Problem with warning: gcrypt.h '...' is deprecated messages

[Stephen Fisher]

Since upgrading to libgcrypt 1.5.0 recently, I'm having problems with 
messages such as these...

/usr/local/include/gcrypt.h:1643: warning: 'gcry_ac_io_t' is deprecated
/usr/local/include/gcrypt.h:1649: warning: 'gcry_ac_id_t' is deprecated
/usr/local/include/gcrypt.h:1656: warning: 'gcry_ac_id_t' is deprecated

The release announcement for 1.5.0 says that using gcry_ac_ functions 
will produce compile time warnings.  We are not using those functions, 
so the mere inclusion of the gcrypt.h header file is causing these 
warnings because they are marked with the "_GCRY_ATTR_INTERNAL" macro, 
which becomes the gcc deprecated attribute.

I found this problem with a project I'm a developer for called 
Wireshark.  We compile with -Werror in development versions, so these 
warnings stop the compilation.  Compiling a simple hello world program 
with gcrypt.h included has the same problem.  Defining " 
_GCRYPT_IN_LIBGCRYPT" to "1" in Wireshark sources before the gcrypt.h 
inclusion works around this problem in my local sources.