Hi all

I seemed to have accidentally touched / replaced libpng on my FC6 system. Now I get these errors when using several apps - eject and emacs serve as examples:

emacs: /usr/local/lib/libpng12.so.0: no version information available (required by emacs)

[root@StefanLinux ~]# eject
eject: /usr/local/lib/libpng12.so.0: no version information available (required by /usr/lib/libcairo.so.2)

Also, it is suddenly impossible to compile any GTK application on my newly-installed FC6 box. Here is the failure in compile for gftp:

aking all in gtk
make[3]: Entering directory `/home/rylan/gftp-2.0.18/src/gtk'
gcc -O3 -fomit-frame-pointer -ffast-math -fexpensive-optimizations -fstrict-aliasing -funroll-loops -funroll-all-loops -fforce-addr -finline-functions -frerun-loop-opt -falign-loops=4 -falign-jumps=4 -falign-functions=4 -march=i686 -mmmx -msse2 -o gftp-gtk bookmarks.o chmod_dialog.o delete_dialog.o dnd.o gftp-gtk.o gtkui.o gtkui_transfer.o menu-items.o misc-gtk.o options_dialog.o transfer.o view_dialog.o ../../lib/libgftp.a ../../lib/fsplib/libfsp.a ../uicommon/libgftpui.a -L/lib -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lm -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -ldl -lglib-2.0 -lpthread -lutil -lnsl -lm -lgthread-2.0 -lcrypto -lssl
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_destroy_read_struct@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_write_fn@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_filler@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_read_update_info@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_tRNS_to_alpha@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_create_info_struct@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_get_valid@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_bKGD@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_read_image@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_get_io_ptr@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_write_end@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_gray_1_2_4_to_8@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_write_image@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_packing@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_strip_16@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_gray_to_rgb@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_palette_to_rgb@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_read_info@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_write_info@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_interlace_handling@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_error@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_write_user_transform_fn@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_convert_from_time_t@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_read_fn@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_get_IHDR@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_read_end@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_IHDR@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_read_user_transform_fn@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_destroy_write_struct@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_create_write_struct@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_create_read_struct@PNG12_0'
/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../libcairo.so: undefined reference to `png_set_tIME@PNG12_0'
collect2: ld returned 1 exit status
make[3]: *** [gftp-gtk] Error 1
make[3]: Leaving directory `/home/rylan/gftp-2.0.18/src/gtk'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/rylan/gftp-2.0.18/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/rylan/gftp-2.0.18'
make: *** [all] Error 2
[rylan@StefanLinux gftp-2.0.18]$

How the do I fix this so I can compile GTK apps again? And that almost all executable stop complaing about "missing version information" for libpng?

I have disabled SELinux in /etc and also removed kernel level support for it. I'm running a custom compiled 2.6.18.1 kernel. GTK apps compiled fine under this new kernel before "something" happened to its libpng, that now seems to have broken heaps of stuff...

How do I fix this?

Thanks!

Hi again guys

I fixed this by doing the following.

In /usr/local/lib I found that

libpng.so
libpng.so.0

were symlinks to

libpng12.so.0.1.2.8

I changed these two symlinks to link to

libpng.so.3.1.2.8

which was also in my /usr/local/lib.

This stopped the error messages with eject and emacs, and now GTK apps compile 100% again!

Regards,

I put the above into a cronjob that runs every minute.

Reason: If I compile any GTK application, this error re-appears. Something, somwhere seems to re-create the symlink over and over, so I created a cronjob that keeps on deleting the symlink.

Everything is fine now.