Add target_include_directories command to CMakeLists.txt (BYVoid#769)

Ref: https://cmake.org/cmake/help/latest/command/target_include_directories.html#command:target_include_directories

Author: WhiredPlanck

OpenCCConfig.cmake.in

@@ -2,6 +2,6 @@
 
 include(${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake)
 
-set_and_check(OPENCC_INCLUDE_DIR @PACKAGE_DIR_INCLUDE@opencc)
+set_and_check(OPENCC_INCLUDE_DIR @PACKAGE_DIR_INCLUDE@/opencc)
 
 check_required_components(OpenCC)

src/CMakeLists.txt

@@ -116,6 +116,10 @@ add_library(OpenCC::OpenCC ALIAS libopencc)
 set_target_properties(libopencc PROPERTIES POSITION_INDEPENDENT_CODE ON)
 source_group(libopencc FILES ${LIBOPENCC_SOURCES} ${LIBOPENCC_HEADERS})
 target_link_libraries(libopencc marisa)
+target_include_directories(libopencc PUBLIC
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+    $<INSTALL_INTERFACE:${DIR_INCLUDE}/opencc>
+)
 
 GENERATE_EXPORT_HEADER(
   libopencc