Determining if the pthread_create exist failed with the following output:
Change Dir: /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp

Run Build Command:/usr/bin/make "cmTryCompileExec605575338/fast"
/usr/bin/make -f CMakeFiles/cmTryCompileExec605575338.dir/build.make CMakeFiles/cmTryCompileExec605575338.dir/build
make[1]: Entering directory `/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp'
/usr/bin/cmake -E cmake_progress_report /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CMakeFiles 1
Building C object CMakeFiles/cmTryCompileExec605575338.dir/CheckSymbolExists.c.o
/usr/lib/ccache/cc   -Wall -Wextra -pedantic -Wformat=2 -g -std=c99     -o CMakeFiles/cmTryCompileExec605575338.dir/CheckSymbolExists.c.o   -c /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c
/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main':
/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:11: warning: ISO C forbids conversion of function pointer to object pointer type [-Wpedantic]
   return ((int*)(&pthread_create))[argc];
           ^
Linking C executable cmTryCompileExec605575338
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTryCompileExec605575338.dir/link.txt --verbose=1
/usr/lib/ccache/cc  -Wall -Wextra -pedantic -Wformat=2 -g -std=c99      CMakeFiles/cmTryCompileExec605575338.dir/CheckSymbolExists.c.o  -o cmTryCompileExec605575338 -rdynamic 
CMakeFiles/cmTryCompileExec605575338.dir/CheckSymbolExists.c.o: In function `main':
/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8: undefined reference to `pthread_create'
collect2: error: ld returned 1 exit status
make[1]: *** [cmTryCompileExec605575338] Error 1
make[1]: Leaving directory `/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp'
make: *** [cmTryCompileExec605575338/fast] Error 2

File /var/uhubuild/work/compile/build/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: /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp

Run Build Command:/usr/bin/make "cmTryCompileExec1445051228/fast"
/usr/bin/make -f CMakeFiles/cmTryCompileExec1445051228.dir/build.make CMakeFiles/cmTryCompileExec1445051228.dir/build
make[1]: Entering directory `/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp'
/usr/bin/cmake -E cmake_progress_report /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CMakeFiles 1
Building C object CMakeFiles/cmTryCompileExec1445051228.dir/CheckFunctionExists.c.o
/usr/lib/ccache/cc   -Wall -Wextra -pedantic -Wformat=2 -g -std=c99  -DCHECK_FUNCTION_EXISTS=pthread_create   -o CMakeFiles/cmTryCompileExec1445051228.dir/CheckFunctionExists.c.o   -c /usr/share/cmake-2.8/Modules/CheckFunctionExists.c
Linking C executable cmTryCompileExec1445051228
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTryCompileExec1445051228.dir/link.txt --verbose=1
/usr/lib/ccache/cc  -Wall -Wextra -pedantic -Wformat=2 -g -std=c99  -DCHECK_FUNCTION_EXISTS=pthread_create    CMakeFiles/cmTryCompileExec1445051228.dir/CheckFunctionExists.c.o  -o cmTryCompileExec1445051228 -rdynamic -lpthreads 
/usr/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
make[1]: *** [cmTryCompileExec1445051228] Error 1
make[1]: Leaving directory `/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp'
make: *** [cmTryCompileExec1445051228/fast] Error 2