New installation of cmake "is not able to compile a simple test program." - c++

Question

I am using Cmake 3.5.1, and need to compile some C++ codes that needs Cmake 3.7. I am using Ubuntu 16.04.
I can't uninstall Cmake 3.5.1 as it is bundled with ROS and doing so will break ROS. Hence, I installed CMake 3.12.3 using the instructions from here but in a different directory (/usr/local/cmake-3.12.3).
Running the commands in terminal to check versions:
cmake version 3.12.3
gcc version 5.4.0
g++ (Ubuntu 5.4.0-6ubuntu1~16.04.10) 5.4.0
Next, I try to compile the C++ codes
cd /media/fastrl-master
sudo cmake .
I got an error that CMake is unable to compile a simple test program. I have tried setting the permissions of the folder containing the C++ codes (fastrl-master), and also to install build essentials (apt install --reinstall build-essential). These did not work.
This is the contents of CMakeError.log
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler: /usr/local/src/cmake-3.12.3
Build flags: Id flags:
The output was: Permission denied
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler: /usr/local/src/cmake-3.12.3
Build flags: Id flags: -c
The output was: Permission denied
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler: /usr/local/src/cmake-3.12.3
Build flags: Id flags: --c++
The output was: Permission denied
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler: /usr/local/src/cmake-3.12.3
Build flags: Id flags: --ec++
The output was: Permission denied
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler: /usr/local/src/cmake-3.12.3
Build flags: Id flags:
The output was: Permission denied
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler: /usr/local/src/cmake-3.12.3
Build flags: Id flags: -c
The output was: Permission denied
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler: /usr/local/src/cmake-3.12.3
Build flags: Id flags: --c++
The output was: Permission denied
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler: /usr/local/src/cmake-3.12.3
Build flags: Id flags: --ec++
The output was: Permission denied
Checking whether the CXX compiler is IAR using "" did not match "IAR
.+ Compiler": Checking whether the CXX compiler is IAR using "" did
not match "IAR .+ Compiler": Determining if the CXX compiler works
failed with the following output: Change Dir:
/media/fastrl-master/CMakeFiles/CMakeTmp
Run Build Command:"/usr/bin/make" "cmTC_662e1/fast" /usr/bin/make -f
CMakeFiles/cmTC_662e1.dir/build.make CMakeFiles/cmTC_662e1.dir/build
make1: Entering directory '/media/fastrl-master/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_662e1.dir/testCXXCompiler.cxx.o
/usr/local/src/cmake-3.12.3 -o
CMakeFiles/cmTC_662e1.dir/testCXXCompiler.cxx.o -c
/media/fastrl-master/CMakeFiles/CMakeTmp/testCXXCompiler.cxx make1:
execvp: /usr/local/src/cmake-3.12.3: Permission denied
CMakeFiles/cmTC_662e1.dir/build.make:65: recipe for target
'CMakeFiles/cmTC_662e1.dir/testCXXCompiler.cxx.o' failed make1: *
[CMakeFiles/cmTC_662e1.dir/testCXXCompiler.cxx.o] Error 127 make1:
Leaving directory '/media/fastrl-master/CMakeFiles/CMakeTmp'
Makefile:121: recipe for target 'cmTC_662e1/fast' failed make: *
[cmTC_662e1/fast] Error 2