usr/X11R6/lib -lxvthumb -lXpm 
-lX11 -lpng -lfreetype -lz -ljpeg -lgif"

So I guess that it comes from linking with the ocaml files specified in 
camlimages-config with the libraries...

-I /usr/lib/ocaml/3.07/camlimages ci_core.cma ci_gif.cma ci_jpeg.cma 
ci_tiff.cma ci_bmp.cma ci_ppm.cma ci_png.cma ci_ps.cma ci_xpm.cma


If i leave ci_xpm.cma off, it links.  I don't know if it's safe to leave 
it off.  I suppose if I don't use XPM it'll be ok, but it's not the 
greatest solution.



Chris

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Re: [Caml-list] Building camlimages programs on deb (and linux)

[Jun.Furuse]

Hello,
 
> ocamlc `camlimages-config` -cclib "-L/usr/X11R6/lib -lxvthumb -lXpm 
> -lX11 -lpng -lfreetype -lz -ljpeg -lgif"

Duh, I cannot tell what is wrong. Even we, the authors, do not know
about the script "camlimages-config". It is not from  the official
camlimages distribution. (I guess it comes from Debian package, which
is out of my control.) 

I always use $(CAMLIMAGESLIBS) defined inside
/usr/local/lib/ocaml/camlimages/Makefile.config for linking the
camlimages to my programs. It should list all the libraries required.

BTW, it sounds still strange that you fail to link even with -lX11.
Please send me what happens (including error messages) if you execute
the following:

	ocamlc -custom -verbose `camlimages-config` 
	-cclib "-L/usr/X11R6/lib -lxvthumb -lXpm 
	-lX11 -lpng -lfreetype -lz -ljpeg -lgif"

> If i leave ci_xpm.cma off, it links.  I don't know if it's safe to leave 
> it off.  I suppose if I don't use XPM it'll be ok, but it's not the 
> greatest solution.

Camlimages libraries are separated into pieces so that you can link
the libraries you really want. If you are not interested to read/write
xpm images in your program, you need not to link ci_xpm.cma.

Anyway, you found a bug of camlimages. Usually Xpm requires X11, but I
forgot to link it. I will fix the problem.

--
Jun

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Re: [Caml-list] Building camlimages programs on deb (and linux)

[chris.danx]

Jun.Furuse@inria.fr wrote:
> Hello,

Hi

> Duh, I cannot tell what is wrong. Even we, the authors, do not know
> about the script "camlimages-config". It is not from  the official
> camlimages distribution. (I guess it comes from Debian package, which
> is out of my control.) 

It doesn't come with debian (i wrote it), it simply echoes

-I /usr/lib/ocaml/3.07/camlimages ci_core.cma ci_gif.cma ci_jpeg.cma 
ci_tiff.cma ci_bmp.cma ci_ppm.cma ci_png.cma ci_ps.cma ci_xpm.cma

as in

#!/bin/sh
LIBDIR=/usr/lib/ocaml/3.07/camlimages

echo -I $LIBDIR ci_core.cma ci_gif.cma ci_jpeg.cma ci_tiff.cma 
ci_bmp.cma ci_ppm.cma ci_png.cma ci_ps.cma ci_xpm.cma



> I always use $(CAMLIMAGESLIBS) defined inside
> /usr/local/lib/ocaml/camlimages/Makefile.config for linking the
> camlimages to my programs. It should list all the libraries required.
> 
> BTW, it sounds still strange that you fail to link even with -lX11.
> Please send me what happens (including error messages) if you execute
> the following:
> 
> 	ocamlc -custom -verbose `camlimages-config` 
> 	-cclib "-L/usr/X11R6/lib -lxvthumb -lXpm 
> 	-lX11 -lpng -lfreetype -lz -ljpeg -lgif"

It fails on xvthumb, but if I take that out it links ok. :?

ocamlc -custom -verbose `camlimages-config` -cclib "-L/usr/X11R6/lib 
-lXpm -lX11 -lpng -lfreetype -ljpeg -lgif" monochrome.ml
+ gcc -Wl,-E -o 'a.out' -I'/usr/lib/ocaml/3.07' -L/usr/X11R6/lib 
-Wl,-rpath,/usr/X11R6/lib /tmp/camlprim88d632.c 
'-L/usr/lib/ocaml/3.07/camlimages' '-L/usr/lib/ocaml/3.07' '-lci_xpm' 
'-lXpm' '-lci_png' '-lpng' '-lz' '-lci_tiff' '-ltiff' '-lci_jpeg' 
'-ljpeg' '-lci_gif' '-lgif' '-L/usr/X11R6/lib' '-lXpm' '-lX11' '-lpng' 
'-lfreetype' '-ljpeg' '-lgif' -lcamlrun -lm  -ldl -lcurses -lpthread

with -lxvthumb, it gives an error saying it can't find the lib (it's not 
on the system).

Also if -custom is removed it fails.

> Camlimages libraries are separated into pieces so that you can link
> the libraries you really want. If you are not interested to read/write
> xpm images in your program, you need not to link ci_xpm.cma.

Yeah I know.  It's just that if I wanted to read xpm images, I'd have 
had a problem.


Thanks,
Chris

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Re: [Caml-list] Building camlimages programs on deb (and linux)

[Jun.Furuse]

> > BTW, it sounds still strange that you fail to link even with -lX11.
> > Please send me what happens (including error messages) if you execute
> > the following:
> > 
> > 	ocamlc -custom -verbose `camlimages-config` 
> > 	-cclib "-L/usr/X11R6/lib -lxvthumb -lXpm 
> > 	-lX11 -lpng -lfreetype -lz -ljpeg -lgif"
> 
> It fails on xvthumb, but if I take that out it links ok. :?

Oops, sorry. You are correct. There is no libxvthumb.
 
> ocamlc -custom -verbose `camlimages-config` -cclib "-L/usr/X11R6/lib 
> -lXpm -lX11 -lpng -lfreetype -ljpeg -lgif" monochrome.ml
> + gcc -Wl,-E -o 'a.out' -I'/usr/lib/ocaml/3.07' -L/usr/X11R6/lib 
> -Wl,-rpath,/usr/X11R6/lib /tmp/camlprim88d632.c 
> '-L/usr/lib/ocaml/3.07/camlimages' '-L/usr/lib/ocaml/3.07' '-lci_xpm' 
> '-lXpm' '-lci_png' '-lpng' '-lz' '-lci_tiff' '-ltiff' '-lci_jpeg' 
> '-ljpeg' '-lci_gif' '-lgif' '-L/usr/X11R6/lib' '-lXpm' '-lX11' '-lpng' 
> '-lfreetype' '-ljpeg' '-lgif' -lcamlrun -lm  -ldl -lcurses -lpthread

Everyhing seems to be ok.
 
> Also if -custom is removed it fails.

Yes, it also happens in my system, too. This is due to a bug that 
the dynlink options of ci_xpm.cma lack -lX11. I did not notice
this bug since I always linked ci_xpm.cma with ci_graphics.cma
together, which links -lX11. I will fix this soon.

--
Jun

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