CMake error at CMakeLists txt 30 project No CMAKE C COMPILER could be found

Question

I m trying make a Visual Studio solution with CMake to compile the latest version of aseprite and CMake keeps giving me the   No CMAKE C COMPILER could be found  No CMAKE CXX COMPILER could be found    I ve already downloaded GCC  and I m using Visual nbsp Studio nbsp 2015   I m following this tutorial   https   github com aseprite aseprite blob master INSTALL md

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You can also make sure you are the sudo user and you have READ WRITE access on the directory you are working  I had a similar problem on OS nbsp X  and I got it fixed just by entering in sudo mode

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Just in  case it helps any one like me in future   I have had this issue for 24 hours now  on 3 different 64-bit machines Win7   Windows 8 1 VM and WIn 8 1 laptop  - whilst trying to build WebKit with VS 2017   The simple issue here is that the VC   compiler  i e cl exe and it s dependent DLLs  is not visible to CMake  Simple  By making the VC   folders containing those binaries visible to CMake and your  working command prompt if you re running Cmake from a command prompt   voila   In addition to key points raised by others   above   Anyway  after all kinds of fixes - as posted on these many forums- I discovered that it was SIMPLY a matter of ensuring that the PATH variable s contents are not cluttered with multiple Visual Studio BIN paths etc  and instead  points to    a  the location of your compiler  i e  cl exe for your preferred version of Visual Studio    which in my case targeting 64-bit platform  and developing on a 64-bit host   is  C  Program Files  x86  Microsoft Visual Studio 2017 Community VC Tools MSVC 14 15 26726 bin Hostx64 x64  b  and in addition  the folder containing a dependent DLL called  which cl exe is dependent on   api-ms-win-crt-runtime-l1-1-0 dll - which on my machine is   C  Program Files  x86  Microsoft Visual Studio 2017 Community Common7 IDE Remote Debugger x64  These two directories being added to a simplified and CUSTOM System Path variable working under a Admin priviledged commmand prompt   eliminated my  No CMAKE C COMPILER could be found  and  No CMAKE CXX COMPILER could be found   errors   Hope it helps someone

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I ran into this issue while building libgit2-0 23 4  For me the problem was that C   compiler  amp  related packages were not installed with VS2015  therefore  C  Program Files  x86  Microsoft Visual Studio 14 0 VC vcvarsall bat  file was missing and Cmake wasn t able to find the compiler   I tried manually creating a C   project in the Visual Studio 2015 GUI  C  Program Files  x86  Microsoft Visual Studio 14 0 Common7 IDE devenv exe   and while creating the project  I got a prompt to download the C    amp  related packages    After downloading required packages  I could see vcvarsall bat  amp  Cmake was able to find the compiler  amp  executed successfully with following log   C  Users aksmahaj Documents MyLab fritzing libgit2 build64 gt cmake    -- Building for  Visual Studio 14 2015 -- The C compiler identification is MSVC 19 0 24210 0 -- Check for working C compiler  C  Program Files  x86  Microsoft Visual         Studio 14 0 VC bin cl exe -- Check for working C compiler  C  Program Files  x86  Microsoft Visual   Studio 14 0 VC bin cl exe -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Could NOT find PkgConfig  missing   PKG CONFIG EXECUTABLE  -- Could NOT find ZLIB  missing   ZLIB LIBRARY ZLIB INCLUDE DIR  -- zlib was not found  using bundled 3rd-party sources  -- LIBSSH2 not found  Set CMAKE PREFIX PATH if it is installed outside of  the default search path  -- Looking for futimens -- Looking for futimens - not found -- Looking for qsort r -- Looking for qsort r - not found -- Looking for qsort s -- Looking for qsort s - found -- Looking for clock gettime in rt -- Looking for clock gettime in rt - not found -- Found PythonInterp  C  csvn Python25 python exe  found version  2 7 1   -- Configuring done -- Generating done -- Build files have been written to      C  Users aksmahaj Documents MyLab fritzing libgit2 build64

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I had the same problem   I was trying to install dlib on my machine and it gave me this error  The tutorial mentioned in the question leads to downloading visual studio 2017  I solved this by uninstalling VS 2017 and installing VS 2015  One can install VS 2015 via this stackoverflow thread      How to download Visual Studio Community Edition 2015  not 2017

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None of the solutions here solves my problem - only when I install Windows Update for universal C runtime   Now CMake is working and no more link hangs from Visual Studio   Update for Universal C Runtime in Windows

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I get exactly the reported error if ccache is enabled  when using CMake s Xcode generator  Disabling ccache fixed the problem for me  Below I present a fix check that works for MacOS  but should work similarly on other platforms   Apparently  it is possible to use CMake s Xcode generator  and others  also in combination with ccache  as is described here  But I never tried it out myself     1  To check if ccache is enabled  echo  CC echo  CXX   This prints something like the following         ccache clang -Qunused-arguments -fcolor-diagnostics     CC or CXX are typically set in the   bashrc  or   zshrc  file      2  To disable ccache  use the following  CC clang CXX clang      3  Then regenerate the cmake project cmake -G Xcode  lt path to CMakeLists txt gt

