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Date: Sun, 14 Feb 2021 06:59:35 +0100
From: Markus Wichmann <>
Subject: Re: Can’t build musl with

On Sat, Feb 13, 2021 at 06:54:24PM +0100, Tim Tassonis wrote:
> On 2/1/21 10:20 PM, Jiahao XU wrote:
> > And if I changed puts to printf and uses -fno-builtin, it also generates
> > a 16KB executable.
> Strange, I get 19k without -fno-builtin and 28K with it:

GCC detects the use of printf() with only a constant string ending in \n
and replaces it with a call to puts(). You can see that by looking at
the disassembly, or making GCC generate the assembly.


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