[FIXED] - Use GLPng from Os4depot.net

Hi All,

I try to use GLPNG available here :
http://www.os4depot.net/index.php?fun ... ibrary/graphics/glpng.lha

without success.

If I try to compile to pnglib, I get an error message saying that there are no rule for makefile.

When I try to include files I get many error messages...

Does someone already use it ?

Thanks
Fred

@freddix

Maybe i am wrong, but somebody on #amigadev said before that is very buggy. But it was usable (at least you can compile programms with using of it).

I've added -LIBGLPNG in the makefile.
It compiles but gives error saying that in GLPng.c, there are "undefined reference" like "png_read_end" .. "png_destroy_read_struct" ...

@freddix

When linking with static libraries you need to list all dependencies (including those needed by the library in question).

Since libglpng seems to require libpng you should link your program with (libpng uses libz):

-lglpng -lpng -lz

Note that the order and placing is important. Static libraries that use other static libraries should be placed to the left of the libraries that they use on the commandline and to the right of any files from which they are used.

@salass00
Hi and thank you, it now compiles without error :)
Using : -lglpng -lz


Is there any naming convention ? information ? that can help knowing the name used for the lib when including it in the makefile script ?

Regards,
Fred

@freddix

just look up the name of the static lib.
libblah.a becomes -lblah
the libs are in sdk:local/newlib/lib and sdk:local/clib2/lib

@spotUP
Ok
Thanks

@Salass00:
I used what you said : -lglpng -lpng -lz

It compiles but when I try to use pngLoad function, the program crash ... Do you have any clue ?

EDIT:
Does the libglpng.a provided in the archive is the correct one for Amiga OS 4 ? or should I compile it ?
(cos I can't compile it it tell me that there are no rule to compile for makefile)

EDIT:
I have fixed it :) PNG support now work perfectly on AmiDARK Engine :)