fix all missing instances of __cplusplus checks/extern "C" in headers
-rw-r--r-- 26428 COPYING
-rw-r--r-- 2371 COPYRIGHT
-rw-r--r-- 5415 INSTALL
-rw-r--r-- 2852 Makefile
-rw-r--r-- 2180 README
-rw-r--r-- 11473 WHATSNEW
drwxr-xr-x - arch
drwxr-xr-x - crt
drwxr-xr-x - dist
drwxr-xr-x - include
drwxr-xr-x - lib
drwxr-xr-x - src
drwxr-xr-x - tools