"relocation R_X86_64_32 against `.bss' can not be used when making a shared..." error

[aryan1]

Hi All,

I am getting "relocation R_X86_64_32 against `.bss' can not be used when making a shared object; recompile with -fPIC" error when compiling a shared object with optimization option -O2 enabled using GNU GCC:

First, I compile a static library, which is used by the shared object, as follows:

g++  -g -O2 -c common/src/packet-class-registry.cc
ar  -cvq libclassreg.a common/src/packet-class-registry.o

Below is how I compile the shared object, which uses libclassreg.a:

g++  -g -O2 -fPIC -c packet-v4.cc -o packet-v4.o 
gcc  -shared -Wl,-soname,libv4.so.1 -o libv4.so.1.0 packet-v4.o -Lcommon/lib -Lconf/configLib/lib -lclassreg -lNsConf 
/usr/bin/ld: common/lib/libclassreg.a(packet-class-registry.o): relocation R_X86_64_32 against `.bss' can not be used when making a shared object; recompile with -fPIC
common/lib/libclassreg.a: could not read symbols: Bad value
collect2: ld returned 1 exit status
make: *** [libv4.so] Error 1

Is this a problem regarding the order of compiler options ? (-O2 appears before -fPIC)

Or is it something else ?

Thanks.

[olivthill2]

1. Maybe it is rather packet-class-registry.cc that needs to be compiled with -fPIC

2. I have used g++ for compiling and also for linking. I am not sure gcc and g++ are working well together all the time.

3. I am puzzled by the commas in the command line.