

This distribution includes both the ladspa.h API header file and a
  number of hosts and example plugins. Go to the src/
  directory and type make to build and test them.
The ladspa.h API header
    file is needed to build hosts and plugins. It may be useful to
  install it in /usr/local/include/ or
  /usr/include/. The programs generated in the
  bin/ directory may be moved to
  /usr/local/bin/ or /usr/bin/ and the
  plugins generated in the plugins/ directory may be
  moved to
  /usr/local/lib/ladspa/ or
  /usr/lib/ladspa/.
To perform automatic installation, log in as root and run
  make install. This by default will install plugins,
  hosts and the header file into the /usr/ tree.
