aalogparse.h cannot be included from C++ code

[Steve Langasek]

aalogparse.h cannot be included from C++ code because it uses 'namespace' and 'class' as variable names, and these are reserved keywords in C++.

/usr/include/aalogparse/aalogparse.h:137:15: error: expected unqualified-id before ‘namespace’
  137 | char *namespace;
      | ^~~~~~~~~
/usr/include/aalogparse/aalogparse.h:163:15: error: expected unqualified-id before ‘class’
  163 | char *class;
      | ^~~~~

This is interesting to me because abi-compliance-checker necessarily processes all headers as C++; but it's likely of general interest to be able to link C++ code to libapparmor.

[John Johansen (jjohansen)]

Sigh, so this one is a bit of a pita. Minimal C code uses this and it is easy to update that. The problem comes with the SWIG interface libraries (python, ruby, etc) have baked these names into their API. We can update those but then we stand a good chance of breaking some external code.

Admittedly I don't know SWIG well, but I am looking into what can be done.

[Steve Langasek (vorlon)]

FWIW this is less interesting to me personally now, as I found the right switches to abi-compliance-checker to deal with C++ keywords as C variable names. And also it turns out there are a lot of C headers that have this problem. So while it's probably still interesting to someone to be able to use these headers from C++ code, that someone is no longer me :)