When I follow these I'm getting:

:~/pd-0.46-0$ ./autogen.sh
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4/generated -I m4
autoreconf: configure.ac: tracing
autoreconf: configure.ac: adding subdirectory portaudio to autoreconf
autoreconf: Entering directory `portaudio'
autoreconf: configure.in: not using Gettext
autoreconf: running: aclocal --force
aclocal: warning: autoconf input should be named 'configure.ac', not 'configure.in'
autoreconf: configure.in: tracing
autoreconf: configure.in: subdirectory bindings/cpp not present
autoreconf: configure.in: not using Libtool
autoreconf: running: /usr/bin/autoconf --force
configure.in:104: error: possibly undefined macro: AC_LIBTOOL_WIN32_DLL
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
configure.in:105: error: possibly undefined macro: AC_PROG_LIBTOOL
autoreconf: /usr/bin/autoconf failed with exit status: 1

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