added basic uninstall support

CMakeLists.txt

@@ -87,6 +87,18 @@ set(EXECUTABLE_OUTPUT_PATH ${gnomepie_SOURCE_DIR})
 
 add_subdirectory(src)
 
+################################################################
+# Add uninstall option
+################################################################
+
+configure_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/CMake_Uninstall.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/CMake_Uninstall.cmake"
+    IMMEDIATE @ONLY)
+
+add_custom_target(uninstall
+    COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/CMake_Uninstall.cmake)
+
 ################################################################
 # Summary
 ################################################################

CMake_Uninstall.cmake.in

@@ -0,0 +1,26 @@
+################################################################
+# Project Gnome-Pie --- uninstall script
+################################################################
+
+if (NOT EXISTS "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt")
+    message(FATAL_ERROR "Cannot find install manifest: \"@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt\"")
+endif(NOT EXISTS "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt")
+
+file(READ "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt" files)
+string(REGEX REPLACE "\n" ";" files "${files}")
+
+foreach (file ${files})
+    message(STATUS "Uninstalling \"$ENV{DESTDIR}${file}\"")
+    if (EXISTS "$ENV{DESTDIR}${file}")
+        execute_process(
+            COMMAND @CMAKE_COMMAND@ -E remove "$ENV{DESTDIR}${file}"
+            OUTPUT_VARIABLE rm_out
+            RESULT_VARIABLE rm_retval
+        )
+        if(NOT ${rm_retval} EQUAL 0)
+            message(FATAL_ERROR "Problem when removing \"$ENV{DESTDIR}${file}\"")
+        endif (NOT ${rm_retval} EQUAL 0)
+    else (EXISTS "$ENV{DESTDIR}${file}")
+        message(STATUS "File \"$ENV{DESTDIR}${file}\" does not exist.")
+    endif (EXISTS "$ENV{DESTDIR}${file}")
+endforeach(file)