![cmake generator cmake generator](https://preshing.com/images/cmake-variable-scopes.png)
- Cmake generator install#
- Cmake generator generator#
- Cmake generator update#
- Cmake generator software#
- Cmake generator code#
Cmake sees that it is not there (when Cmake is running, that is) and complains. My C++ static library project has a pre-build step runs a custom tool on a file named “a” to produce an output named “myfile.c” The “myfile.c” is supposed to be compiled into the static library.īut even after trying your approach, any attempt to reference that generated file “myfile.c” in the subsequent add_library() statement (for the static library) fails completely. This looks to be exactly what I want but unfortunately none of this works for the static library I’m trying to build. I stumbled across this trying to solve this very problem when porting a C++ project to Linux.
Cmake generator generator#
Alternatively, if the generator can be factored out into its own project, a more traditional superbuild approach using ExternalProject may be another alternative. Handling this sort of scenario requires more complicated techniques, with one effective solution being documented here. If the generator is built by the project, a chicken-and-egg situation results. A generator may produce a CMakeLists.txt file, for example, which means the generator has to exist at configure time before any build has been performed. One scenario not covered in the above is where one of the files being generated is a file read in by CMake as part of the configure stage. This lets CMake handle dependencies between the tool and the generation steps as well as being more suitable for parallel builds (in comparison, the configure stage is inherently non-parallel).
![cmake generator cmake generator](https://preshing.com/images/cmake-generators.png)
It supports directory hierarchies and applications that depend on. 3 CMake is not a build system itself it generates another systems build files.
Cmake generator software#
Generating source files at build time is preferable where the generation is expensive or where it requires a tool that is itself built as part of the project. In software development, CMake is cross-platform free and open-source software for build automation, testing, packaging and installation of software by using a compiler -independent method.
![cmake generator cmake generator](https://www.incredibuild.com/wp-content/uploads/2021/02/CMake-generator-2-768x271.jpg)
The main drawback to a configure-time copy is that if the configure stage is not fast, re-running CMake every time the input file changes can be annoying. If the file contents can be generated at configure time, this is often the simplest approach. The most effective way to generate content to be used as source files depends on a number of factors. The configure_file() command makes this trivial and even has the ability to transform the input such that $/generated.cpp
![cmake generator cmake generator](http://i.stack.imgur.com/chsQx.jpg)
The easiest scenario involves copying a file from somewhere into a known location during the configure stage and using it as a source or header file in the build stage. CMake provides a range of functionality which can be used to create files, but getting build dependencies correct is an area where many developers struggle or even simply give up. This is relatively easy with CMake, but things get more interesting when some of the source files need to be generated as part of the build. In some scenarios, the performance hit of file system interactions on some platforms matters, but I doubt it does here for you, so I’d go with the first approach for simplicity.Using a set of source files to build libraries and executables is about the most basic thing a build system needs to do. ( Edit: that statement was incorrect, the timestamp doesn’t get updated if contents don’t change) It’s a few more lines, but achieves the same result as the first example above without writing any intermediate file. If that mattered, you could first read in the destination file if it exists and compare that to the contents you want to write and then only overwrite the existing file if the contents don’t match (or if there is no existing destination file). The inclusion of conanbuildinfo.cmake doesn’t alter the CMake environment at all. You can include conanbuildinfo.cmake in your project’s CMakeLists.txt to manage your requirements.
Cmake generator code#
I will add some code to CVS CMake to do this, but I may not get to it for a. We should, of course, prefer the most recent VS available as the default.
Cmake generator update#
Looks like that block of code forgot to update itself when Visual.
Cmake generator install#
The above always writes to the destination file and therefore always updates its timestamp. When conan install is executed, a file named conanbuildinfo.cmake is created. Line 2009 of CMake/Source/cmake.cxx chooses the default Visual Studio. This file is DeployOnWindows.cmake: execute_process(ĬOMMAND -dry-run -no-compiler-runtime -listĪnd in the main CMakeLists.txt I have something like: # ) to package an application.įor clarity of where my problem comes from, I was trying to run windeployqt.exe myapp.exe from the script. So, I was trying to do a script to pass to install(SCRIPT.