main function must return int - Rebuild of the Debian archive with clang

"main function must return int" build failure(s) — clang 3.9.1

clang refuses void main(...
This code fails:

#include <stdio.h>
void main() {
    printf("Hello world\n");
}

Replacing void by int fixes the issue.

Package	Version	Supposed error message	Full log	Bug report
bwbasic	2.20pl2-11	bwx_tty.c:69:1: error: 'main' must return 'int'	Log	~~742848~~

1 errors