how to get a dynamic link library about volepsi about volepsi

[ladnir]

set VOLE_PSI_PIC to be true. https://github.com/Visa-Research/volepsi/blob/main/cmake/buildOptions.cmake#L46. i.e.

cmake -DVOLE_PSI_PIC=true ... or python3 -DVOLE_PSI_PIC=true

[TY-cc]

Thank you. I have try to use this way, but report error as follow:

[ 13%] Linking CXX shared library libvolePSI.so
/usr/bin/ld: /home/cc/VOLE/volepsi-main/out/install/linux/lib/libcoproto.a(SocketScheduler.cpp.o): relocation R_X86_64_PC32 against symbol `_ZTVSt12system_error@@GLIBCXX_3.4.11' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status

On the other hand，I have a problem. I try to set "-fPIC" about sub-library, they have "libOTe.a", "libcrytoTools.a", and "libcoproto.a". I added the instruction ' set _ property ( TARGET XXX PROPERTY POSITION _ INDEPENDENT _ CODE ON ) ' to their cmake file, the libOTe.a and libcrytoTools.a compile success, but the libcoproto.a report same error. why?

[TY-cc]

I cleaned up the previous installation using “--clean” and rebuilt it using “python3 build.py-DCOPROTO _ ENABLE _ BOOST = ON-DCOPROTO _ ENABLE _ OPENSSL = ON-DVOLE _ PSI _ PIC = true”. A new error occurred, but the error type is the same

/usr/bin/ld: /home/cc/VOLE/volepsi-main/out/install/linux/lib/libbitpolymul.a(bc.cpp.o): relocation R_X86_64_PC32 against symbol `_ZN3bpm6_sh_opE' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status

[ladnir]

yeah, that one might be a bit tricky. That library has assembly in it and I'm not totally sure if we can set PIC for it. But we can try,

in out/bitpolymul/bitpolymul/CMakeLists.txt, you can add -fPIC to the target_compile_options command. You will then need to delete

out/install
out/libOTe/out/install

and then call python3 build.py

[TY-cc]

Cool, your method succeeded. I tried add 'add _ compile _ options ( -fPIC ) ' in /bitpolymul/bitpolymul/CMakeLists.txt, but it was useless. Here, -fPIC must be added to target _ compile _ options.
Thank you for your reply

[ladnir]

Great, we can leave this open and when I have time I'll fix this in bitpolymul and close it.

[TY-cc]

All right, listen to your arrangement. Thanks again

[RindalVisa]

ok. the PIC flag should now hopefully work better. Changed the option name to VOLE_PSI_ENABLE_PIC but i think VOLE_PSI_PIC should still work. See the readme.

[TY-cc]

I want to remove the version number of the library. How to i modify it ? thanks

[ladnir]

I doubt that's what you actually want to do. Why would you want to remove it?

If you really want to know it's in cmake I believe.

[TY-cc]

I wrote a new interface in the dynamic library to facilitate my own call. But this requires a link soft link can be done. I know that the library 's version information is in the vole-main / volepsi / cmakelist file, please forgive me for trying to get lazy. Sorry

[ladnir]

OK, glad you figured it out