Add uninstall target

Author: neural75

CMakeLists.txt

@@ -11,3 +11,13 @@ include_directories("${PROJECT_SOURCE_DIR}")
 add_executable(gqrx-scanner ${PROJECT_SOURCE_DIR}/gqrx-scan.c ${PROJECT_SOURCE_DIR}/gqrx-prot.c)
 target_link_libraries(gqrx-scanner m)
 install (TARGETS gqrx-scanner DESTINATION bin)
+# uninstall target
+if(NOT TARGET uninstall)
+    configure_file(
+        "${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)
+endif()

README.md

@@ -118,6 +118,12 @@ make
 sudo make install
 ```
 
+## Uninstall
+```
+sudo make uninstall
+```
+
+
 ## TODOs
 * set modulation in bookmark search 
 * automatic audio recording on signal detection

cmake_uninstall.cmake.in

@@ -0,0 +1,22 @@
+if(NOT EXISTS "install_manifest.txt")
+	  message(FATAL_ERROR "Cannot find install manifest: install_manifest.txt")
+endif(NOT EXISTS "install_manifest.txt")
+
+file(READ "install_manifest.txt" files)
+string(REGEX REPLACE "\n" ";" files "${files}")
+foreach(file ${files})
+  message(STATUS "Uninstalling $ENV{DESTDIR}${file}")
+  if(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+    exec_program(
+      "@CMAKE_COMMAND@" ARGS "-E remove \"$ENV{DESTDIR}${file}\""
+      OUTPUT_VARIABLE rm_out
+      RETURN_VALUE rm_retval
+      )
+    if(NOT "${rm_retval}" STREQUAL 0)
+      message(FATAL_ERROR "Problem when removing $ENV{DESTDIR}${file}")
+    endif(NOT "${rm_retval}" STREQUAL 0)
+  else(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+    message(STATUS "File $ENV{DESTDIR}${file} does not exist.")
+  endif(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+endforeach(file)
+