Hi, please ignore this question, I have found the answer yet. Thanks anyway.
在2020年11月6日星期五 UTC+8 上午11:56:00<Chen Wang> 写道：
> hello,
> I am building bionic libc with tag 10.0.0_r39
> in file bionic/libc/bionic/strtold.cpp, I see following codes：
>
> extern "C" int __strtorQ(const char*, char**, int, void*);
>
> long double strtold(const char* s, char** end_ptr) {
> #if defined(__LP64__)
> long double result;
> __strtorQ(s, end_ptr, FLT_ROUNDS, &result);
> return result;
> #else
> // This is fine for LP32 where long double is just double.
> return strtod(s, end_ptr);
> #endif
> }
>
> I searched sourcecode, but could not find "__strtorQ()". Why the the build
> can pass?
>
> Thanks in adv.
>
>
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