[Digikam-devel] Compile problems png library

[Gilles Caulier]

ok PngMetaLoader can be normally compiled into debian now. raw Exif/IPTC 
profiles extraction is broken temporally. I will use a new method to do it...

Gerhard, please checkout svn and let's me hear if you can compile digiKam...

Gilles

Le Lundi 20 Mars 2006 07:20, Gerhard Kulzer a écrit :
> Hi Gilles and Aschwin,
> I'm still struggling with the png lib. In the png-mng-implementation ML I
> found a discussion string about how Debian goes about the png
> implementation. But having analyzed a bit the differences between Debian
> source and sourceforge.net I don't think it's the Debian implementation. It
> seems to me (with my restricted understanding of things) that the missing
> functions are private now:
>         png_read_data
>         png_crc_finish
>         png_get_uint_32
>         png_reset_crc
>         png_crc_read
>         png_read_transform_info
>         png_write_data
>
>  They are not exported into the symfile anymore. I don't know when this
> change happened, but somewhere along 1.2.8 version.
> Gilles, what version exactly do you have on your Mandriva? I have
> 1.2.8-rel5
>
> Gerhard
>
> On Friday 17 March 2006 15:56, you wrote:
> > Hi again!
> > A few minutes later, I found out that the symbols are present in the
> > static library (/usr/lib/libpng12.a), but many of them are not in the
> > dynamic library (/usr/lib/libpng12.so.0.1.2.8).
> >
> > I consider this to be a bug in the debian vesion of libpng and I am
> > considering to report this to the debian bug tracker. Tonight, I will
> > try to compile a version of libpng on myself, to check for that.
> >
> > Greetings,
> >
> > Aschwin
> >
> > Gerhard Kulzer schrieb:
> > > On Friday 17 March 2006 12:21, you wrote:
> > >>Hi Gerhard,
> > >>I read your posts in the digkam devel mailing list regarding your
> > >>compile problems with recent svn on debian. I have the same problem and
> > >>I am somewhat lost (which is strange). Did you find the cause of the
> > >>problem? It seems the libpng in debian is not correct, but it looks
> > >> good...
> > >>
> > >>Strange...
> > >>
> > >>Regards
> > >>
> > >>Aschwin
> > >>
> > >>Aschwin Gopalan
> > >
> > > No, unfortunately I didn't find any solution yet and I'm more or less
> > > at the end of my wits. I changed all Makefiles to link with -lpng -lz
> > > -lm and with -lpng12 as requested by libpng12-config (but I don't
> > > believe the -lpng12 is necessary, libpng it probably backwards
> > > comptible). I also created a link libpng.so.3 -> libpng12.so.0 to no
> > > avail. What is stange so is the fact that this link is not taken into
> > > account by ldconfig, ldconfig -p doesn't show it.
> > > ldconfig -p|grep png
> > >         libpng12.so.0 (libc6) => /usr/lib/libpng12.so.0
> > >         libpng12.so (libc6) => /usr/lib/libpng12.so
> > >
> > > ls -la /usr/lib/libpng*
> > > -rw-r--r-- 1 187938 2005-10-03 20:46 /usr/lib/libpng12.a
> > > lrwxrwxrwx 1  13  /usr/lib/libpng12.so -> libpng12.so.0
> > > lrwxrwxrwx 1  19  /usr/lib/libpng12.so.0 -> libpng12.so.0.1.2.8
> > > -rw-r--r-- 1  148320  /usr/lib/libpng12.so.0.1.2.8
> > > lrwxrwxrwx 1  /usr/lib/libpng.a -> libpng12.a
> > > lrwxrwxrwx 1  /usr/lib/libpng.so -> libpng12.so
> > > lrwxrwxrwx 1  /usr/lib/libpng.so.3 -> libpng12.so.0
> > >
> > > You've any further idea?