Determining if the include file pthread.h exists failed with the following output:
Change Dir: /home/naourr/work/instance-2/output/build/optee-client-3.4.0/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_cc132/fast"
gmake[1]: Entering directory '/home/naourr/work/instance-2/output/build/optee-client-3.4.0/CMakeFiles/CMakeTmp'
/usr/bin/gmake -f CMakeFiles/cmTC_cc132.dir/build.make CMakeFiles/cmTC_cc132.dir/build
gmake[2]: Entering directory '/home/naourr/work/instance-2/output/build/optee-client-3.4.0/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_cc132.dir/CheckIncludeFile.c.o
/home/naourr/work/instance-2/output/host/bin/arm-linux-gcc --sysroot=/home/naourr/work/instance-2/output/host/arm-buildroot-linux-uclibcgnueabihf/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os   -DNDEBUG   -o CMakeFiles/cmTC_cc132.dir/CheckIncludeFile.c.o   -c /home/naourr/work/instance-2/output/build/optee-client-3.4.0/CMakeFiles/CMakeTmp/CheckIncludeFile.c
/home/naourr/work/instance-2/output/build/optee-client-3.4.0/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:10: fatal error: pthread.h: No such file or directory
 #include <pthread.h>
          ^~~~~~~~~~~
compilation terminated.
gmake[2]: *** [CMakeFiles/cmTC_cc132.dir/build.make:66: CMakeFiles/cmTC_cc132.dir/CheckIncludeFile.c.o] Error 1
gmake[2]: Leaving directory '/home/naourr/work/instance-2/output/build/optee-client-3.4.0/CMakeFiles/CMakeTmp'
gmake[1]: *** [Makefile:121: cmTC_cc132/fast] Error 2
gmake[1]: Leaving directory '/home/naourr/work/instance-2/output/build/optee-client-3.4.0/CMakeFiles/CMakeTmp'