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diff --git a/Help/policy/CMP0095.rst b/Help/policy/CMP0095.rst new file mode 100644 index 0000000..4c56a05 --- /dev/null +++ b/Help/policy/CMP0095.rst @@ -0,0 +1,30 @@ +CMP0095 +------- + +``RPATH`` entries are properly escaped in the intermediary CMake install script. + +In CMake 3.15 and earlier, ``RPATH`` entries set via +:variable:`CMAKE_INSTALL_RPATH` or via :prop_tgt:`INSTALL_RPATH` have not been +escaped before being inserted into the ``cmake_install.cmake`` script. Dynamic +linkers on ELF-based systems (e.g. Linux and FreeBSD) allow certain keywords in +``RPATH`` entries, such as ``${ORIGIN}`` (More details are available in the +``ld.so`` man pages on those systems). The syntax of these keywords can match +CMake's variable syntax. In order to not be substituted (usually to an empty +string) already by the intermediary ``cmake_install.cmake`` script, the user had +to double-escape such ``RPATH`` keywords, e.g. +``set(CMAKE_INSTALL_RPATH "\\\${ORIGIN}/../lib")``. Since the intermediary +``cmake_install.cmake`` script is an implementation detail of CMake, CMake 3.16 +and later will make sure ``RPATH`` entries are inserted literally by escaping +any coincidental CMake syntax. + +The ``OLD`` behavior of this policy is to not escape ``RPATH`` entries in the +intermediary ``cmake_install.cmake`` script. The ``NEW`` behavior is to properly +escape coincidental CMake syntax in ``RPATH`` entries when generating the +intermediary ``cmake_install.cmake`` script. + +This policy was introduced in CMake version 3.16. CMake version |release| warns +when the policy is not set and detected usage of CMake-like syntax and uses +``OLD`` behavior. Use the :command:`cmake_policy` command to set it to ``OLD`` +or ``NEW`` explicitly. + +.. include:: DEPRECATED.txt |