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Message-ID: <20160121224818.GE9621@port70.net>
Date: Thu, 21 Jan 2016 23:48:19 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: N Jain <jain61@...il.com>
Cc: musl@...ts.openwall.com
Subject: Re: MUSL issue while loading C++ lib
* N Jain <jain61@...il.com> [2016-01-21 16:17:36 -0500]:
> >
> > > i think the musl linker should be able to deal with this :P
> >
>
>
> Do you mean linking using "g++" is not right way ? I am trying to find out
i meant the musl dynamic linker that loads the .so at runtime,
not the static linker you used at compilation.
> if I could use "ld" directly but not sure what options to use and how to
> pass libs.
when in doubt use -v too see what options gcc passes to ld
> I am using below commands to compile and link
>
> gcc -c a.c -o bin/a.o
> g++ -c acpp.cpp -o bin/acpp.o
>
> g++ bin/a.o bin/acpp.o -o a.elf
>
> While reading about the difference between ld and g++ linking I found g++
> uses ld itself.
> Am I missing something ?
>
i dont think so
and i think the linked binary is fine
libstdc++.so.6 vs libgcc_s.so.1 has some issues
which makes the musl linker fail to find some symbols.
i can't help further, you will have to debug it,
i'd try to look at dso->strings with gdb and why the find_sym fails
or recompile musl with some dprintf added,
or try a known working toolchain and compare against it,
or wait for other ideas..
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