Since BIND 9 headers are not longer public, there's no reason to keep the ISC_LANG_BEGINDECL and ISC_LANG_ENDDECL macros to support including them from C++ projects.
Since BIND 9 headers are not longer public, there's no reason to keep the ISC_LANG_BEGINDECL and ISC_LANG_ENDDECL macros to support including them from C++ projects.