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59 lines
2.8 KiB
Markdown
59 lines
2.8 KiB
Markdown
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# Example (JKQTPlotter): CMake Example {#JKQTCMakeLinkExample}
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This project (see [`cmake_link_example`](https://github.com/jkriege2/JKQtPlotter/tree/master/examples/cmake_link_example) demonstrates how to link against JKQTPlotter using CMake. See http://jkriege2.github.io/JKQtPlotter/page_buildinstructions.html for details on how to build JKQTPlotter with CMake
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This example uses very simple code, which simply displays a plotter and shows some data. The important part of this example is the ´CMakeLists.txt`-file:
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```
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# set minimum required CMake-Version
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cmake_minimum_required(VERSION 3.0)
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# set Project name
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set(EXAMPLE_NAME simpletest)
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set(EXENAME jkqtptest_${EXAMPLE_NAME})
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project(${EXAMPLE_NAME} LANGUAGES CXX)
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# some basic configurations
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set(CMAKE_AUTOMOC ON)
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set(CMAKE_AUTORCC ON)
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set(CMAKE_AUTOUIC ON)
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set(CMAKE_INCLUDE_CURRENT_DIR ON)
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set(CMAKE_CXX_STANDARD 11)
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set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
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# Configure project for usage of Qt5
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find_package(Qt5 5.12 REQUIRED Core Gui Widgets PrintSupport Svg Xml OpenGl)
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# include JKQTPlotter
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find_package(JKQTCommonLib)
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find_package(JKQTMathTextLib)
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find_package(JKQTPlotterLib)
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# For Visual Studio, we need to set some additional compiler options
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if(MSVC)
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add_compile_options(/EHsc)
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# To enable M_PI, M_E,...
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add_definitions(/D_USE_MATH_DEFINES)
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# To Prevent Errors with min() and max()
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add_definitions(/DNOMINMAX)
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# To fix error: C2338: va_start argument must not
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# have reference type and must not be parenthesized
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add_definitions(/D_CRT_NO_VA_START_VALIDATION)
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endif()
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# add the example executable
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add_executable(${EXENAME} WIN32 simpletest.cpp)
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# ... and link against JKQTPlotterLib
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# (you could use JKQTPlotterSharedLib if you don't want to link againast the
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# static version, but against the shared/DLL version).
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target_link_libraries(${EXENAME} JKQTPlotterLib)
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```
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To build this example, you first need to make a subdirectory `build` and then call CMake form that subdirectory:
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```.sh
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$ mkdir build
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$ cd build
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$ cmake .. -G "<GENERATOR>" "-DCMAKE_PREFIX_PATH=<path_to_your_qt_sources> -DCMAKE_MODULE_PATH=<path_to_lib/cmake_dir_of_JKQTPLOTTER>"
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```
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The you can use the generated makefiles (e.g. load them in an editor, or build them jsing `make`). In the last line above, you need to specify two directories:
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- `<path_to_your_qt_sources>` points to you Qt installation
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- `<path_to_lib/cmake_dir_of_JKQTPLOTTER>` points to the directory containing the `XYZ.cmake`-files from the JKQTPlotter build. Typically this is `<JKQTPLOTTER_INSTALL_DIR>/lib/cmake`, where `<JKQTPLOTTER_INSTALL_DIR>` is the directory into which you installed JKQTPlotter.
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