Antonio Sanchez 7571704a43 Fix CMake directory issues. ...

Allows absolute and relative paths for
- `INCLUDE_INSTALL_DIR`
- `CMAKEPACKAGE_INSTALL_DIR`
- `PKGCONFIG_INSTALL_DIR`

Type should be `PATH` not `STRING`.  Contrary to !211, these don't
seem to be made absolute if user-defined - according to the doc any
directories should use `PATH` type, which allows a file dialog
to be used via the GUI.  It also better handles file separators.

If user provides an absolute path, it will be made relative to
`CMAKE_INSTALL_PREFIX` so that the `configure_packet_config_file` will
work.

Fixes #2155 and #2269.


(cherry picked from commit f44f05532d)

2021-07-07 17:44:00 +00:00

24 KiB

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