Has anyone ever built omniORB on RHEL? - c++

Question

I am trying to build omniORB libraries on RHEL 5.5.
I tried running configure with
CC=gcc and CXX=g++ and PYTHON=bin/omnipython
I run into this problem where it complains about
gmake[3]: Entering directory `/home/local/NT/jayanthv/omniORB-4.1.4/src/lib/omniORB'
../../../bin/omniidl -bcxx -p../../../src/lib/omniORB -Wbdebug -Wba -p../../../src/lib/omniORB -Wbdebug -v -ComniORB4 ../../../idl/Naming.idl
omniidl: ERROR!
omniidl: Could not open IDL compiler module _omniidlmodule.so
omniidl: Please make sure it is in directory /home/local/NT/jayanthv/omniORB-4.1.4/lib
omniidl: (or set the PYTHONPATH environment variable)
omniidl: (The error was '/home/local/NT/jayanthv/omniORB-4.1.4/lib/_omniidlmodule.so: wrong ELF class: ELFCLASS64')
So, I tried to use the Intel C++ compiler instead, with
export CXX=/opt/intel/Compiler/11.1/080/bin/ia32/icc
export LD_LIBRARY_PATH=/opt/intel/Compiler/11.1/080/lib/ia32
export PYTHON=/home/local/NT/jayanthv/omniORB-4.1.4/bin/omnipython
But, now it complains about
../../../bin/omniidl -bcxx -p../../../src/lib/omniORB -Wbdebug -Wba -p../../../src/lib/omniORB -Wbdebug -v -ComniORB4 ../../../idl/Naming.idl
omniidl: ERROR!
omniidl: Could not open IDL compiler module _omniidlmodule.so
omniidl: Please make sure it is in directory /home/local/NT/jayanthv/omniORB-4.1.4/lib
omniidl: (or set the PYTHONPATH environment variable)
omniidl: (The error was '/home/local/NT/jayanthv/omniORB-4.1.4/lib/_omniidlmodule.so: undefined symbol: __cxa_pure_virtual')
The OS is RHEL 5.5 with x86_64 architecture, and I am trying to build the 32 bit binaries. Would appreciate any insight into this problem.

Answer 1

That's because omniidl is implemented as a Python extension module.
The Python executable you are using is a 64 bit executable, so it
can't load a 32 bit library.
Check this out http://objectmix.com/object/196129-compiling-omniorb-32bits-libraries-64bits-machine-suse.html

Answer 2

I finally found the magic combination to building omniORB on Linux using Intel compiler.
You see where it complains about '__cxa_pure_virtual' not found, this happens under gcc because it can't find a lib called libstdc++
So, make CC="icc -lstdc++" or CC="gcc -lstdc++" depending on which compiler you are using . Do the same for CXX (if using g++, specify it at g++)
And for Python, I used the omnipython which is a python1.5, PYTHON=bin/omnipython
which means it is looking relative to the omniORB root path.
You can see where it complains about 'wrong ELF class: ELFCLASS64', this is because you are trying to link a 32 bit binary using a 64 bit linker.
So, force your compiler and linker flags to 32.
CFLAGS=-m32 CXXFLAGS=-m32 LDFLAGS=-m32
Once done, run your configure
./configure --prefix=/opt/omniInst --build=i686-pc-linux-gnu
Run gmake followed by gmake install, and you will see all the binaries and libs under omniInst or whichever prefix directory you suggested.