Newlib provided syscalls on SH

Jeff Johnston
Tue Aug 9 19:29:23 GMT 2022

Hi Yilin,

You will need to patch the libc/sys/sh/ to match what is done
in libc/sys/arm/  This is fairly simple.  When you are done,
then you can
use the --disable-newlib-supplied-syscalls to omit whatever you want in the
libc/sys/sh directory.   Feel free to submit the patch here when you have
it working to your satisfaction.

-- Jeff J.

On Mon, Aug 8, 2022 at 3:56 AM imi415 via Newlib <>

> Hi all,
> I'm trying to build newlib for SuperH(sh) architecture, and the syscalls
> under the "newlib/libc/sys/sh" directory
> are built no matter whether "--disable-newlib-supplied-syscalls" is
> provided.The target is a bare-metal target
> so I need to provide these syscalls myself, same as other bare-metal
> targets do.
> I have checked the under the directory and there seems to be
> no special treatments for the "MAY_SUPPLY_SYSCALLS" option.
> Do I have to patch newlib for this or is there another way overriding
> these syscalls?
> P.S. The build environment is generated by Crosstool-NG.
> Thanks & Best Regards,
> Yilin Sun

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