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I've been looking for solutions, and honestly I'm stuck.

I'm trying to install Box2D, as you can see by the file paths.

Anyway, this prompt appears several times before the following:

The CXX compiler identification is unknown
Check for working CXX compiler: C:/MinGW/bin/g++.exe
Check for working CXX compiler: C:/MinGW/bin/g++.exe -- broken
CMake Error at C:/Program Files/CMake/share/cmake-3.6/Modules/CMakeTestCXXCompiler.cmake:54 (message):
 The C++ compiler "C:/MinGW/bin/g++.exe" is not able to compile a simple
 test program.

 It fails with the following output:

 Change Dir: C:/Users/alexm/Documents/Box2D/Build/CMakeFiles/CMakeTmp



 Run Build Command:"C:/MinGW/bin/mingw32-make.exe" "cmTC_31089/fast"

 C:/MinGW/bin/mingw32-make.exe -f CMakeFilescmTC_31089.dirbuild.make
 CMakeFiles/cmTC_31089.dir/build


 mingw32-make.exe[1]: Entering directory
 'C:/Users/alexm/Documents/Box2D/Build/CMakeFiles/CMakeTmp'


 Building CXX object CMakeFiles/cmTC_31089.dir/testCXXCompiler.cxx.obj


 C:MinGWbing++.exe -o CMakeFilescmTC_31089.dirtestCXXCompiler.cxx.obj
 -c
 C:UsersalexmDocumentsBox2DBuildCMakeFilesCMakeTmptestCXXCompiler.cxx



 CMakeFilescmTC_31089.dirbuild.make:64: recipe for target
 'CMakeFiles/cmTC_31089.dir/testCXXCompiler.cxx.obj' failed


 mingw32-make.exe[1]: ***
 [CMakeFiles/cmTC_31089.dir/testCXXCompiler.cxx.obj] Error 1


 mingw32-make.exe[1]: Leaving directory
 'C:/Users/alexm/Documents/Box2D/Build/CMakeFiles/CMakeTmp'


 Makefile:125: recipe for target 'cmTC_31089/fast' failed


 mingw32-make.exe: *** [cmTC_31089/fast] Error 2






 CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
 CMakeLists.txt:3 (project)


Configuring incomplete, errors occurred!
See also "C:/Users/alexm/Documents/Box2D/Build/CMakeFiles/CMakeOutput.log".
See also "C:/Users/alexm/Documents/Box2D/Build/CMakeFiles/CMakeError.log".

So, there's the error. I'm trying to install it on code::blocks with MinGW, I've currently got 2 copies of MinGW installed, one that's located in the code::blocks folder and the other is in my root drive, I installed MinGW seperately to fix this problem.

This is my first time using CMake, I'm trying to get it to work with my sfml project on code::blocks in C++.

Apologies if I missed anything, if you spot any information you'd need don't hesitate to comment!

Go to system variables and add

C:Program Files (x86)CodeBlocksMinGWbin

to your path

You should run Cmake as admin. I had the same problem, worked for me

You download libintl-8.dll and copy to C:MinGWbin:

https://www.dll-files.com/libintl-8.dll.html

It worked for me.