Re: build musl with clang

[agent <agentprog@gmail.com>]

25.08.2012 06:09, Rich Felker пишет:
> Here's an idea for a workaround:
>
> void *not_called_malloc(size_t) __asm__("malloc");
> #define malloc not_called_malloc
>
> If that fixes it, it would be an amusing way to present it in the bug
> report.
>
> Rich
that is stilled optimized for a plain malloc call even if i call 
not_called_malloc directly and not via a macro. to test the bug i used 
the following function:

void *foo(size_t n) {
static char buf[200];
return buf + 10;
}

and that was the way when 'if' was not optimized out. if i use malloc in 
foo() it is still wiped out.
as far as i know, optimizations are done not only in clang itself but in 
llvm too, so maybe if clang does not notice malloc, llvm does.