https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80071
--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- Note that there are two different proposals regarding __LINE__ for Markham. http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2115.htm http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2129.pdf (The former is the one relevant to this issue.)