Comment 11 for bug 629955

See

http://audacity.238276.n2.nabble.com/audacity-trunk-fails-to-build-tp5417386p5419334.html

and

http://audacity.238276.n2.nabble.com/configure-error-on-Ubuntu-10-10-td5495951.html#a5495951

(Build logs available there)

configure failed for lib-src/portmixer

Benjamin Drung gets this problem on Ubuntu 10.10 and says there is no system port audio version nor other portmixer headers installed.

Richard thinks it's an Audacity problem which only shows up with very recent toolchains (maybe GCC-version sensitive). The problem has been reported as a Gentoo bug as well. The speculation there was that some change in recent GCC had broken one of the autoconf macros we use in the portmixer configure script
(AC_EGREP_HEADERS?).