According to the [Release Notes][1], with CMake 3.12 it can be done cross-platform:

&gt; The [`cmake(1)`][2] [Build Tool Mode][3] (`cmake –build`) gained `--parallel [&lt;jobs&gt;]` and `-j [&lt;jobs&gt;]` options to specify a parallel build level. They map to corresponding options of the native build tool.

[1]: https://cmake.org/cmake/help/v3.12/release/3.12.html#command-line
[2]: https://cmake.org/cmake/help/v3.12/manual/cmake.1.html#manual:cmake(1)
[3]: https://cmake.org/cmake/help/v3.12/manual/cmake.1.html#build-tool-mode

You can pass arbitrary arguments to the native build tool with `--`. Everything after `--` will be passed to the build tool. To pass `-j 3` in your example, just use

    cmake --build . --config Release -- -j 3

Documentation: https://cmake.org/cmake/help/v3.5/manual/cmake.1.html

You could also use Ninja as a build tool, it uses automatically an appropriate number of threads. Or you can modify the make command by defining `CMAKE_MAKE_PROGRAM=&quot;make -j 3`. But this is a rather hacky workaround.

I recently changed from the Enthought Canopy Python distribution to Anaconda, which includes the Spyder IDE.

In Canopy&#39;s code editor, it was possible to comment and uncomment lines of code by pressing the &quot;Cntrl+/&quot; shortcut key sequence. In Spyder I was unable to find an equivalent shortcut key in the introductory tutorial.

Is there a shortcut key for commenting and uncommenting code in Spyder?

Shortcut key for commenting out lines of Python code in Spyder

I&#39;m trying a demo on vuejs. Now I want the html title to bind a vm field.

The below is what I tried:

`index.html`

    &lt;!DOCTYPE html&gt;
    &lt;html id=&quot;html&quot;&gt;
    &lt;head&gt;
        &lt;title&gt;{{ hello }}&lt;/title&gt;
        &lt;script src=&quot;lib/requirejs/require.min.js&quot; data-main=&quot;app&quot;&gt;&lt;/script&gt;
    &lt;/head&gt;
    &lt;body&gt;
    {{ hello }}
    &lt;input v-model=&quot;hello&quot; title=&quot;hello&quot; /&gt;
    &lt;/body&gt;
    &lt;/html&gt;

`app.js`

    define([
        &#39;jquery&#39;, &#39;vue&#39;
    ], function ($, Vue) {
        var vm = new Vue({
            el: &#39;html&#39;,
            data: {
                hello: &#39;Hello world&#39;
            }
        });
    });

But the title seemed not bounded, how to make it work?

How can I bind the html &lt;title&gt; content in vuejs?

	cmake --build . --config Release

Is it possible to set the number of cores to be used by the build process?

I&#39;m looking for something similar to GNU make&#39;s `-j` option.


Set the number of threads in a CMake build

<pre><code class="hljs language-css">cmake --build . --config Release
</code></pre>
Is it possible to set the number of cores to be used by the build process?
I'm looking for something similar to GNU make's <code>-j</code> option.

I&#39;ve come across at least 3 ways to do this and I&#39;m wondering which is the idiomatic way.  This needs to be done almost universally to any static library.  I&#39;m surprised that the Makefile generator in CMake doesn&#39;t automatically add this to static libraries.  (unless I&#39;m missing something?)

    target_compile_options(myLib PRIVATE -fPIC)
    
    add_compile_options(-fPIC)
    
    set(CMAKE_C_FLAGS &quot;${CMAKE_C_FLAGS} -fpic&quot;)
    set(CMAKE_CXX_FLAGS &quot;${CMAKE_CXX_FLAGS} -fpic&quot;)

I believe there might also be other variations. (please edit my question if you find one)

If you happen to know the answer to this question, do you also know if there is a way to cause a 3rd party CMake project to be compiled with this flag without modifying its CMakeLists.txt file?  I have run across static libraries missing that flag.  It causes problems when compiling a static library into a dynamic library. 

You get:

    relocation R_X86_64_32 against `.rodata&#39; can not be used when making a shared object; recompile with -fPIC



What is the idiomatic way in CMAKE to add the -fPIC compiler option?

I can&#39;t get the additional libraries I am working with to link into my project properly.

