Howdy,

Some other small compilers (TinyCC and maybe ChibiCC) support automatic allocation of flexible array members upon initialization, and it would be really nice if cproc would support this as well, or at least error upon trying to use this construct.

On my x86_64 Debian Bookworm GNU/Linux system, the following program compiles successfully but segfaults at runtime:

int main(void) {
	struct {
		int i;
		char s[];
	} w = { .s = "Hello, world" };
}

With TinyCC, this does the common sense thing of allocating space for the string on the stack. GCC and Clang only support this construct if the struct is static. In this case though, we get a nifty assertion failure:

cproc-qbe: qbe.c:1449: emitdata: Assertion `offset <= d->type->size' failed.
cproc: compile: process signaled: Aborted