Re: Failed to execute /init (error -2) for system-wide musl libc

["Matias A. Fonzo" <selk@dragora.org>]

Hola Jesús,
El Wed, 31 Dec 2014 20:49:06 +0100
"piranna@gmail.com" <piranna@gmail.com> escribió:
> > i think if static init works then try to use
> > that to boot up the system and then debug the
> > dynamic case..
> 
> It's a good idea, didn't though about it :-)
> 
> 
> > you can run libc.so with a dynamic executable
> > as argument then you can debug the loader
> 
> Definitely I can be able to use Node.js child_process module to launch
> libc.so, I'll try it :-)
> 
> 
> > if you have no debug tools on the target then
> > i think you can add dprintf's to early loader
> > code in src/ldso/dynlink.c which may help in
> > figuring out what fails
> 
> It's just a Node.js REPL, so no debug tools here (at least, no C ones,
> like GDB), but knowing that src/ldso/dynlink.c has the code of the
> dynamic linker, add some debug printf's seems a good idea, I believe
> although it's in the boot process it should write some output to the
> console...
> 
> 
> >> executables compiled with the cross-toolchain works on our desktops
> >> but they don't on QEmu, and we've added all the dynamic libraries
> >> that readelf request (only libc.so, libstdc++.so & libgcc_s.so).
> >> As a
> >
> > libgcc_s.so shouldnt be needed
> 
> It's shown as a dependency of libstdc++.so both by ldd and readelf -d.
> Maybe could this be the issue? Both libstdc++.so & libgcc_s.so are
> compiled against musl...
> 
> 
> >> curious side note, when installing the musl-linked gcc libraries,
> >> the /lib/ld-musl-i386.so.1 link dissapear from the cross-toochain
> >> folder,
> >
> > sounds like a clfs buildsystem issue
> 
> Or CLFS, or gcc, but it's something curious because before the
> compilation of libstdc++.so & libgcc_s.so against musl the symbolic
> link is there, and after compile them the symbolic link has
> dissapear... It doesn't makes sense... :-/
> 

You've used CLFS-embedded, right?.  Probably you are getting
dynamic-link issues because the steps used for musl in CLFS-embedded
are not linked with the cross binutils (or the binutils from the
clfs-toolchain).  You need to add CROSS_COMPILE="${CLFS_TARGET}-" to the
environment.

> 
> > i've seen the symlink disappearing on openwrt buildsystem once
> > (that one was not deterministic) i'm not sure what caused it
> 
> In my case is deterministic, allways happens on the libstdc++.so &
> libgcc_s.so generation step (more exactly, the make install on the
> cross-toolchain directory), checked by doing them by hand :-/
> 
>