svnpenn/rtmpdump — pull request #3 by ryancole (2012-05-14 00:01:50+00:00)
Title: Add libm for functions such as `sqrt` on Ubuntu.

When compiling on Ubuntu, I received the following error messages ...

```
librtmp/librtmp.so: undefined reference to `sqrt'
librtmp/librtmp.so: undefined reference to `atan'
librtmp/librtmp.so: undefined reference to `exp'
```
So, I've added libm to the `Makefile`, for POSIX builds.