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Date: Thu, 23 Jun 2016 15:39:46 +0000
From: Andrei Pozolotin <andrei.pozolotin@...il.com>
To: musl@...ts.openwall.com
Subject: Re: musl ldd: swt build: Error relocating / symbol not found
Rich:
On 06/23/2016 04:24 AM, Rich Felker wrote:
> On Thu, Jun 23, 2016 at 03:35:02AM +0000, Andrei Pozolotin wrote:
>> https://github.com/random-alpiner/repository/blob/master/bugs/01/1-app.log
>> https://github.com/random-alpiner/repository/blob/master/bugs/01/2-ldd.log
>> https://github.com/random-alpiner/repository/blob/master/bugs/01/3-readelf.log
>>
>> My first guess would be that something else in the application
>> (eclipse) has already caused an older/stale version of libgobject to
>> be loaded, so that the version containing the symbol definition does
>> not get loaded. You could confirm this by running strace on the
>> program and checking what library files it loads/maps.
Thank you for the tip.
1) the trace shows:
https://github.com/random-alpiner/repository/blob/master/bugs/01/4-strace.log
2) that the proper /usr/lib/libgobject-2.0.so.0 is in fact loaded before
/usr/lib/libswt-atk-gtk-4530.so
3) however, the loading starts from
/home/work/space/none-4.5.0/conf/org.eclipse.osgi/748/0/.cp/libswt-gtk-4530.so,
which is an eclipse default library bundled with the eclipse
application, and which is compiled against foreign libc.6.so:
lddtree /home/work/space/none-4.5.0/conf/org.eclipse.osgi/748/0/.cp/libswt-gtk-4530.so
libswt-gtk-4530.so => /home/work/space/none-4.5.0/conf/org.eclipse.osgi/748/0/.cp/libswt-gtk-4530.so (interpreter => none)
libc.so.6 => not found
4) the library loading logic of eclipse is: first try to load bundled
libraries from private paths,
and if that fails, then try to load these libraries from the public
paths, such as "/usr/lib/*", etc.
5) I do provide replacement libswt-* libraries built against musl on the
public path "/usr/lib/*",
and the assumption was that when private path library loading fails,
then the library will be loaded from the public path, which "sort of
almost works",
so:
* was that a wrong assumption?
* will in fact musl ld.so reject libraries linked to the libc.so.6?
* if not, is there a way to tell musl ld.so to blacklist private path
libraries?
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