Heimdal provides its own definitions of OIDs like GSS_C_NT_USER_NAME
in the form of macros, which conflict with our attempt to redefine
them as variables - the macro gets expanded into the middle of the
variable declaration, leaving the poor C compiler trying to parse a
non-declaration along the lines of
const_gss_OID (&__gss_c_nt_anonymous_oid_desc) = oids+5;
Easily fixed by just not redefining these at all if they're already
defined as macros. To make that easier, I've broken up the oids[]
array into individual gss_OID_desc declarations, so I can put each one
inside the appropriate ifdef.
In the process, I've removed the 'const' from the gss_OID_desc
declarations. That's on purpose! The problem is that not all
implementations of the GSSAPI headers make const_gss_OID a pointer to
a *const* gss_OID_desc; sometimes it's just a plain one and the
'const' prefix is just a comment to the user. So removing that const
prevents compiler warnings (or worse) about address-taking a const
thing and assigning it into a non-const pointer.
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