Linking shared library, undefined symbol __pure_virtual

Linking shared library, undefined symbol __pure_virtual

[Kris Munch]

Hello - 

 I have a legacy c++ function that I need to link into
a shared library, so that a c function can call it.
The c function is them called from within oracle using
extproc (external procedure). I can use the c++ and c
library from an executable that I compile using g++,
but oracle is having trouble calling the c++ function,
and gives this error:
 "undefined symbol __pure_virtual".

 I assume this has to do with linking the c++ library.
I have tried many different command for this,
including using ld and g++. This is the ld command I
tried:
 /usr/bin/ld -shared
-L/usr/lib/gcc-lib/i386-redhat-linux/2.96 
-L/usr/lib/gcc-lib/i386-redhat-linux/2.96/../../.. 
-L/usr/oracle/OraHome1/lib 
-L/usr/oracle/OraHome1/lib/krm 
-o libaddimgs.so addimgs.o 
/usr/oracle/OraHome1/lib/libpls9.a 
-lgcc -lstdc++ -lm -lgcc -lc -lgcc -lclntsh 
-lpsyimg `cat /usr/oracle/OraHome1/lib/sysliblist`
-ldl -lm 
-rpath
/usr/oracle/OraHome1/lib/krm:/usr/oracle/OraHome1/lib

I have also tried this g++ command:
g++ -shared -o libaddimgs.so -lc addimgs.o -lpsyimg
-L/usr/oracle/OraHome1/lib
-L/usr/oracle/OraHome1/lib/krm -lpthread -lm -ldl
-lstdc++ -lm -lgcc -lc -lgcc

THe ld command is the one that gives __pure_virtual
error. When i try to use the g++ command, I get an RPC
connection error, which basically means the call to
the function crashed/failed.

I can nm libgcc.a and see the __pure_virtual symbol. I
am linking in -lgcc in my command, so it should find
it. 

ANy ideas? 




		
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