Add CMAKE_INSTAL_PREFIX/lib to the RPATH if not already done to make json-schema-validator happy

Author: fabianbs96

CMakeLists.txt

@@ -116,6 +116,12 @@ include_directories(
 
 if (NOT PHASAR_IN_TREE)
   set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
+
+  if (NOT "${CMAKE_INSTALL_LIBDIR}" STREQUAL "lib")
+    message(STATUS "Detected CMAKE_INSTALL_LIBDIR that deviates from 'lib': ${CMAKE_INSTALL_LIBDIR}. Add ${CMAKE_INSTALL_PREFIX}/lib to the RPATH as json-schema-validator needs it")
+    list(APPEND CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
+  endif()
+
   set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 endif()