[gentoo-user] Re: libpng12 is missing

[Harry Putnam <reader@newsguy.com>]

Alex Schuster <wonko@wonkology.org> writes:

> After writing down some ideas about installing the old libraries somewhere 
> in parallel, I just checked eix, and there is an extra slot for the 1.2 
> version. So, just emerge media-libs/libpng:1.2 , and I'd expect all to be 
> fine then.

Doesn't seem to be the case here. (Some details below), But do we have
a accepted way to handle this problem now?

-------        ---------       ---=---       ---------      -------- 

eix shows both versions installed with 1.2.43-r3 in slots (1.2) and
1.4.2 in slot 0.  Or at least I THINK thats what that output means.
(Asterisks added ed -hp)

I] media-libs/libpng
     Available versions:  
        (0)     1.2.43-r2 (~)1.4.2
        (1.2)   (~)1.2.43-r3
     Installed versions:  ( ** 1.2.43-r3(1.2) ** )(10:18:02 05/23/10) 
                          ( ** 1.4.2 ** ) 10:14:51 

But still some pkgs strike out from what appears to be libpng errors:

Example: xfce-base/thunar-1.0.2, (Wrapped for mail)
(Emphasis added with asterisks -ed hp)
-------        ---------       ---=---       ---------      -------- 
tail of emerge:

,----
| [...]
| 
| /usr/lib/gcc/i686-pc-linux-gnu/4.4.3/../../../../\
|      i686-pc-linux-gnu/bin/ld:
| 
|   ****  cannot find -lpng12 ****
| 
| collect2: ld returned 1 exit status
| make[4]: *** [thunar-tpa] Error 1
| 
| make[4]: Leaving directory
| `/var/tmp/portage/xfce-base/thunar-1.0.2/work/\
|       Thunar1.0.2/plugins/thunar-tpa'
| 
| make[3]: *** [all] Error 2
| 
| make[3]: Leaving directory
| `/var/tmp/portage/xfce-base/thunar-1.0.2/work/\
|     Thunar1.0.2/plugins/thunar-tpa'
| 
| make[2]: *** [all-recursive] Error 1
| 
| make[2]: Leaving directory
| `/var/tmp/portage/xfce-base/thunar-1.0.2/work/Thunar1.0.2/plugins'
| 
| make[1]: *** [all-recursive] Error 1
| 
| make[1]: Leaving directory
| `/var/tmp/portage/xfce-base/thunar-1.0.2/work/Thunar1.0.2'
| 
| make: *** [all] Error 2
|  * ERROR: xfce-base/thunar-1.0.2 failed:
|  *   emake failed
|  * 
|  * Call stack:
|  *     ebuild.sh, line   54:  Called src_compile
|  *   environment, line 3219:  Called xfconf_src_compile
|  *   environment, line 3866:  Called die
|  * The specific snippet of code:
|  *       emake || die "emake failed"
| 
| [...]
| 
| >>> Failed to emerge xfce-base/thunar-1.0.2,
`----

The log files show a 8-9 pkgs failing... I'm not sure about all of
them but at least 5 are for this same error.