"add_custom_command()" does not work properly with Visual Studio Generator for CMake
I have been following the examples in the "CMake Cookbook" by Radovan Bast and Roberto Di Remigio and came across one example that doesn't appear to work right on Windows.
The source code for this example can be found here: https://github.com/dev-cafe/cmake-cookbook/tree/master/chapter-06/recipe-07
Chapter-06/Recipe-07 is supposed to update the Git commit hash referenced by the version header file every time the project is built. According to the book, "add_custom_command()" is supposed to execute on every build regardless of whether any files are changed. This example seems to work correctly in a Linux environment, but not in Windows with the Visual Studio Generator. When a new commit is created (an empty commit created with "git commit --allow-empty") the custom command is never called and the commit hash is not updated correctly.
For specific instructions to reproduce the issue, see this bug report I opened for the example in the book: https://github.com/dev-cafe/cmake-cookbook/issues/506
I assumed this was an issue with the example, but it looks like the Visual Studio Generator may not be handling "add_custom_command()" correctly and is the source of the problem.
- CMake version 3.13.3
- Windows 10
- Visual Studio 2017