Hi Andrey Rahmatullin,
> > NOTE: libsharedlib1 has no SONAME
> If it has no SONAME then this won't work. Shared libraries should have
> SONAMEs (also, where that 1 does come from then?).
Well, upstream doesn't set SONAME, and ..
if I just put .so libs together with executables into into a
binary package, can I omit the absence of SONAME ?
> > [...]
> > ../lib/libsharedlib.so (0x00007f400a08e000) <--NOTICE
> Is this a problem? ldd resolves paths at the run time.
I didn't know this before.
After build I noticed that:
$ ldd caffe | grep libcaffe
libcaffe.so
=> /home/lumin/hdd/caffe/.build_release/tools/./../lib/libcaffe.so
(0x00007fb4c8160000)
To my surprise after I installed this executable to /usr/bin:
$ ldd caffe.bin | grep libcaffe
libcaffe.so => /usr/bin/./../lib/libcaffe.so
(0x00007fa36300f000)
Now I realized that, this is not a problem ...
> If it has rpath set then you should fix that. Otherwise it's not clear if
> the problem really exists as your example is artificial and doesn't show
> real things.
My problem in the original post was resolved.
And, I'm confused with the meaning of "rpath set ... fix that",
the Makefile of caffe indeed uses many -rpath options, e.g.
553 $(TOOL_BINS): %.bin : %.o | $(DYNAMIC_NAME)
554 @ echo CXX/LD -o $@
555 $(Q)$(CXX) $< -o $@ $(LINKFLAGS) -l$(PROJECT) $(LDFLAGS)
\
556 -Wl,-rpath,$(ORIGIN)/../lib
Is there any problem with "-rpath" that needs a fix ?
FYI: software caffe is available at:
https://github.com/BVLC/caffe
> > The question is, how to get hello linked to /usr/lib/libsharedlib.so,
> > since in fact that lib is located at $(CUDIR)/../lib/libsharedlib.so?
> There is no such thing. SONAMEs, not paths, are added to DT_NEEDED. If you
> mean rpath that's another question and it depends on your build system,
> among other things.
Got it. Now I know the lib path is not just a static string embedded
into ELFs ... I'm not familiar with ld.so's mechanism.
Thank you :-)
--
lumin <cdlumin...@gmail.com>
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