![]() ![]() This method is therefore useful if many support libraries are installed into the same location. If your application requires a customized setting, the following CMakeLists.txt demonstrates how to achieve a more fine-grained control. CMake will check these directories for any package it requires. Command line Source the oneAPI setvars.sh script beforehand build cmake. If any support libraries are installed in non-default locations, CMake can be instructed where to find them by one of the following methods. First, the option CMAKE_PREFIX_PATH can be set to a colon-separated list of base directories where the libraries are installed, for example -DCMAKE_PREFIX_PATH=/path/where/my/sw/is/installed. For example, using CMAKE_CXX_FLAGS="-O2 -mtune=native" sets options for better optimisation. Instructions in the CMake file could be using targetsources () for a known target. With targetsources you can do this: addlibrary (sometarget main.cpp) addsubdirectory (subdir) sometarget will now contain both source files. ![]() Say you have rootdir and rootdir/subdir and source files in both. The system used to build the software will be called the build host, and the system for which the software is built will be called the target system or target platform. Since CMake 3.1 there is a new way to add source from subdirectories: targetsources. Then you can just include () this generated CMake file. Cross-compiling a piece of software means that the software is built on one system, but is intended to run on a different system. Further the variable CMAKE_CXX_FLAGS can be used to set compiler flags for optimisation or debugging. What you can do for large or shared projects is use a script, that could be created by anything that can scan the filesystem or some other repository, to generate a CMake file that lists the source files. This can be overwritten by setting the environment variables CC, CXX and F77, before the call to cmake, to set the preferred compiler. The C, C++ and Fortran compilers are chosen by CMake. Additional flags to pass to the C++ compilerĪdditional flags to pass to the C compilerĪdditional flags to pass to the Fortran compiler ![]()
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