Re: Does newlib support x86_64-pc-linux-gnu?

[Keith Packard <keithp@keithp.com>]

[-- Attachment #1: Type: text/plain, Size: 1014 bytes --]

jdoubleu <hi@jdoubleu.de> writes:

> I'm trying to run the testsuite on my linux host. Right now, all tests 
> are linked against glibc, causing me to test glibc instead of newlib.
>
> This would really help me testing newlib, because I don't have any 
> "special" hardware, nor emulators setup. It does also offer the 
> possibility to test newlib farily easy in a CI.

It's possible, and picolibc (a newlib fork) uses this in it's CI
setup. What you do is link newlib *before* glibc so that you pull in the
newlib upper-level functions and then use glibc for the syscalls.

It does make some development easier, but there are places which are a
bit funky -- the 'stat' syscall, in particular, where you need to
declare struct stat so that it matches glibc but without using glibc
headers (as you'll be compiling against newlib headers).

It's not that hard to use an arm or risc-v emulator with semihosting
support to test the library though, and that avoids issues like that.

-- 
-keith

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 832 bytes --]