[cfe-dev] clang-cl emitting call to __udivti3 resolved from where?
Stephan Bergmann via cfe-dev
cfe-dev at lists.llvm.org
Wed Nov 22 09:01:40 PST 2017
On 11/22/2017 05:54 PM, Stephen Canon wrote:
> __udivti3 is provided by compiler-rt.
Yeah, but clang-cl won't link against anything from there. Sorry for
being unclear in my original mail. So if you actually try to link test2.c
> unsigned __int128 f(unsigned __int128 a, unsigned __int128 b) { return a / b; }
> int main() { return 0; }
on Windows with
> clang-cl test2.c
it will fail with "error LNK2019: unresolved external symbol __udivti3
referenced in function f".
>> On Nov 22, 2017, at 11:41 AM, Stephan Bergmann via cfe-dev <cfe-dev at lists.llvm.org> wrote:
>>
>> At least on recent trunk, a simple test.c
>>
>>> unsigned __int128 f(unsigned __int128 a, unsigned __int128 b) { return a / b; }
>>
>> compiled as
>>
>>> clang-cl /c /FA test.c
>>
>> will contain a call to __udivti3 (see generated test.asm), but it is not clear to me from where that symbol is supposed to be resolved when actually linking test.obj?
More information about the cfe-dev
mailing list