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For me it worked to use the Developer Command Prompt that comes with Visual Studio and then just cd to your jcef dir and run cmake -G  Visual Studio 14 Win64

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Look in the Cmakelists txt if you find ARM you need to install C   for ARM  It s these packages    C   Universal Windows Platform for ARM64  Not Required   Visual C   Compilers and libraries for ARM  Not Required   Visual C   Compilers and libraries for ARM64  Very Likely Required   Required for finding Threads on ARM  enable language C   enable language CXX    Then the problems   No CMAKE C COMPILER could be found   No CMAKE CXX COMPILER could be found   Might disappear unless you specify c compiler like clang  and maybe installing clang will work in other favour   You can with optional remove in cmakelists txt both with   before enable language if you are not compiling for ARM

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I had the same issue with cmake-gui  No CMAKE CXX COMPILER could be found    while running CMake from the command line worked fine  After manually adding the entries  C  Program Files  x86  Microsoft Visual Studio 14 0 VC bin  C  Program Files  x86  Microsoft Visual Studio 2017 Community MSBuild 15 0 Bin  to the PATH environment variable it worked for me

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I updated Visual Studio 2015 update 2 to Visual Studio 2015 update 3  and it solved my problem

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I had the same errors with CMake  In my case  I have used the wrong Visual Studio version in the initial CMake dialog where we have to select the Visual Studio compiler   Then I changed it to  Visual Studio 11 2012  and things worked   I have Visual Studio Ultimate 2012 version on my PC   In general  try to input an older version of Visual Studio version in the initial CMake configuration dialog

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I know this question is about visual studio 2015  I faced this issue with visual studio 2017  When searched on google I landed to this page  After looking at first 2 3 answers I realized this is the problem with vc   installation  Installing the workload  Desktop development with c    resolved the issue

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I also experienced this error when working with CMake   No CMAKE C COMPILER could be found  No CMAKE CXX COMPILER could be found    The  warning  box in the MSDN library article Visual C   in Visual Studio 2015 gave me the help that I needed   Visual Studio 2015 doesn t come with C   installed by default  So  creating a new C   project will prompt you to download the necessary C   components

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This works for me in Ubuntu nbsp 17 10  Artful Aardvark    apt-get update apt-get install build-essential

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For Ubuntu  please install the below things   sudo apt-get update  amp  amp  sudo apt-get install build-essential

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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     or  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 Stack nbsp Overflow and some of my own experiences with CMake on Microsoft Windows 7 8 10 and Ubuntu 14 04   Preconditions   You have installed the compiler IDE and it was able to once compile any other program  directly without CMake    You e g  may have the IDE  but may not have installed the compiler or supporting framework itself like described in Problems generating solution for VS 2017 with CMake or How do I tell CMake to use Clang on Windows   You have the latest CMake version You have access rights on the drive you want CMake to generate your build environment You have a clean build directory  because CMake does cache things from the last try  e g  as sub-directory of your source tree  Windows cmd exe   gt  rmdir  s  q VS2015  gt  mkdir VS2015  gt  cd VS2015   Bash shell    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   gt  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 CMakeFiles  Version  CompilerIdC 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    gt  cmake --help  gt  cmake -G  Visual Studio 14 2015      If that doesn t help  try to set the Visual Studio environment variables first  the path could vary     gt   c  Program Files  x86  Microsoft Visual Studio 14 0 VC vcvarsall bat   gt  cmake      or use the Developer Command Prompt for VS2015 short-cut in your Windows Start Menu under All Programs 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  etc    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 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      For more details see Cmake doesn  39 t honour -D CMAKE CXX COMPILER g   and Cmake error setting compiler  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  etc   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  ar  ranlib  strip  ld  nm  objdump  and objcopy

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Make sure you have selected the correct version of Visual Studio  This is trickier than it seems because Visual Studio 2015 is actually Visual Studio 14  and similarly Visual Studio 2012 is Visual Studio 11  I had incorrectly selected Visual Studio 15 which is actually Visual Studio 2017  when I had 2015 installed

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For me  this problem went away on Windows when I moved my project to a shallower parent directory  i e  to   C  Users spenc Desktop MyProjectDirectory  instead of  C  Users spenc Desktop     MyProjectDirectory   I think the source of the problem was that MSBuild has a file path length restriction to 260 characters  This causes the basic compiler test CMake performs to build a project called CompilerIdCXX vcxproj to fail with the error   C1083  Cannot open source file   CMakeCXXCompilerId cpp   because the length of the file s path e g   C  Users spenc Desktop     MyProjectDirectory build CMakeFiles     CMakeCXXCompilerId cpp  exceeds the MAX PATH restriction   CMake then concludes there is no CXX compiler

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This happened to me after I installed Visual Studio 15 2017   The C   compiler for Visual Studio 14 2015 was not the problem  It seemed to be a problem with the Windows 10 SDK   Adding the Windows nbsp 10 SDKs to Visual Studio 14 2015 solved the problem for me   See attached screenshot

[c++] CMake error at CMakeLists.txt:30 (project): No CMAKE_C_COMPILER could be found

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