I am using CLion, which uses cmake to build it&#39;s projects. I am trying to use several libraries in conjunction with OpenGL to texture some objects. I initially built it in Visual Studio, because I couldn&#39;t ever figure out how to get cmake to work with Clion. However, now that the code is all working (in Visual Studio, anyways), I want to be able to use CLion for it, because that is my preferred IDE.

I am still new to cmake, and I don&#39;t understand what I am doing wrong with my `CMakeLists.txt`. Here is what I have:

    cmake_minimum_required(VERSION 3.3)
    project(texture_mapping)
    find_package(OpenGL REQUIRED)
    link_directories(${OPENGL_gl_LIBRARY})
    
    set(CMAKE_CXX_FLAGS &quot;${CMAKE_CXX_FLAGS} -std=c++11&quot;)
    
    set(SOURCE_FILES main.cpp camera.h display.h display.cpp mesh.cpp mesh.h obj_loader.cpp obj_loader.h shader.cpp shader.h stb_image.c stb_image.h texture.cpp texture.h transform.h)
    
    link_directories(texture_mapping ${PROJECT_SOURCE_DIR}/lib)
    
    add_executable(texture_mapping ${SOURCE_FILES})
    
    target_include_directories(texture_mapping PUBLIC ${PROJECT_SOURCE_DIR}/include)
    target_link_libraries(texture_mapping SDL2 SDL2main SDL2test glew32 glew32s ${OPENGL_gl_LIBRARY})

I tweaked it until it didn&#39;t give me any more errors in CLion, but the header files are still not recognized in my code.

Here is the structure of my project:  
[![project structure][1]][1]

So, I put all of the libraries I needed, but it doesn&#39;t appear to be recognizing them in the code. Clion recognizes them in the project (they aren&#39;t appearing red with errors), but when it is built (when I attempt to run it in CLion), I get these errors:

