opencc_patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1acb75a..b9b49da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -152,12 +152,23 @@ add_definitions(
   -DPACKAGE_NAME="${PACKAGE_NAME}"
 )
 
+# Reproducible build
+add_definitions(-ffile-prefix-map=${CMAKE_CURRENT_SOURCE_DIR}=.)
+
+if (EMSCRIPTEN)
+  add_definitions(-I"${CMAKE_CURRENT_SOURCE_DIR}/../../../build/sysroot/usr/include")
+else()
+  add_definitions(-I"${CMAKE_CURRENT_SOURCE_DIR}/../../include")
+endif()
+
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
   add_definitions(
     -std=c++14
     -Wall
   )
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread")
+  if (NOT EMSCRIPTEN)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread")
+  endif ()
   if (CMAKE_BUILD_TYPE MATCHES Debug)
     add_definitions(-O0 -g3)
   endif ()
@@ -221,9 +232,6 @@ endif()
 ######## Subdirectories
 
 add_subdirectory(src)
-add_subdirectory(doc)
-add_subdirectory(data)
-add_subdirectory(test)
 
 ######## Testing
 
diff --git a/deps/rapidjson-1.1.0/rapidjson/document.h b/deps/rapidjson-1.1.0/rapidjson/document.h
index e3e20df..ad362a6 100644
--- a/deps/rapidjson-1.1.0/rapidjson/document.h
+++ b/deps/rapidjson-1.1.0/rapidjson/document.h
@@ -322,7 +322,7 @@ struct GenericStringRef {
     operator const Ch *() const { return s; }
 
     const Ch* const s; //!< plain CharType pointer
-    const SizeType length; //!< length of the string (excluding the trailing NULL terminator)
+    SizeType length; //!< length of the string (excluding the trailing NULL terminator)
 
 private:
     //! Disallow construction from non-const array
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 75eda02..c7bb8c5 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -204,5 +204,3 @@ if (ENABLE_BENCHMARK)
 endif()
 
 # Subdir
-
-add_subdirectory(tools)