The same errors are detected with gcc-9.3.0. Ok, gcc 9 or 10. We can figure out the exact version where gcc started the errors if we need to. It doesn't happen with the much older gcc version I have (reports as gcc 4.8.5 on centos7, though centos does major patches to that).
Anyway, I guess the issue is that this two-line C++ program no longer compiles with new-enough gcc: extern "C" int yylex (void); extern int yylex (void); Can you discern what change to the code will pacify the compiler? I could not find the answer. (The "C" line is in the test sources. The non-"C" line is generated by (f)lex.) Thanks, Karl