    CMakeFiles\texture_mapping.dir/objects.a(mesh.cpp.obj): In function `ZN4MeshD2Ev&#39;:
    ...texture-mapping/mesh.cpp:30: undefined reference to `_imp____glewDeleteVertexArrays&#39;
    CMakeFiles\texture_mapping.dir/objects.a(mesh.cpp.obj): In function `ZN4Mesh8InitMeshERK12IndexedModel&#39;:
    ...texture-mapping/mesh.cpp:36: undefined reference to `_imp____glewGenVertexArrays&#39;
    ...texture-mapping/mesh.cpp:37: undefined reference to `_imp____glewBindVertexArray&#39;
    ...texture-mapping/mesh.cpp:39: undefined reference to `_imp____glewGenBuffers&#39;
    ...texture-mapping/mesh.cpp:40: undefined reference to `_imp____glewBindBuffer&#39;
    ...texture-mapping/mesh.cpp:41: undefined reference to `_imp____glewBufferData&#39;
    ...texture-mapping/mesh.cpp:43: undefined reference to `_imp____glewEnableVertexAttribArray&#39;
    ...texture-mapping/mesh.cpp:44: undefined reference to `_imp____glewVertexAttribPointer&#39;
    ...texture-mapping/mesh.cpp:46: undefined reference to `_imp____glewBindBuffer&#39;
    ...texture-mapping/mesh.cpp:47: undefined reference to `_imp____glewBufferData&#39;
    ...texture-mapping/mesh.cpp:49: undefined reference to `_imp____glewEnableVertexAttribArray&#39;
    ...texture-mapping/mesh.cpp:50: undefined reference to `_imp____glewVertexAttribPointer&#39;
    ...texture-mapping/mesh.cpp:52: undefined reference to `_imp____glewBindBuffer&#39;
    ...texture-mapping/mesh.cpp:53: undefined reference to `_imp____glewBufferData&#39;
    ...texture-mapping/mesh.cpp:55: undefined reference to `_imp____glewBindVertexArray&#39;
    ...texture-mapping/mesh.cpp:56: undefined reference to `_imp____glewBindVertexArray&#39;
    CMakeFiles\texture_mapping.dir/objects.a(mesh.cpp.obj): In function `ZN4Mesh4DrawEv&#39;:
    ...texture-mapping/mesh.cpp:61: undefined reference to `_imp____glewBindVertexArray&#39;
    ...texture-mapping/mesh.cpp:65: undefined reference to `_imp____glewBindVertexArray&#39;
    CMakeFiles\texture_mapping.dir/objects.a(shader.cpp.obj): In function `ZN6ShaderC2ERKSs&#39;:
    ...texture-mapping/shader.cpp:5: undefined reference to `_imp____glewCreateProgram&#39;
    ...texture-mapping/shader.cpp:11: undefined reference to `_imp____glewAttachShader&#39;
    ...texture-mapping/shader.cpp:14: undefined reference to `_imp____glewBindAttribLocation&#39;
    ...texture-mapping/shader.cpp:15: undefined reference to `_imp____glewBindAttribLocation&#39;
    ...texture-mapping/shader.cpp:17: undefined reference to `_imp____glewLinkProgram&#39;
    ...texture-mapping/shader.cpp:20: undefined reference to `_imp____glewValidateProgram&#39;
    ...texture-mapping/shader.cpp:23: undefined reference to `_imp____glewGetUniformLocation&#39;
    CMakeFiles\texture_mapping.dir/objects.a(shader.cpp.obj): In function `ZN6Shader4BindEv&#39;:
    ...texture-mapping/shader.cpp:28: undefined reference to `_imp____glewUseProgram&#39;
    CMakeFiles\texture_mapping.dir/objects.a(shader.cpp.obj): In function `ZN6Shader6UpdateERK9TransformRK6Camera&#39;:
    ...texture-mapping/shader.cpp:35: undefined reference to `_imp____glewUniformMatrix4fv&#39;
    CMakeFiles\texture_mapping.dir/objects.a(shader.cpp.obj): In function `ZN6ShaderD2Ev&#39;:
    ...texture-mapping/shader.cpp:42: undefined reference to `_imp____glewDetachShader&#39;
    ...texture-mapping/shader.cpp:43: undefined reference to `_imp____glewDeleteShader&#39;
    ...texture-mapping/shader.cpp:46: undefined reference to `_imp____glewDeleteProgram&#39;
    CMakeFiles\texture_mapping.dir/objects.a(shader.cpp.obj): In function `ZN6Shader16CheckShaderErrorEjjbRKSs&#39;:
    ...texture-mapping/shader.cpp:79: undefined reference to `_imp____glewGetProgramiv&#39;
    ...texture-mapping/shader.cpp:81: undefined reference to `_imp____glewGetShaderiv&#39;
    ...texture-mapping/shader.cpp:86: undefined reference to `_imp____glewGetProgramInfoLog&#39;
    ...texture-mapping/shader.cpp:88: undefined reference to `_imp____glewGetShaderInfoLog&#39;
    CMakeFiles\texture_mapping.dir/objects.a(shader.cpp.obj): In function `ZN6Shader12CreateShaderERKSsj&#39;:
    ...texture-mapping/shader.cpp:96: undefined reference to `_imp____glewCreateShader&#39;
    ...texture-mapping/shader.cpp:109: undefined reference to `_imp____glewShaderSource&#39;
    ...texture-mapping/shader.cpp:110: undefined reference to `_imp____glewCompileShader&#39;
    CMakeFiles\texture_mapping.dir/objects.a(texture.cpp.obj): In function `ZN7Texture4BindEj&#39;:
    ...texture-mapping/texture.cpp:36: undefined reference to `_imp____glewActiveTexture&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x24): undefined reference to `SDL_SetMainReady&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x55): undefined reference to `SDL_malloc&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x84): undefined reference to `SDL_wcslen&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0xa5): undefined reference to `SDL_iconv_string&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0xcf): undefined reference to `SDL_free&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0xf4): undefined reference to `SDL_wcslen&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x10f): undefined reference to `SDL_iconv_string&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x143): undefined reference to `SDL_malloc&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x17f): undefined reference to `SDL_free&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x18b): undefined reference to `SDL_free&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x1d6): undefined reference to `SDL_isspace&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x295): undefined reference to `SDL_isspace&#39;
    ...texture-mapping/lib/SDL2main.lib(./Win32/Release/SDL_windows_main.obj):(.text+0x3a2): undefined reference to `SDL_ShowSimpleMessageBox&#39;

Basically, errors with every usage of SDL and glew, but not glm, which is strange.

What am I doing wrong with my `CMakeLists.txt`?

