[Openexr-devel] Fail to link at runtime on Kubuntu 13.04

[Charles Flèche]

Hi everyone,

I'm trying to compile and run the python tests from the git source. Both 
master (34f5447054) and develop (29c18ed125) branches fail.

When I run "python pyIexTest", I get a undefined symbol error 
Iex_2_0::BaseExc::what() const. After running ldd against 
.libs/iexmodule.so, it seems that iexmodule.so doesn't link against 
libPyIex.so.2

The link step clearly shows that libIex is not linked :

libtool: relink: g++  -fPIC -DPIC -shared -nostdlib 
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/crti.o 
/usr/lib/gcc/x86_64-linux-gnu/4.7/crtbeginS.o  .libs/iexmodule.o 
-Wl,-rpath -Wl,/home/charles/src/openexr/lib -L/usr/lib 
-L/home/charles/src/openexr/lib -lPyIex -lboost_python -lpython2.7 
-L/usr/lib/gcc/x86_64-linux-gnu/4.7 
-L/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu 
-L/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../lib 
-L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu 
-L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/4.7/../../.. -lstdc++ 
-lm -lc -lgcc_s /usr/lib/gcc/x86_64-linux-gnu/4.7/crtendS.o 
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/crtn.o  -O2 
  -pthread -Wl,-soname -Wl,iexmodule.so -o .libs/iexmodule.so

I can compile and run pyIexTest from the official 2.0.1 tarballs on the 
same machine. With this code base, the link step of iexmodule.so 
includes -lIex and ldd iexmodules.so shows a dependency to libIex.so

I've tracked down the problem to the PyIex Makefile line 391 :
$(iexmodule_la_LINK) -rpath $(pyexecdir) $(iexmodule_la_OBJECTS) 
$(iexmodule_la_LIBADD) $(LIBS)

This line is exactly the same in both git and the official tarballs. 
I've checked the values of the variables $(iexmodule_la_LINK), 
$(pyexecdir), $(iexmodule_la_OBJECTS), $(iexmodule_la_LIBADD) and 
$(LIBS), there are the same in both case. However they yield a different 
g++ command.

Could it be a problem with the libtool / autoconf version ?

My versions :
libtool 2.4.2-1.2ubuntu1
autoconf : 2.69-1ubuntu1

and just in case :
boost : 1.53

Just to make sure I'm following the recommended steps, after a git clone 
I run bootstrap, then set LD_LIBRARY_PATH and PKG_CONFIG_PATH to the 
relevant paths (subdirs of my prefix), then ./configure 
--prefix=my_prefix, make, make install

Does someone else has the same problem ? I may miss something really 
obvious...

Many thanks,

Charles