问题
How can i extend default lib search path in ubuntu(in a way that it is also persistent) ? no, I do not want export LD_LIBRARY_PATH based temporary solution, rather some way to extend the default lib search path ?
while google-ing, I cam across some info, that in ubuntu the default search path resides in /etc/ld.so.conf.d , but editing libc.conf does not extended the default path.. so i think either i am doing it wrong, or something is missing...
the edited libc.conf looks like...
# libc default configuration
/usr/local/lib:/path_to_my_libraries/lib
回答1:
create (as root) a new file in /etc/ld.so.conf.d/ containing, the new path. For example:
sudo echo "/path-to-your-libs/" >> /etc/ld.so.conf.d/your.conf
after that run
sudo ldconfig
No need to change libc.conf.
回答2:
Using sudo, without becoming root
This will create a your.conf file with a reference to /path-to-your-libs/:
$ echo '/path-to-your-libs/' |sudo tee -a /etc/ld.so.conf.d/your.conf
Do not forget to finish off with a dynamic link library cache refresh:
$ sudo ldconfig
来源：https://stackoverflow.com/questions/9151491/extending-default-lib-search-path-in-ubuntu