  [1]: http://i.stack.imgur.com/Bp3No.png

How to properly link libraries with cmake?

I need to add C/C++ code in my Android program for which I needed LLDB, CMake, and NDK. I found LLDB and NDK in SDK manager, but CMake is missing from there. I tried manually downloading it from the CMake official site and found out that for Android we need SDK customized CMake.

[![Enter image description here][1]][1]

As you can see there is no option such as CMake.

Where do I find a version of CMake for Android?

I have tried CMake from the website and one I found in ndk-bundle/build folder, but both are giving the same error as below. What can be made out of it and how can the issue be solved?

    Build command failed.

    Error while executing &#39;C:\Users\amishr33\AppData\Local\Android\sdk\cmake\bin\cmake.exe&#39; with arguments {-HC:\Users\amishr33\AndroidStudioProjects\MyApplication\app\src\main\jni -BC:\Users\amishr33\AndroidStudioProjects\MyApplication\app\.externalNativeBuild\cmake\debug\armeabi -GAndroid Gradle - Ninja -DANDROID_ABI=armeabi -DANDROID_NDK=C:\Users\amishr33\AppData\Local\Android\sdk\ndk-bundle -DCMAKE_LIBRARY_OUTPUT_DIRECTORY=C:\Users\amishr33\AndroidStudioProjects\MyApplication\app\build\intermediates\cmake\debug\obj\armeabi -DCMAKE_BUILD_TYPE=Debug -DCMAKE_MAKE_PROGRAM=C:\Users\amishr33\AppData\Local\Android\sdk\cmake\bin\ninja.exe -DCMAKE_TOOLCHAIN_FILE=C:\Users\amishr33\AppData\Local\Android\sdk\ndk-bundle\build\cmake\android.toolchain.cmake -DANDROID_NATIVE_API_LEVEL=15 -DCMAKE_CXX_FLAGS=-std=c++11 -DANDROID_TOOLCHAIN=clang -DANDROID_STL=gnustl_static}
    CMake Error: Could not create named generator Android Gradle - Ninja
    Generators
      Visual Studio 15 2017 [arch] = Generates Visual Studio 2017 project files.
                                     Optional [arch] can be &quot;Win64&quot; or &quot;ARM&quot;.
      Visual Studio 14 2015 [arch] = Generates Visual Studio 2015 project files.
                                     Optional [arch] can be &quot;Win64&quot; or &quot;ARM&quot;.
      Visual Studio 12 2013 [arch] = Generates Visual Studio 2013 project files.
                                     Optional [arch] can be &quot;Win64&quot; or &quot;ARM&quot;.
      Visual Studio 11 2012 [arch] = Generates Visual Studio 2012 project files.
                                     Optional [arch] can be &quot;Win64&quot; or &quot;ARM&quot;.
      Visual Studio 10 2010 [arch] = Generates Visual Studio 2010 project files.
                                     Optional [arch] can be &quot;Win64&quot; or &quot;IA64&quot;.
      Visual Studio 9 2008 [arch]  = Generates Visual Studio 2008 project files.
                                     Optional [arch] can be &quot;Win64&quot; or &quot;IA64&quot;.
      Visual Studio 8 2005 [arch]  = Generates Visual Studio 2005 project files.
                                     Optional [arch] can be &quot;Win64&quot;.
      Visual Studio 7 .NET 2003    = Deprecated.  Generates Visual Studio .NET
                                     2003 project files.
      Borland Makefiles            = Generates Borland makefiles.
      NMake Makefiles              = Generates NMake makefiles.
      NMake Makefiles JOM          = Generates JOM makefiles.
      Green Hills MULTI            = Generates Green Hills MULTI files
                                     (experimental, work-in-progress).
      MSYS Makefiles               = Generates MSYS makefiles.
      MinGW Makefiles              = Generates a make file for use with
                                     mingw32-make.
      Unix Makefiles               = Generates standard UNIX makefiles.
      Ninja                        = Generates build.ninja files.
      Watcom WMake                 = Generates Watcom WMake makefiles.
      CodeBlocks - MinGW Makefiles = Generates CodeBlocks project files.
      CodeBlocks - NMake Makefiles = Generates CodeBlocks project files.
      CodeBlocks - Ninja           = Generates CodeBlocks project files.
      CodeBlocks - Unix Makefiles  = Generates CodeBlocks project files.
      CodeLite - MinGW Makefiles   = Generates CodeLite project files.
      CodeLite - NMake Makefiles   = Generates CodeLite project files.
      CodeLite - Ninja             = Generates CodeLite project files.
      CodeLite - Unix Makefiles    = Generates CodeLite project files.
      Sublime Text 2 - MinGW Makefiles
                                   = Generates Sublime Text 2 project files.
      Sublime Text 2 - NMake Makefiles
                                   = Generates Sublime Text 2 project files.
      Sublime Text 2 - Ninja       = Generates Sublime Text 2 project files.
      Sublime Text 2 - Unix Makefiles
                                   = Generates Sublime Text 2 project files.
      Kate - MinGW Makefiles       = Generates Kate project files.
      Kate - NMake Makefiles       = Generates Kate project files.
      Kate - Ninja                 = Generates Kate project files.
      Kate - Unix Makefiles        = Generates Kate project files.
      Eclipse CDT4 - NMake Makefiles
                                   = Generates Eclipse CDT 4.0 project files.
      Eclipse CDT4 - MinGW Makefiles
                                   = Generates Eclipse CDT 4.0 project files.
      Eclipse CDT4 - Ninja         = Generates Eclipse CDT 4.0 project files.
      Eclipse CDT4 - Unix Makefiles= Generates Eclipse CDT 4.0 project files.
    Error:executing external native build for cmake C:\Users\amishr33\AndroidStudioProjects\MyApplication\app\src\main\jni\CMakeLists.txt

