Cannot build C++ Real-Time SDK 2.0.0.L1 for Linux

After decompressing the file RTSDK-2.0.0.L1.linux.rrg.tar.gz, I followed the documentation to first run LinuxSoLink, then use cmake to build it. The command I used is:

cmake -H. -Bcmake_gcc831

The process didn't show any error in the middle, but in the end it showed:

[100%] Built target cjson
Install the project...
-- Install configuration: "Release"
-- Installing: /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/install/include/cjson/cJSON.h
-- Installing: /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/install/lib64/pkgconfig/libcjson.pc
-- Installing: /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/install/lib64/libcjson.a
-- Installing: /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/install/lib64/cmake/cJSON/cjson.cmake
-- Installing: /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/install/lib64/cmake/cJSON/cjson-release.cmake
-- Installing: /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/install/lib64/cmake/cJSON/cJSONConfig.cmake
-- Installing: /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/install/lib64/cmake/cJSON/cJSONConfigVersion.cmake
[100%] Completed 'cjson'
[100%] Built target cjson
-- Skipping Eta Doxygen Build: BUILD_ETA_DOXYGEN:OFF
-- Skipping Ema Doxygen Build: BUILD_EMA_DOXYGEN:OFF
-- Configuring incomplete, errors occurred!
See also "/home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/CMakeFiles/CMakeOutput.log".

In the CMakeOutput.log file, I don't see any errors. The tail of the file is:

Determining if the pthread_create exist passed with the following output:
Change Dir: /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_17bc5/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_17bc5.dir/build.make CMakeFiles/cmTC_17bc5.dir/build
gmake[1]: Entering directory '/mnt/jbod/home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_17bc5.dir/CheckSymbolExists.c.o
/usr/bin/cc   -m64 -DCOMPILE_64BITS -fPIC -D_DEFAULT_SOURCE=1  -DLinux -DLINUX -Dx86_Linux_4X -Dx86_Linux_5X -Dx86_Linux_6X -DLinuxVersion=4 -pthread -D_iso_stdcpp_ -D_POSIX_SOURCE=1 -D_POSIX_C_SOURCE=199506L -D_XOPEN_SOURCE=500 -D_GNU_SOURCE -DNDEBUG -O3 -fbuiltin    -o CMakeFiles/cmTC_17bc5.dir/CheckSymbolExists.c.o   -c /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/CMakeFiles/CMakeTmp/CheckSymbolExists.c
Linking C executable cmTC_17bc5
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_17bc5.dir/link.txt --verbose=1
/usr/bin/cc -m64 -DCOMPILE_64BITS -fPIC -D_DEFAULT_SOURCE=1  -DLinux -DLINUX -Dx86_Linux_4X -Dx86_Linux_5X -Dx86_Linux_6X -DLinuxVersion=4 -pthread -D_iso_stdcpp_ -D_POSIX_SOURCE=1 -D_POSIX_C_SOURCE=199506L -D_XOPEN_SOURCE=500 -D_GNU_SOURCE -DNDEBUG -O3 -fbuiltin     CMakeFiles/cmTC_17bc5.dir/CheckSymbolExists.c.o  -o cmTC_17bc5
gmake[1]: Leaving directory '/mnt/jbod/home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/CMakeFiles/CMakeTmp'

File /home/wdeng/RTSDK-2.0.0.L1.linux.rrg/cmake_gcc831/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
}