ENH: Use settings for CPackComponents test to make it fail if the recent fix of cmCPackGenerator.cxx revision 1.16 ever encounters another regression.

Tests/CPackComponents/CMakeLists.txt

@@ -14,8 +14,19 @@ add_library(mylib mylib.cpp)
 add_executable(mylibapp mylibapp.cpp)
 target_link_libraries(mylibapp mylib)
 
+# On Linux, enable using an absolute install path to verify that
+# CMAKE_INSTALL_PREFIX and CPACK_SET_DESTDIR interact properly.
+if(UNIX AND NOT APPLE)
+  set(mylib_install_to_absolute_path ON)
+endif()
+
+if(mylib_install_to_absolute_path)
+  set(CMAKE_INSTALL_PREFIX "/opt/mylib")
+  set(CPACK_SET_DESTDIR ON)
+endif()
+
 # Create installation targets. Note that we put each kind of file
-# into a different component via COMPONENT. These components will 
+# into a different component via COMPONENT. These components will
 # be used to create the installation components.
 install(TARGETS mylib 
   ARCHIVE
@@ -29,9 +40,16 @@ install(FILES mylib.h
   DESTINATION include
   COMPONENT headers)
 
+if(mylib_install_to_absolute_path)
+ install(FILES mylib.cpp
+    DESTINATION /opt/mylib-source
+    COMPONENT source)
+endif()
+
 # CPack boilerplate for this project
 set(CPACK_PACKAGE_NAME "MyLib")
 set(CPACK_PACKAGE_VENDOR "CMake.org")
+set(CPACK_PACKAGE_CONTACT "somebody@cmake.org")
 set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "MyLib - CPack Component Installation Example")
 set(CPACK_PACKAGE_VERSION "1.0.0")
 set(CPACK_PACKAGE_VERSION_MAJOR "1")
@@ -70,3 +88,12 @@ cpack_add_component(headers
   GROUP Development
   DEPENDS libraries
   INSTALL_TYPES Developer Full)
+
+if(mylib_install_to_absolute_path)
+  cpack_add_component(source
+    DISPLAY_NAME "C++ Source Files"
+    DESCRIPTION "C/C++ source files to build MyLib"
+    GROUP Development
+    DEPENDS libraries
+    INSTALL_TYPES Developer Full)
+endif()