/in/foo.c:1:1: warning: data definition has no type or storage class
 main [ - 1u ] = { 1 };
 ^~~~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'main' [-Wimplicit-int]
/in/foo.c:1:1: warning: 'main' is usually a function [-Wmain]
/tmp/ccPPCCXB.s: Assembler messages:
/tmp/ccPPCCXB.s: Fatal error: cannot fill 256 bytes in section .data of /tmp/ccFyCCle.o because: 'No space left on device'