Use CPACK_xxx and CMAKE_xxx in a consistent way.

CMAKE_xxx vars are now used in the CMake-generated cmake_install.cmake
script while CPACK_xxx equivalent vars are used from within CPack.
CPack is responsible for getting/forwarding definitions of
CPACK_xxxx var corresponding to CMAKE_xxxx when invoking
CMake-generated install scripts.
As a consequence:
CMAKE_ABSOLUTE_DESTINATION_FILES
CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION
CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION
may be used from outside CPack as well.
e.g.
cmake -DCMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION=1 -P cmake_install.cmake
works as expected.

1 files changed, 30 insertions, 0 deletions

diff --git a/Source/cmDocumentVariables.cxx b/Source/cmDocumentVariables.cxx
index 897e516..fb40024 100644
--- a/Source/cmDocumentVariables.cxx
+++ b/Source/cmDocumentVariables.cxx
@@ -833,6 +833,36 @@ void cmDocumentVariables::DefineVariables(cmake* cm)
      "Default is ON.",false,
      "Variables That Change Behavior");
 
+  cm->DefineProperty
+    ("CMAKE_ABSOLUTE_DESTINATION_FILES", cmProperty::VARIABLE,
+      "List of files which have been installed using "
+      " an ABSOLUTE DESTINATION path.",
+      "This variable is defined by CMake-generated cmake_install.cmake "
+      "scripts."
+      " It can be used (read-only) by program or script that source those"
+      " install scripts. This is used by some CPack generators (e.g. RPM).",
+      false,
+      "Variables That Change Behavior");
+
+  cm->DefineProperty
+    ("CMAKE_WARN_ON_ABSOLUTE_INSTALL_DESTINATION", cmProperty::VARIABLE,
+      "Ask cmake_install.cmake script to warn each time a file with "
+      "absolute INSTALL DESTINATION is encountered.",
+      "This variable is used by CMake-generated cmake_install.cmake"
+      " scripts. If ones set this variable to ON while running the"
+      " script, it may get warning messages from the script.", false,
+      "Variables That Change Behavior");
+
+  cm->DefineProperty
+    ("CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION", cmProperty::VARIABLE,
+      "Ask cmake_install.cmake script to error out as soon as "
+      "a file with absolute INSTALL DESTINATION is encountered.",
+      "The fatal error is emitted before the installation of "
+      "the offending file takes place."
+      " This variable is used by CMake-generated cmake_install.cmake"
+      " scripts. If ones set this variable to ON while running the"
+      " script, it may get fatal error messages from the script.",false,
+      "Variables That Change Behavior");
 
   // Variables defined by CMake that describe the system