Problem
You include some system header, compile and you get undefined reference to X and now need to hunt down the library you need to link.
Solution
You run sudo updatedb to update your file location database, then libfinder -u to update the lookup table and then libfinder -s X and libfinder will tell you which libraries define the symbol you need.
Further options
Output of libfinder -h:
libfinder finds the libraries that define a given symbol.
Run 'sudo updatedb' to make sure all libs are locatable, create an index with
'libfinder -u' (once every time your libs change) and look up a symbol with
'libfinder -s [symbol]' to get a list of libraries that define [symbol].
Parameters:
-h [ --help ] print this
-u [ --update ] [=arg(=8)] update lookup table (must be done before first
use) with given number of threads (default=8)
-s [ --symbol ] arg the symbol to look up
Example output
% libfinder -s mysql_init
All symbols that have the prefix "mysql_init" and their libraries:
mysql_init
/usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
/usr/lib/x86_64-linux-gnu/libmysqlclient.so.18.1.0
/usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.18
/usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.18.1.0
mysql_init_character_set
/usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
/usr/lib/x86_64-linux-gnu/libmysqlclient.so.18.1.0
/usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.18
/usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.18.1.0
Future work
Add an option to instead of printing the file path, print either the linker flags or makefile line or CMakeLists.txt entry or qmake file entry to link that library.