add uninstall target

Per the request #694, this adds an "uninstall" target, which is (a) good
form, and (b) requested by Jeff Long, and will make PyBOMBs work more
natively.

Signed-off-by: Robin Getz <[email protected]>

CMakeLists.txt

@@ -657,6 +657,18 @@ if (WITH_USB_BACKEND AND CMAKE_SYSTEM_NAME MATCHES "^Linux")
 	endif()
 endif()
 
+# Add uninstall target
+if(NOT TARGET uninstall)
+	configure_file(
+		"${CMAKE_CURRENT_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in"
+		"${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
+		IMMEDIATE @ONLY
+	)
+
+	add_custom_target(uninstall
+		COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
+endif()
+
 string(REPLACE ";" "," LIBIIO_SCAN_BACKENDS "${LIBIIO_SCAN_BACKENDS}")
 
 configure_file(iio-config.h.cmakein ${CMAKE_CURRENT_BINARY_DIR}/iio-config.h @ONLY)

cmake/cmake_uninstall.cmake.in

@@ -0,0 +1,83 @@
+# based on https://gitlab.kitware.com/cmake/community/-/wikis/FAQ#can-i-do-make-uninstall-with-cmake
+# per : https://gitlab.kitware.com/cmake/community/-/wikis/FAQ#what-is-its-license
+#       The snippets on this wiki are provided under the same license. (BSD 3-clause)
+#
+# CMake - Cross Platform Makefile Generator
+# Copyright 2000-2023 Kitware, Inc. and Contributors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+#
+# * Neither the name of Kitware, Inc. nor the names of Contributors
+#   may be used to endorse or promote products derived from this
+#   software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#D ATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Add uninstall target
+
+cmake_policy(SET CMP0007 NEW)
+
+if(NOT EXISTS "@CMAKE_BINARY_DIR@/install_manifest.txt")
+	message(FATAL_ERROR "Cannot find install manifest: @CMAKE_BINARY_DIR@/install_manifest.txt")
+endif()
+
+file(READ "@CMAKE_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}")
+		else()
+			# delete empty directories (if they are empty)
+		        get_filename_component(dir ${file} DIRECTORY)
+		        string(REPLACE "/" ";" dir_list ${dir})
+		        list(LENGTH dir_list dir_len)
+		        foreach(X RANGE ${dir_len})
+				file(GLOB result LIST_DIRECTORIES true "${dir}/*")
+				list(LENGTH result result_len)
+				if (NOT result_len EQUAL 0)
+					# if directory not empty, stop
+					break()
+				endif()
+				message(STATUS "Removing empty directory: ${dir}")
+				exec_program(
+					"@CMAKE_COMMAND@" ARGS "-E remove_directory ${dir}"
+					OUTPUT_VARIABLE stdout
+					RETURN_VALUE result
+				)
+				if(NOT "${result}" STREQUAL 0)
+					message(FATAL_ERROR "Failed to remove directory: '${file}'.")
+				endif()
+				get_filename_component(dir ${dir} DIRECTORY)
+			endforeach()
+		endif()
+	else(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+		message(STATUS "File $ENV{DESTDIR}${file} does not exist.")
+	endif()
+endforeach()