OS X and camlimages

OS X and camlimages

[Christophe Raffalli]

* I failed to compile cleanly camlimages on OS X (with fink) (I had to add -L/
sw/lib and -I/sw/include at the proper places ...

* By the way, do you know if and what part of camlimages can be compiled on 
OS X without any fink library.

Finally, when linking with GlSurf, I got the following problem which tend to 
prove that libpng is already in the standard OS X library (but I could not find 
the headers, may be I am missing some SDK in xcode):


ocamlopt  -o glsurf functionstubs.o -labels -I +lablGL -I +threads -I 
+camlimages -pp "camlp4o pa_macro.cmo -DOSX" -ccopt "-g" -cclib 
-bind_at_load -thread nums.cmxa unix.cmxa threads.cmxa lablglut.cmxa 
lablgl.cmxa ci_core.cmxa ci_bmp.cmxa ci_gif.cmxa ci_jpeg.cmxa 
ci_ppm.cmxa ci_ps.cmxa ci_xpm.cmxa ci_tiff.cmxa ci_png.cmxa -cclib -L/
sw/lib -cclib -L/usr/X11R6/lib -cclib -lobjc -ccopt "-framework openGL" 
-ccopt "-framework GLUT" glchar.cmx dirty.cmx input_util.cmx algebra.cmx 
expression.cmx vector.cmx optimisation.cmx vect3.cmx target.cmx 
parameters.cmx function.cmx glarrays.cmx triangulation_tools.cmx 
draw.cmx pivot.cmx marching_cube.cmx curve.cmx action.cmx inflate.cmx 
parser.cmx main.cmx

ld: warning multiple definitions of symbol _png_get_uint_31
/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit(single 
module) definition of _png_get_uint_31
/sw/lib/libpng.dylib(pngrutil.pic.o) definition of _png_get_uint_31

Re: [Caml-list] OS X and camlimages

[Daniel Bünzli]

Le 6 déc. 04, à 22:57, Christophe Raffalli a écrit :


> * I failed to compile cleanly camlimages on OS X (with fink) (I had to 
> add -L/
> sw/lib and -I/sw/include at the proper places ...

Maybe this should be documented in the INSTALL file :

 > ./configure --help
[...]
Some influential environment variables:
   CC          C compiler command
   CFLAGS      C compiler flags
   LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
               nonstandard directory <lib dir>
   CPPFLAGS    C/C++ preprocessor flags, e.g. -I<include dir> if you have
               headers in a nonstandard directory <include dir>
   CPP         C preprocessor



> * By the way, do you know if and what part of camlimages can be 
> compiled on
> OS X without any fink library.

Here, with X11 and ghostscript installed, configure ends with :

External libraries: lablgl bmp ppm xpm freetype(2) ps

So I think that if you have a standard installation (which does _not_ 
include X11 by default) then you get only the minimum listed in the 
INSTALL files, that is BMP, PPM, PGM, PBM.

> Finally, when linking with GlSurf, I got the following problem which 
> tend to
> prove that libpng is already in the standard OS X library (but I could 
> not find
> the headers, may be I am missing some SDK in xcode):
[...]

> ld: warning multiple definitions of symbol _png_get_uint_31
> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit(single
> module) definition of _png_get_uint_31
> /sw/lib/libpng.dylib(pngrutil.pic.o) definition of _png_get_uint_31

I don't think libpng is present on the system, it is not in /usr/lib. 
And if you look at
the output of

 > otool -L /System/Library/Frameworks/AppKit.framework/AppKit

you will see that the AppKit is not dynamically linked against any 
libpng. If you grep for 'png' in the output of

 > nm /System/Library/Frameworks/AppKit.framework/AppKit

you'll see the symbols of png's api so it must be statically linked in 
the Appkit.

Greetings,

Daniel

P.S. More about that warning in man ld

Re: [Caml-list] OS X and camlimages

[Christophe Raffalli]

[-- Attachment #1: Type: text/plain, Size: 2567 bytes --]

Daniel Bünzli wrote:
> 
> Le 6 déc. 04, à 22:57, Christophe Raffalli a écrit :
> 
> 
>> * I failed to compile cleanly camlimages on OS X (with fink) (I had to 
>> add -L/
>> sw/lib and -I/sw/include at the proper places ...
> 
> 
> Maybe this should be documented in the INSTALL file :
> 
>  > ./configure --help
> [...]
> Some influential environment variables:
>   CC          C compiler command
>   CFLAGS      C compiler flags
>   LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
>               nonstandard directory <lib dir>
>   CPPFLAGS    C/C++ preprocessor flags, e.g. -I<include dir> if you have
>               headers in a nonstandard directory <include dir>
>   CPP         C preprocessor
> 
> 
Thanks.


>> * By the way, do you know if and what part of camlimages can be 
>> compiled on
>> OS X without any fink library.
> 
> 
> Here, with X11 and ghostscript installed, configure ends with :
> 
> External libraries: lablgl bmp ppm xpm freetype(2) ps

So you say no way to have png, tiff jpeg in standrad apple SDK ?

>> ld: warning multiple definitions of symbol _png_get_uint_31
>> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit(single
>> module) definition of _png_get_uint_31
>> /sw/lib/libpng.dylib(pngrutil.pic.o) definition of _png_get_uint_31
> 
> 
> I don't think libpng is present on the system, it is not in /usr/lib. 
> And if you look at
> the output of
> 
>  > otool -L /System/Library/Frameworks/AppKit.framework/AppKit
> 
> you will see that the AppKit is not dynamically linked against any 
> libpng. If you grep for 'png' in the output of
> 
>  > nm /System/Library/Frameworks/AppKit.framework/AppKit

I did all that, but still there seems to be a name collison between 
AppKit and libpng, while no png is listed in the header.

> you'll see the symbols of png's api so it must be statically linked in 
> the Appkit.

If true, that's a pity.

> Greetings,
> 
> Daniel
> 
> P.S. More about that warning in man ld
> 

You mean a way to choose which one you want to use ? I will have a look. 
Thanks.

-- 
Christophe Raffalli
Université de Savoie
Batiment Le Chablais, bureau 21
73376 Le Bourget-du-Lac Cedex

tél: (33) 4 79 75 81 03
fax: (33) 4 79 75 87 42
mail: Christophe.Raffalli@univ-savoie.fr
www: http://www.lama.univ-savoie.fr/~RAFFALLI
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