This was done on a Ubuntu 14.04 system with wxWidgets 3.1.1 installed.
The resulting buildfiles successfully build Audacity on Ubuntu 14.04 (with 3.1.1) and on Travis (with 3.0.0).
This way, building the minsrc tarball doesn't require multiple versions
of Automake to be installed. (Most things were at the 1.11 version, but
some were at the 1.14 version.)
Building minsrc should now work just fine.
enable support for using the system portaudio library. The latter
also corrects a long standing bug that prevented using config.status
to regenerate src/Makefile.
As a result of the above, I've taken Benjamin's *_LOCAL_CONFIGURE_ARGS
idea and propagated its usage to the other place where ac_configure_args
was being set directly.
Removed old stuff from lib-src/Makefile.in and made the library locations
for portaudio and portmixer like the rest (a symlink in lib-src).
Reworked portmixer's configure.ac to properly detect host apis.
