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https://github.com/andreicherniaev/cmake_variable_to_code
export CMake variable to C++ code example
https://github.com/andreicherniaev/cmake_variable_to_code
cmake example qt
Last synced: about 1 month ago
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export CMake variable to C++ code example
- Host: GitHub
- URL: https://github.com/andreicherniaev/cmake_variable_to_code
- Owner: AndreiCherniaev
- Created: 2024-04-19T19:44:08.000Z (9 months ago)
- Default Branch: main
- Last Pushed: 2024-07-25T06:23:18.000Z (6 months ago)
- Last Synced: 2024-07-25T07:30:05.142Z (6 months ago)
- Topics: cmake, example, qt
- Language: C++
- Homepage: https://forum.qt.io/post/797532
- Size: 7.81 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
This is export CMake variable to C++ code example. I also use Qt but it is not a main point. There are two ways: use [add_compile_definitions](https://cmake.org/cmake/help/latest/command/add_compile_definitions.html) or use [configure_file](https://cmake.org/cmake/help/latest/guide/tutorial/A%20Basic%20Starting%20Point.html#exercise-3-adding-a-version-number-and-configured-header-file) (better).
# add_compile_definitions way
1. Inside CMakeLists.txt any project has something like
```
project(CMake_variable_to_code LANGUAGES CXX C DESCRIPTION "export CMake variable to C++ code example" VERSION 1.0.0.0)
```
2. Somewhere inside CMakeLists.txt you should add
```
add_compile_definitions(MYPROJECT_NAME=${PROJECT_NAME})
add_compile_definitions(MYPROJECT_DESCRIPTION=${PROJECT_DESCRIPTION})
add_compile_definitions(CMAKE_PROJECT_VERSION=${CMAKE_PROJECT_VERSION})
```
3. Then in C++ code you should add
```
#define Q(x) #x
#define QUOTE(x) Q(x)
```
4. Now you can use CMake's variables inside C++ code. For example
```
QCoreApplication::setApplicationName(QUOTE(MYPROJECT_NAME));
QCoreApplication::setApplicationVersion(QUOTE(CMAKE_PROJECT_VERSION));
```
See also my feature [request](https://bugreports.qt.io/browse/QTBUG-123649) for Qt project.
## Compiling
```
git clone https://github.com/AndreiCherniaev/CMake_variable_to_code.git && cd "CMake_variable_to_code/add_compile_definitions_way"
rm -rf build-host && mkdir build-host/
cmake -S src/ -B build-host/
cmake --build build-host/ --parallel
```
## Test
```
build-host/CMake_variable_to_code --version
CMake_variable_to_code 1.0.0.0
```
```
build-host/CMake_variable_to_code --help
Usage: build-host/CMake_variable_to_code [options]
export CMake variable to C++ code example
Options:
-h, --help Displays help on commandline options.
--help-all Displays help, including generic Qt options.
-v, --version Displays version information.
```
# configure_file way
## Compiling
```
cd "CMake_variable_to_code/configure_file_way"
rm -rf build-host && mkdir build-host/
cmake -S src/ -B build-host/
cmake --build build-host/ --parallel
```
## Test
```
build-host/CMake_variable_to_code --version
CMake_variable_to_code 1.0.0.0
```
```
build-host/CMake_variable_to_code --help
Usage: build-host/CMake_variable_to_code [options]
export CMake variable to C++ code example
Options:
-h, --help Displays help on commandline options.
--help-all Displays help, including generic Qt options.
-v, --version Displays version information.
```