[sigjuice]

How does one "just link against the code in addr2line" ?

[charcircuit]

You rename them main symbol to something else then you just call it like any other library.

[sigjuice]

addr2line is unlikely to be a trivial self-contained program without dependencies.

[charcircuit]

Then link to those dependencies.

[sigjuice]

Unnecessary. Most people's hands will be able to type up the required shell one-liner to do this.