CMake unable to configure Toolchain C Compiler, No Latin Symbols

The C compiler

"C:/MinGW/bin/gcc.exe"

is not able to compile a simple test program.

It fails with the following output:

Change Dir: C:/Users/JEK/AppData/Local/Temp/cmake_check_environment/_build16890483661168579677/CMakeFiles/CMakeTmp

Run Build Command(s):C:/MinGW/bin/mingw32-make.exe cmTC_fcfb1/fast && C:/MinGW/bin/mingw32-make.exe -f CMakeFiles\cmTC_fcfb1.dir\build.make CMakeFiles/cmTC_fcfb1.dir/build
mingw32-make.exe[1]: Entering directory 'C:/Users/JEK/AppData/Local/Temp/cmake_check_environment/_build16890483661168579677/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_fcfb1.dir/testCCompiler.c.obj
C:\MinGW\bin\gcc.exe -o CMakeFiles\cmTC_fcfb1.dir\testCCompiler.c.obj -c C:\Users\JEK\AppData\Local\Temp\cmake_check_environment\_build16890483661168579677\CMakeFiles\CMakeTmp\testCCompiler.c
CMakeFiles\cmTC_fcfb1.dir\build.make:64: recipe for target 'CMakeFiles/cmTC_fcfb1.dir/testCCompiler.c.obj' failed
mingw32-make.exe[1]: *** [CMakeFiles/cmTC_fcfb1.dir/testCCompiler.c.obj] Error 1
mingw32-make.exe[1]: Leaving directory 'C:/Users/JEK/AppData/Local/Temp/cmake_check_environment/_build16890483661168579677/CMakeFiles/CMakeTmp'
Makefile:120: recipe for target 'cmTC_fcfb1/fast' failed
mingw32-make.exe: *** [cmTC_fcfb1/fast] Error 2

CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
CMakeLists.txt:1 (project)

-- Configuring incomplete, errors occurred!
See also "C:/Users/JEK/AppData/Local/Temp/cmake_check_environment/_build16890483661168579677/CMakeFiles/CMakeOutput.log".
See also "C:/Users/JEK/AppData/Local/Temp/cmake_check_environment/_build16890483661168579677/CMakeFiles/CMakeError.log".

Error code: 1

How do I fix this?