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Message-ID: <20141001181356.GQ21835@port70.net>
Date: Wed, 1 Oct 2014 20:13:56 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: converting gcc from glibc to musl
* stephen Turner <stephen.n.turner@...il.com> [2014-10-01 13:54:25 -0400]:
> On Wed, Oct 1, 2014 at 12:10 PM, Szabolcs Nagy <nsz@...t70.net> wrote:
> > - can gcc compile a minimal program (empty main)?
> >
>
> I can compile the following program sucessfully to a.out but cannot run it.
>
> # include <stdio.h>
> main()
> {
> printf("hello world\n");
> }
>
> gcc test.c && chmod +x a.out && ./a.out
>
>
> > - where does gcc/ld fail, how were they invoked (gcc -v)?
>
>
> configure:2078: loading cache /dev/null
...
i meant running
gcc -v test.c
not the configure thing
(so we know if the compiler works at all before
starting to debug the configure script)
> - in the executable is the loader properly set up (readelf)?
>
check if the machine type/abi is ok:
readelf -h a.out
check if the musl loader is set up as expected:
readelf -l a.out
(in case of dynamic linking the interpreter should be
/lib/ld-musl-ARCH.so.1 otherwise there should be no
interpreter)
> - check if the loader/libc at the right path
>
ls -l /lib/ld-musl-*
> - can you run the executable with the loader explicitly?
run
/lib/ld-musl-ARCH.so.1 ./a.out
> > - strace the executable, where does it fail?
strace ./a.out
>
> I dont know how to do what your asking here is there a site i can ref on
> these troubleshooting steps?
if you are not experienced with toolchains i'd try
alpine or sabotage linux first
you might be able to customize them to your liking
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