Determining if the pthread_create exist failed with the following output:
Change Dir: /impala/develop-3.3.0/Impala/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake cmTC_2125a/fast 
/usr/bin/gmake -f CMakeFiles/cmTC_2125a.dir/build.make CMakeFiles/cmTC_2125a.dir/build
gmake[1]: Entering directory '/impala/develop-3.3.0/Impala/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_2125a.dir/CheckSymbolExists.c.o
/toolchain/gcc-4.9.2/bin/gcc    -o CMakeFiles/cmTC_2125a.dir/CheckSymbolExists.c.o   -c /impala/develop-3.3.0/Impala/CMakeFiles/CMakeTmp/CheckSymbolExists.c
Linking C executable cmTC_2125a
/toolchain/cmake-3.14.3/bin/cmake -E cmake_link_script CMakeFiles/cmTC_2125a.dir/link.txt --verbose=1
/toolchain/gcc-4.9.2/bin/gcc      -rdynamic CMakeFiles/cmTC_2125a.dir/CheckSymbolExists.c.o  -o cmTC_2125a 
CMakeFiles/cmTC_2125a.dir/CheckSymbolExists.c.o: In function `main':
CheckSymbolExists.c:(.text+0x16): undefined reference to `pthread_create'
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_2125a.dir/build.make:86: recipe for target 'cmTC_2125a' failed
gmake[1]: *** [cmTC_2125a] Error 1
gmake[1]: Leaving directory '/impala/develop-3.3.0/Impala/CMakeFiles/CMakeTmp'
Makefile:121: recipe for target 'cmTC_2125a/fast' failed
gmake: *** [cmTC_2125a/fast] Error 2

File /impala/develop-3.3.0/Impala/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: /impala/develop-3.3.0/Impala/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake cmTC_f194b/fast 
/usr/bin/gmake -f CMakeFiles/cmTC_f194b.dir/build.make CMakeFiles/cmTC_f194b.dir/build
gmake[1]: Entering directory '/impala/develop-3.3.0/Impala/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_f194b.dir/CheckFunctionExists.c.o
/toolchain/gcc-4.9.2/bin/gcc   -DCHECK_FUNCTION_EXISTS=pthread_create   -o CMakeFiles/cmTC_f194b.dir/CheckFunctionExists.c.o   -c /toolchain/cmake-3.14.3/share/cmake-3.14/Modules/CheckFunctionExists.c
Linking C executable cmTC_f194b
/toolchain/cmake-3.14.3/bin/cmake -E cmake_link_script CMakeFiles/cmTC_f194b.dir/link.txt --verbose=1
/toolchain/gcc-4.9.2/bin/gcc  -DCHECK_FUNCTION_EXISTS=pthread_create    -rdynamic CMakeFiles/cmTC_f194b.dir/CheckFunctionExists.c.o  -o cmTC_f194b -lpthreads 
/toolchain/binutils-2.26.1/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_f194b.dir/build.make:86: recipe for target 'cmTC_f194b' failed
gmake[1]: *** [cmTC_f194b] Error 1
gmake[1]: Leaving directory '/impala/develop-3.3.0/Impala/CMakeFiles/CMakeTmp'
Makefile:121: recipe for target 'cmTC_f194b/fast' failed
gmake: *** [cmTC_f194b/fast] Error 2