Date: Thu, 02 Apr 2015 14:17:36 -0400 From: Jean-Marc Pigeon <jmp@...e.ca> To: musl@...ts.openwall.com Subject: Re: perl native musl, ldd On 04/02/2015 12:18 PM, Rich Felker wrote: > On Thu, Apr 02, 2015 at 11:53:19AM -0400, Jean-Marc Pigeon wrote: >> Hello, >> >> >> I compiled perl (native, under gcc-musl) and I have >> a non expected result with ldd. >> >> Example: (with a musl system tree chroot) >> bash=4/3# cd /usr/lib/perl5/5.20.2/auto/IPC/SysV/ >> bash-4.3# ldd SysV.so >> ldd (0x7f5d60dd2000) >> libc.so => ldd (0x7f5d60dd2000) >> Error relocating SysV.so: Perl_croak: symbol not found >> Error relocating SysV.so: Perl_sv_setiv: symbol not found >> Error relocating SysV.so: Perl_sv_2pv_flags: symbol not found >> Error relocating SysV.so: Perl_av_store: symbol not found >> etc. >> >> While with glibc (with a glibc system tree chroot) >> bash-4.3# cd /usr/lib/perl5/5.20.2/auto/IPC/SysV >> bash-4.3# ldd SysV.so >> linux-vdso.so.1 (0x00007fff09556000) >> libc.so.6 => /lib64/libc.so.6 (0x00007f25be856000) >> /lib64/ld-linux-x86-64.so.2 (0x00007f25bee00000) >> >> I am puzzled about those "Error relocating" >> native (within musl) perl make didn't return error, >> so I am assuming everything went well. >> >> Advices...? hints? do we have a real problem >> with musl ldd or I goofed somehow? > > Hmm, it seems like glibc ldd does not (or at least does not always) > report symbols that can't be resolved. What seems to be happening is > that the above symbols are intended to be provided by the main program > (the perl interpreter) loading SysV.so rather than resolved via > library dependencies. > > I hadn't really considered using ldd on .so files, only on main > programs where this would not be an issue. > > If someone can help determine exactly what glibc ldd's behavior is > here (does it always ignore missing symbols? or only for .so files, > and if so, how does it distinguish .so file from main program?) it > should be easy to make musl's behavior match. > I am using a packager using ldd to establish dependencies list. -- A bientôt =========================================================== Jean-Marc Pigeon E-Mail: jmp@...e.ca SAFE Inc. Phone: (514) 493-4280 Clement, 'a kiss solution' to get rid of SPAM (at last) Clement' Home base <"http://www.clement.safe.ca"> =========================================================== Download attachment "smime.p7s" of type "application/pkcs7-signature" (3903 bytes)
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