MSVC runtime libraries are installed on Windows

[cottsay]

Environment

• OS Version: Windows 10
• Source or binary build?
  44a699c

    ...
    -- Install configuration: "Release"
    -- Installing: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin/msvcp140.dll
    -- Installing: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin/msvcp140_1.dll
    -- Installing: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin/msvcp140_2.dll
    -- Installing: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin/msvcp140_atomic_wait.dll
    -- Installing: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin/msvcp140_codecvt_ids.dll
    -- Installing: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin/vcruntime140_1.dll
    -- Installing: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin/vcruntime140.dll
    -- Installing: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin/concrt140.dll
    -- Up-to-date: C:/ci/ws/build/ignition_cmake2_vendor/ignition_cmake2_vendor_install/bin
    ...

Description

• Expected behavior: No binary files are installed by this package
• Actual behavior: MSVC runtime libraries are installed by this package

Steps to reproduce

1. Build on Windows
2. Install on Windows
3. Observe the list of operations performed during install

[traversaro]

To avoid that, in conda-forge recipes we pass the CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP option, see https://github.com/conda-forge/libignition-math4-feedstock/blob/31df1d0d6d4f6d372061a8e4ce45d5923468a5f4/recipe/bld.bat#L8 .

[traversaro]

Note that this is due to https://github.com/ignitionrobotics/ign-cmake/blob/c34873d6c6bb301d5a865497483f4399d84c28b8/cmake/IgnPackaging.cmake#L58 .