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Date: Wed, 26 Jun 2024 01:49:09 +0000 (UTC)
From: Thorsten Glaser <>
Subject: Re: roundf() (and round(), and ...)

enh dixit:

>bionic actually uses __builtin_fabs() [and friends] to _implement_
>these functions, should someone be foolish enough to be using a

That’ll be fun should the compiler decide to insert a call to
fabs() at the call site instead, which it’d be allowed to do ☺

Stories of compilers doing that abound… IIRC it was the compiler
recognising the implementation pattern of memcpy and replacing
that by a call to memcpy… in some libc’s that was not careful to
use -ffreestanding memcpy implementation.

15:41⎜<Lo-lan-do:#fusionforge> Somebody write a testsuite for helloworld :-)

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