I'm trying make a Visual Studio solution with Cmake to compile the latest version of aseprite and the cmake keeps giving me the :
No CMAKE_C_COMPILER could be found.
No CMAKE_CXX_COMPILER could be found.
Those error messages
CMake Error at ... (project): No CMAKE_C_COMPILER could be found. -- Configuring incomplete, errors occurred! See also ".../CMakeFiles/CMakeOutput.log". See also ".../CMakeFiles/CMakeError.log".
CMake Error: your CXX compiler: "CMAKE_CXX_COMPILER-NOTFOUND" was not found. Please set CMAKE_CXX_COMPILER to a valid compiler path or name. ... -- Configuring incomplete, errors occurred!
just mean that CMake was unable to find your C/CXX compiler to compile a simple test program (one of the first things CMake tries while detecting your build environment).
The steps to find your problem are dependent on the build environment you want to generate. The following tutorials are a collection of answers here on StackOverflow and some of my own experiences with CMake on MS Windows 7/8.
You have a clean build directory (because CMake does cache things from the last try) e.g. as sub-directory of your source tree
> rmdir /s /q VS2015 > mkdir VS2015 > cd VS2015
$ rm -rf MSYS $ mkdir MSYS $ cd MSYS
and make sure your command shell points to your newly created binary output directory.
General things you can/should try
Is CMake able find and run with any/your default compiler? Run without giving a generator
> cmake .. -- Building for: Visual Studio 14 2015 ...
Perfect if it correctly determined the generator to use - like here
Visual Studio 14 2015
What was it that actually failed?
In the previous build output directory look at
CMakeFiles\CMakeError.log for any error message that make sense to you or try to open/compile the test project generated at
CompilerIdCXX directly from the command line (as found in the error log).
CMake can't find Visual Studio
Try to select the correct generator version
> cmake --help > cmake -G "Visual Studio 14 2015" ..
If that doesn't help try to set the VS environment variables first (the path could vary)
> "c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" > cmake ..
or use the
Developer Command Prompt for VS2015 short-cut in your Windows Start Menu under
Visual Studio 2015/
Visual Studio Tools (thanks at @Antwane for the hint)
Background: CMake does support all Visual Studio releases and flavors (Express, Community, Professional, Premium, Test, Team, Enterprise, Ultimate, ...). To determine the location of the compiler it uses a combination of searching the registry (e.g. at
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\[Version];InstallDir), system environment variables and - if none of the others did come up with something - plainly try to call the compiler.
CMake can't find GCC (MinGW/MSys)
You start the MSys
bash shell with
msys.bat and just try to directly call
$ gcc gcc.exe: fatal error: no input files compilation terminated.
Here it did find
gcc and is complaining that I didn't gave it any parameters to work with.
So the following should work:
$ cmake -G "MSYS Makefiles" .. -- The CXX compiler identification is GNU 4.8.1 ... $ make
If GCC was not found call
export PATH=... to add your compilers path (see How to set PATH environment variable in CMake script?) and try again.
If it's still not working, try to set the CXX compiler path directly by exporting it (path may vary)
$ export CC=/c/MinGW/bin/gcc.exe $ export CXX=/c/MinGW/bin/g++.exe $ cmake -G "MinGW Makefiles" .. -- The CXX compiler identification is GNU 4.8.1 ... $ mingw32-make
For more details see how to specify new gcc path for cmake
Note: When using the "MinGW Makefiles" generator you have to use the
mingw32-make program distributed with MinGW
Still not working? That's weird. Please make sure that the compiler is there and it has executable rights (see also preconditions chapter above).
Otherwise the last resort of CMake is to not try any compiler search itself and set CMake's internal variables directly by
$ cmake -DCMAKE_C_COMPILER=/c/MinGW/bin/gcc.exe -DCMAKE_CXX_COMPILER=/c/MinGW/bin/g++.exe ..
Alternatively those variables can also be set via
cmake-gui.exe on Windows. See Cmake cannot find compiler
Background: Much the same as with Visual Studio. CMake supports all sorts of GCC flavors. It searches the environment variables (CC, CXX, ...) or simply tries to call the compiler. In addition it will detect any prefixes (when cross-compiling) and tries to add it to all binutils of the GNU compiler toolchain (