This no longer works. For some reason the Makefile was deleted in svn 17057. I suppose this has to do with the GIT transition? I tried to build it with the top level configure but got this:

=== configuring in libs/silk (/mnt/disk2/freeswitch_dev/libs/silk)
configure: running /bin/bash ./configure.gnu --disable-option-checking '--prefix=/mnt/disk2/freeswitch'  'CONFIGURE_CFLAGS=-g -O2' 'CONFIGURE_CXXFLAGS=-g -O2' 'CONFIGURE_LDFLAGS=' --cache-file=/dev/null --srcdir=.
./configure.gnu: line 3: ./configure: No such file or directory
configure: error: ./configure.gnu failed for libs/silk


On Sat, Mar 13, 2010 at 2:51 AM, Jason White <jason@jasonjgw.net> wrote:
Code has now been posted at https://developer.skype.com/silk/

It appears from that page that there may be patent issues for anything other
than testing of the codec, although it is stated elsewhere that the licence
terms are royalty-free.

To build the module (for those planning to do the aforementioned testing) you
need to run make in libs/silk first to compile the library, then build
FreeSWITCH; this will change once the build system is updated appropriately.