build: Added make uninstall (#784)

CMakeLists.txt

@@ -37,6 +37,7 @@ detectOS()
 detectArch()
 addVersionDefines()
 configurePackingResources()
+setUninstallTarget()
 
 # Add ImHex sources
 add_subdirectory(lib/libimhex)

cmake/build_helpers.cmake

@@ -413,4 +413,17 @@ macro(setupCompilerWarnings target)
     set(CMAKE_C_FLAGS    "${CMAKE_C_FLAGS}    ${IMHEX_C_FLAGS}")
     set(CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS}  ${IMHEX_C_FLAGS}")
     set(CMAKE_OBJC_FLAGS "${CMAKE_OBJC_FLAGS} ${IMHEX_COMMON_FLAGS}")
+endmacro()
+
+# uninstall target
+macro(setUninstallTarget)
+    if(NOT TARGET uninstall)
+        configure_file(
+        "${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()
 endmacro()

cmake/cmake_uninstall.cmake.in

@@ -0,0 +1,21 @@
+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}")
+    endif()
+  else(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+    message(STATUS "File $ENV{DESTDIR}${file} does not exist.")
+  endif()
+endforeach()