The option `YAML_CPP_BUILD_TESTS` currently enables or disables building of tests; but unconditionally the CMake file includes CTest; this PR makes that conditional on the option.
Also, there is no option for enabling formatting, but it does check whether it can find the `clang-format` executable; this PR adds an option (default to true) that skips even looking for the executable if disabled.
After configuring the file `yaml-cpp-config.cmake.in`, the result ends up with
empty variables. (see also the discussion in #774).
Rework this file and the call to `configure_package_config_file` according the
cmake documentation
(https://cmake.org/cmake/help/v3.22/module/CMakePackageConfigHelpers.html?highlight=configure_package_config#command:configure_package_config_file)
to overcome this issue and allow a simple `find_package` after install.
As there was some discussion about the place where to install the
`yaml-cpp-config.cmake` file, e.g. #1055, factor out the install location into
an extra variable to make it easier changing this location in the future.
Also untabify CMakeLists.txt in some places to align with the other code parts in this file.
Add copying of shared library to the output directory with a test binary.
[binary] removed using of non unsigned char as argument at
'std::isspace' function that was provokes undefined behavior.
[.github/workflows/build.yml] enabled run of test at the
'windows-latest' environment.
GNUInstallDirs provided may be absolute paths, in which case appending
to the install prefix is not correct. We can instead use the provided
CMAKE_INSTALL_FULL_* variables, which are precomputed absolute paths.
https://cmake.org/cmake/help/latest/module/GNUInstallDirs.html
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