cmake: fix rpath

1. https://discourse.cmake.org/t/setting-rpath-and-not-runpath-for-executable/10011
2. https://en.wikipedia.org/wiki/Rpath
3. https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling
4. https://cmake.org/cmake/help/latest/prop_tgt/BUILD_RPATH.html
5. https://cmake.org/cmake/help/latest/prop_tgt/INSTALL_RPATH.html

Author: ligurio

luzer/CMakeLists.txt

@@ -49,7 +49,11 @@ if(ENABLE_TESTING)
   add_subdirectory(tests)
 endif()
 
-include(GNUInstallDirs)
+# include(GNUInstallDirs)
+
+# SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
+# Disable the RPATH stripping during installation.
+SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 
 install(
   TARGETS luzer_impl