11 files from c-testsuite fail to compile

[samkho]

11 (out of 220) test files from https://github.com/c-testsuite/c-testsuite/tree/master/tests/single-exec fail to compile with chibicc. They compile successfully with gcc.

Errors below:

00075
00075.c:74: #error fail
^ error

00121
00121.c:1: int f(int a), g(int a), a;
^ expected '{'

00152
00152.c:6: #error " # line line" not work as expected
^ error

00162
00162.c:2: void fooc(int x[const 5]);
^ expected an expression

00170
00170.c:22: enum efoo;
^ unknown enum type

00204
internal error at parse.c:1413

00209
00209.c:3: enum E *e;
^ unknown enum type

00210
00210.c:14: extern void foo (void) attribute((stdcall));
^ expected '{'

00213
00213.c:17: ({
^ statement expression returning void is not supported

00214
00214.c:13: if (__builtin_expect(!!(_brk_start == 0), 0))
^ implicit declaration of a function

00216
00216.c:88: union UV guv3 = {.b = 8, .a = 7};
^ expected '}'