USE_SOURCE_PERMISSIONS FILES_MATCHING PATTERN "*. If it can, then we have succeeded in adding TBB as a dependency in our project.
We then use CMake's module CheckIncludeFileCXX to have CMake test whether it can include the tbb/tbb.h header file in code and compile it. It is only useful if you want to see how stuff works. It can take very long and isn't recommended for regular use. Any following targets that need to be built usign ExternalProject_Step are also built. This CMAKELIBRARYPATH technique will affect all findlibrary commands after you set the variable.
It will then compile the source and all its dependencies that are specified. Add /opt/local/lib, and any other likely install paths, to the set of paths searched by cmake in your CMakeLists.txt file: This appends /opt/local/lib to the set of paths in which cmake searches for libraries. The number of CPUs can be modified by editing the NCPU variable in the file. The ExternalProject_Add will uncompress the TBB source file we downloaded earlier and compile it using as many CPU cores as available in your system. We also add the sub-projects in TBB that are required in the file using ExternalProject_Step. We add the TBB project using the ExternalProject_Add command to the CMake uses scripts (called CMakeLists.txt) to generate environment specific build files, such as Visual Studio projects, XCode projects, make scripts and others. The best way to verify this works is to first test it on Linux or MacOS. CMake is a cross-platform open-source tool for defining the build process for native applications independently of compilers and environments. NOTE: To build TBB on Windows requires GNU Make or gmake installed and in the PATH or set it in the TBB_MAKE variable.
The details of each of these functions can be viewed in the CMake manual or using the command man cmake on your terminal. To build the TBB source, we have to use the CMake functions provided by the ExternalProject module, viz., ExternalProject_Add, ExternalProject_Get_Property and ExternalProject_Add_Step. TBB is a C++ library, hence our example will be with C++ source.
Below we demonstrate how to download the latest source from the TBB website, and how to use features present in CMake to make sure that the project gets compiled and ready to use in your project.
In this blog post we demonstrate how to use CMake to build a large toolkit like Intel® Threading Building Blocks (TBB).Īlthough TBB might be available in your Linux operating system's package manager, sometimes you may want to compile the latest version from source using a different compiler like Intel's C Compiler ( icc) instead of GNU C Compiler ( gcc), or you're building software that runs on both Linux and Windows, and you don't want to use a pre-built version of TBB from Intel.ĬMake has a module called ExternalProject that can do this for you. As a longtime user of CMake we have written build systems for large and complex projects in it that also build Java and C# wrappers, or use it for auto-generating cross-platform C/C++ code using Perl. The most common use of CMake is to build projects that are written in C, C++ or both. It has its own domain specific language and various modules for most commonly used libraries and software frameworks. The CXX compiler identification is GNU 7.5.CMake is an excellent cross-platform build tool for automatically generating Unix Makefiles, Windows NMake Makefiles, Microsoft Visual Studio® Solution projects or Apple Xcode® projects for MacOS. The C compiler identification is GNU 7.5.0 Message(FATAL_ERROR "No QT5 framework found") Option(BUILD_SHARED_LIBS "Build shared libraries" OFF) I only want to use Qt's installer since it gives me the flexibility of having multiple versions targeting multiple frameworks. Note that I do not want to install Qt using apt or any other package manager. This way I would always end with a huge command and it's a major source of annoyance. cmake files which I need to pass their paths one by one using _DIR variables. The only alternative I found to work was passing -DQt5_DIR for QtConfig.cmake to be found, but then it would keep on asking for at least 10 more. I tried pointing CMAKE_PREFIX_PATH to Qt's installation prefix (~/Qt/5.15.0/wasm_32/), but it keeps on complaining about QtConfig.cmake. It doesn't work neither on MacOS nor on Linux. So far, I found that detection of Qt's components only works on Windows, regardless whether I'm using it to compile a Windows version or cross-compiling to Android.
I'm compiling the same Qt/QML application on Windows, Linux, MacOS, WebAssembly, iOS, and Android.