I have successfully emerged, built, and installed the graphviz ebuild. I can successfully build a C/C++ application that relies on one of the graphviz libraries. However, when attempting to execute the application that relies on graphviz, an "error while loading shared libraries: libagraph.so.0: cannot open shared object file: No such file or directory" error appears, and the program fails to execute. Reproducible: Always Steps to Reproduce: 1.emerge graphviz 2.build a C/C++ application that includes "agraph.h" 3.attempt to execute the new application Actual Results: the application fails to execute, and an error message appears that says ""error while loading shared libraries: libagraph.so.0: cannot open shared object file: No such file or directory" Expected Results: the application should have executed successfully this can be fixed easily by adding a "/usr/lib/graphviz" line to /etc/ld.so.conf; for some reason, env-update fails to add that line
Don't know anything about graphviz but as I see it you want to compile a custom app, so you should pass the library path to gcc (the -L option) to find the libagraph.so. I mark this as invalid because it doesn't break a package in portage and you probably don't want that we add every possible library path to ld.so.conf ;)
