If updating to the latest PortAudio SVN doesn't fix the issue, this is the suggestion from the mailing list:
Remove -Werror from the build script and replace it with -Wall
Or try adding -Wno-deprecated before -Werror
If you do try adding -Wno-deprecated please let us know how you go since this is currently the preferred option, although it hasn't been tested much yet.
By "build script" they mean configure.in, I believe.