  [1]: https://i.stack.imgur.com/1LqqS.png



Unable to find CMake in Android Studio

I have a C++ project which uses CMake as its build system. I&#39;d like the following behavior:

If cmake is invoked as `cmake ..`, then `CMAKE_CXX_FLAGS` is `-O3 -Wall -Wextra`

If cmake is invoked as `cmake .. -DCMAKE_BUILD_TYPE=Debug`, then `CMAKE_CXX_FLAGS` is `-g -Wall -Wextra`

I tried the following

    message(STATUS &quot;Build type: ${CMAKE_BUILD_TYPE}&quot;)
    
    set(CMAKE_CXX_FLAGS &quot;-O3 -Wall -Wextra&quot;)
    set(CMAKE_CXX_FLAGS_DEBUG &quot;-g -Wall -Wextra&quot;)

But this has a big problem. First of all, if the second invocation is used, then both `-O3` and `-g` flags are passed to the compiler. Besides, if I use the second invocation and the first thereafter, `CMAKE_BUILD_TYPE` stays `Debug` although not explicitly ordered so - so I get a Debug build although I want an optimized build.

Why? What can I do to get the desired behavior?

Optimize in CMake by default

I am trying to find some `sudo`-free solution to enable my users install and unistall my application. Using

    set(CMAKE_INSTALL_PREFIX &quot;$ENV{HOME}/opt/${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}/&quot;)
    SET(CMAKE_INSTALL_RPATH &quot;$ENV{HOME}/${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}/&quot;)

I can direct the files to the user&#39;s home directory, and

    make install

works fine. With reference to 
https://stackoverflow.com/questions/1439950/whats-the-opposite-of-make-install-ie-how-do-you-uninstall-a-library-in-lin
I did not find any idea, which is `sudo`-free and is not complex for a non-system-admin person. 

1. Is anyhow `make uninstall` supported by CMake?

2. My uninstall is quite simple: all files go in a subdirectory of the user&#39;s home. In principle, removed that new subdirectory could solve the problem. Has `make install`, with parameters above, any side effect, or I can write in my user&#39;s guide that the newly produced subdirectory can be removed as &#39;uninstall&#39;?


Content Type	Original Author	Original Content on Stackoverflow
Question	Konstantin Burlachenko	View Question on Stackoverflow
Solution 1 - Cmake	usr1234567	View Answer on Stackoverflow
Solution 2 - Cmake	usr1234567	View Answer on Stackoverflow

Set the number of threads in a CMake build

Cmake Problem Overview

Cmake Solutions

Solution 1 - Cmake

Solution 2 - Cmake

How can I bind the html <title> content in vuejs?

Shortcut key for commenting out lines of Python code in Spyder

Attributions