Improved error reporting for CPython 3.10—and beyond

Improved error reporting for CPython 3.10—and beyond

gcc 11.2 still thinks the error is in the main file. Perhaps fixed it in gcc12? I tried it with a one-line header include missing a semicolon. With gcc11

$ gcc -c test.c
test.c: In function ‘printhello’:
test.c:3:12: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
    3 | int main() {
      |            ^
test.c:6: error: expected ‘{’ at end of input

$ clang -c test.c
In file included from test.c:1:
./printhello.h:1:18: error: expected ';' after top level declarator
void printhello() 
                 ^
                 ;
1 error generated.