Import Geant4 11.1.0.beta source tree

source/externals/ptl/cmake/Modules/PTLInstallDirs.cmake

@@ -0,0 +1,28 @@
+# -------------------------------------------------------------------------------------- #
+#
+# installation directories
+#
+# -------------------------------------------------------------------------------------- #
+include(GNUInstallDirs)
+
+# cmake installation folder (not exposed to user)
+set(CMAKE_INSTALL_CMAKEDIR ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
+if(NOT IS_ABSOLUTE "${CMAKE_INSTALL_CMAKEDIR}")
+    set(CMAKE_INSTALL_FULL_CMAKEDIR ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_CMAKEDIR})
+else()
+    set(CMAKE_INSTALL_FULL_CMAKEDIR ${CMAKE_INSTALL_CMAKEDIR})
+endif()
+
+# Create PTL_ versions that are used internally and may be overriden by master projects
+# When we are the master project, these are *always* set to the value(s) of
+# CMAKE_INSTALL_<TYPE> Otherwise, the value of CMAKE_INSTALL_<TYPE> is used as the
+# default.
+foreach(_TYPE DATAROOT CMAKE INCLUDE LIB BIN MAN DOC)
+    if(PTL_MASTER_PROJECT)
+        set(PTL_INSTALL_${_TYPE}DIR "${CMAKE_INSTALL_${_TYPE}DIR}")
+    else()
+        if(NOT DEFINED PTL_INSTALL_${_TYPE}DIR)
+            set(PTL_INSTALL_${_TYPE}DIR "${CMAKE_INSTALL_${_TYPE}DIR}")
+        endif()
+    endif()
+endforeach()