error: ‘shared_mutex’ is not a member of ‘std’ using ReaderLock = std::shared_lock<std::shared_mutex>; - c++

Question

i'm trying to use microsoft SEAL library for homomorphic encryption and following the steps from the below link https://github.com/cyberweapons/SEAL/blob/master/INSTALL.txt
when i use command cmake .
terminal shows below result
-- SEAL detected (version 2.3.1)
-- SEAL build type: Release
-- SEAL debug mode: OFF
-- SEAL using Microsoft GSL: OFF
-- Configuring done
-- Generating done
-- Build files have been written to: /home/ravindra/Desktop/../../MiSEAL/SEAL/SEALExamples
after that when i give make command it should generate a file main.cpp.o instead it is giving the following errors.
[ 50%] Building CXX object CMakeFiles/sealexamples.dir/main.cpp.o
In file included from /usr/local/include/seal/util/mempool.h:12:0,
from /usr/local/include/seal/memorypoolhandle.h:6,
from /usr/local/include/seal/biguint.h:6,
from /usr/local/include/seal/bigpoly.h:9,
from /usr/local/include/seal/seal.h:3,
from /home/ravindra/Desktop/SakhaProjects/S20_AI/MiSEAL/SEAL/SEALExamples/main.cpp:12:
/usr/local/include/seal/util/locks.h:12:45: error: ‘shared_mutex’ is not a member of ‘std’
using ReaderLock = std::shared_lock<std::shared_mutex>;
^~~
/usr/local/include/seal/util/locks.h:12:45: error: ‘shared_mutex’ is not a member of ‘std’
/usr/local/include/seal/util/locks.h:12:62: error: template argument 1 is invalid
using ReaderLock = std::shared_lock<std::shared_mutex>;
^
/usr/local/include/seal/util/locks.h:14:45: error: ‘shared_mutex’ is not a member of ‘std’
using WriterLock = std::unique_lock<std::shared_mutex>;
^~~
/usr/local/include/seal/util/locks.h:14:45: error: ‘shared_mutex’ is not a member of ‘std’
/usr/local/include/seal/util/locks.h:14:62: error: template argument 1 is invalid
using WriterLock = std::unique_lock<std::shared_mutex>;
^
/usr/local/include/seal/util/locks.h:21:20: error: ‘ReaderLock’ does not name a type
inline ReaderLock acquire_read()
^~~~~~~~~~
/usr/local/include/seal/util/locks.h:26:20: error: ‘WriterLock’ does not name a type
inline WriterLock acquire_write()
^~~~~~~~~~
/usr/local/include/seal/util/locks.h:31:20: error: ‘ReaderLock’ does not name a type
inline ReaderLock try_acquire_read()
^~~~~~~~~~
/usr/local/include/seal/util/locks.h:36:20: error: ‘WriterLock’ does not name a type
inline WriterLock try_acquire_write()
^~~~~~~~~~
/usr/local/include/seal/util/locks.h:46:18: error: ‘shared_mutex’ in namespace ‘std’ does not name a type
std::shared_mutex rw_lock_mutex_;
^~~~~~~~~~~~
In file included from /usr/local/include/seal/memorypoolhandle.h:6:0,
from /usr/local/include/seal/biguint.h:6,
from /usr/local/include/seal/bigpoly.h:9,
from /usr/local/include/seal/seal.h:3,
from /home/ravindra/Desktop/SakhaProjects/S20_AI/MiSEAL/SEAL/SEALExamples/main.cpp:12:
/usr/local/include/seal/util/mempool.h: In member function ‘virtual int64_t seal::util::MemoryPoolMT::pool_count() const’:
/usr/local/include/seal/util/mempool.h:561:17: error: ‘ReaderLock’ was not declared in this scope
ReaderLock lock(pools_locker_.acquire_read());
^~~~~~~~~~
CMakeFiles/sealexamples.dir/build.make:62: recipe for target 'CMakeFiles/sealexamples.dir/main.cpp.o' failed
make[2]: *** [CMakeFiles/sealexamples.dir/main.cpp.o] Error 1
CMakeFiles/Makefile2:72: recipe for target 'CMakeFiles/sealexamples.dir/all' failed
make[1]: *** [CMakeFiles/sealexamples.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
i am new to SEAL library also i am a beginner to c++ programming, please someone help me to fix this issues.

Answer 1

Hi i found the solution,
i have included following commands in CMakeLists.txt file continued with the steps
`
# Below is TFHE START
export TFHE_PREFIX=/usr/local
export CPLUS_INCLUDE_PATH=${TFHE_PREFIX}/include:${CPLUS_INCLUDE_PATH}
export C_INCLUDE_PATH=${TFHE_PREFIX}/include:${C_INCLUDE_PATH}
export LIBRARY_PATH=${TFHE_PREFIX}/lib:${LIBRARY_PATH}
export LD_LIBRARY_PATH=${TFHE_PREFIX}/lib:${LD_LIBRARY_PATH}
# Below is TFHE END
`