[libsigcplusplus/cmake-integration] cmake: add uninstall target

[Marcin Kolny <mkolny src gnome org>]

commit 0e5614f80e077470f77452af5dee380e2c806e76
Author: Marcin Kolny <marcin kolny gmail com>
Date:   Sat Mar 12 15:31:20 2016 +0100

    cmake: add uninstall target

 CMakeLists.txt           |   11 +++++++++++
 cmake_uninstall.cmake.in |   21 +++++++++++++++++++++
 2 files changed, 32 insertions(+), 0 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index af4e099..d322ff5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,6 +47,14 @@ set (top_srcdir .)
 configure_file (sigc++.pc.in sigc++-${SIGCXX_API_VERSION}.pc @ONLY)
 configure_file (sigc++-uninstalled.pc.in sigc++-${SIGCXX_API_VERSION}-uninstalled.pc @ONLY)
 
+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)
+
 
 set(version_config "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
 set(project_config "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake")
@@ -68,6 +76,9 @@ install (FILES
                DESTINATION
                        "${config_install_dir}")
 
+
+
+
 enable_testing()
 
 add_subdirectory (sigc++)
diff --git a/cmake_uninstall.cmake.in b/cmake_uninstall.cmake.in
new file mode 100644
index 0000000..2037e36
--- /dev/null
+++ b/cmake_uninstall.cmake.in
@@ -0,0 +1,21 @@
+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(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)