Determining if the pthread_create exist failed with the following output:
Change Dir: /opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_345bf/fast"
make[1]: Entering directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_345bf.dir/build.make CMakeFiles/cmTC_345bf.dir/build
make[2]: Entering directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_345bf.dir/CheckSymbolExists.c.o
/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-gcc    -o CMakeFiles/cmTC_345bf.dir/CheckSymbolExists.c.o   -c /opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp/CheckSymbolExists.c
Linking C executable cmTC_345bf
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_345bf.dir/link.txt --verbose=1
/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-gcc      -rdynamic CMakeFiles/cmTC_345bf.dir/CheckSymbolExists.c.o  -o cmTC_345bf 
CMakeFiles/cmTC_345bf.dir/CheckSymbolExists.c.o: In function `main':
CheckSymbolExists.c:(.text+0xe): undefined reference to `pthread_create'
CheckSymbolExists.c:(.text+0x12): undefined reference to `pthread_create'
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_345bf.dir/build.make:97: recipe for target 'cmTC_345bf' failed
make[2]: *** [cmTC_345bf] Error 1
make[2]: Leaving directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_345bf/fast' failed
make[1]: *** [cmTC_345bf/fast] Error 2
make[1]: Leaving directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'

File /opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */
#include <pthread.h>

int main(int argc, char** argv)
{
  (void)argv;
#ifndef pthread_create
  return ((int*)(&pthread_create))[argc];
#else
  (void)argc;
  return 0;
#endif
}

Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: /opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_012e5/fast"
make[1]: Entering directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_012e5.dir/build.make CMakeFiles/cmTC_012e5.dir/build
make[2]: Entering directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_012e5.dir/CheckFunctionExists.c.o
/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-gcc   -DCHECK_FUNCTION_EXISTS=pthread_create   -o CMakeFiles/cmTC_012e5.dir/CheckFunctionExists.c.o   -c /usr/share/cmake-3.10/Modules/CheckFunctionExists.c
Linking C executable cmTC_012e5
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_012e5.dir/link.txt --verbose=1
/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-gcc  -DCHECK_FUNCTION_EXISTS=pthread_create    -rdynamic CMakeFiles/cmTC_012e5.dir/CheckFunctionExists.c.o  -o cmTC_012e5 -lpthreads 
/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/../lib/gcc/arm-linux-gnueabihf/6.2.1/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_012e5.dir/build.make:97: recipe for target 'cmTC_012e5' failed
make[2]: *** [cmTC_012e5] Error 1
make[2]: Leaving directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_012e5/fast' failed
make[1]: *** [cmTC_012e5/fast] Error 2
make[1]: Leaving directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'


Performing C++ SOURCE FILE Test MSGPACK_ENABLE_GCC_CXX_ATOMIC failed with the following output:
Change Dir: /opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_2bbf9/fast"
make[1]: Entering directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_2bbf9.dir/build.make CMakeFiles/cmTC_2bbf9.dir/build
make[2]: Entering directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_2bbf9.dir/src.cxx.o
/usr/bin/c++    -DMSGPACK_DEFAULT_API_VERSION=3 -std=c++98  -DMSGPACK_ENABLE_GCC_CXX_ATOMIC   -o CMakeFiles/cmTC_2bbf9.dir/src.cxx.o -c /opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp/src.cxx
/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp/src.cxx:2:10: fatal error: bits/atomicity.h: No such file or directory
 #include <bits/atomicity.h>
          ^~~~~~~~~~~~~~~~~~
compilation terminated.
CMakeFiles/cmTC_2bbf9.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_2bbf9.dir/src.cxx.o' failed
make[2]: *** [CMakeFiles/cmTC_2bbf9.dir/src.cxx.o] Error 1
make[2]: Leaving directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_2bbf9/fast' failed
make[1]: *** [cmTC_2bbf9/fast] Error 2
make[1]: Leaving directory '/opt/ti-processor-sdk-linux-am335x-evm-04.02.00.09/EVSE/GPL/msgpack-3.1.1/release/CMakeFiles/CMakeTmp'

Source file was:

#include <bits/atomicity.h>
int atomic_sub(int i) { return __gnu_cxx::__exchange_and_add(&i, -1) - 1; }
int atomic_add(int i) { return __gnu_cxx::__exchange_and_add(&i, 1) + 1; }
int main(int argc, char * argv[])
{
    atomic_sub(1);
    atomic_add(1);
}