I got evince from SBO to build successfully with 13.37. I had the same libtool warnings as you but I think they are harmless. The real problem is, in my opinion, the error about AM_GCONF_SOURCE_2.
The evince.SlackBuild from SBO (at least the one that I have) passes the
option to configure.
It looks like you are not passing this parameter in the SlackBuild and are building with GConf enabled (I have not tried this.)
Edit: I have successfully rebuilt the package with the --with-gconf option. Of course I have the GConf package installed, which installs the file "/usr/share/aclocal/gconf-2.m4" where the AM_GCONF_SOURCE_2 macro is defined.
P.S. Do you have the GConf package installed?