Replace boost git submodule with source tarball to build

.gitmodules

@@ -4,9 +4,6 @@
 [submodule "snappy"]
 	path = app/src/main/jni/snappy
 	url = https://github.com/google/snappy.git
-[submodule "boost"]
-	path = app/src/main/jni/boost
-	url = https://github.com/boostorg/boost.git
 [submodule "librime"]
 	path = app/src/main/jni/librime
 	url = https://github.com/rime/librime.git

app/src/main/jni/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.10.0)
+cmake_minimum_required (VERSION 3.18.0)
 
 project(trime-lib VERSION 3.0.0)
 
@@ -16,6 +16,18 @@ include(Iconv)
 # workaround for boost install
 install(TARGETS iconv EXPORT boost_locale-targets)
 
+set(BOOST_VER 1.83.0)
+if(NOT EXISTS ${CMAKE_SOURCE_DIR}/boost)
+    file(
+        DOWNLOAD "https://github.com/boostorg/boost/releases/download/boost-${BOOST_VER}/boost-${BOOST_VER}.tar.xz" boost-${BOOST_VER}.tar.xz
+        EXPECTED_HASH SHA256=c5a0688e1f0c05f354bbd0b32244d36085d9ffc9f932e8a18983a9908096f614
+        SHOW_PROGRESS
+    )
+    file(ARCHIVE_EXTRACT INPUT boost-${BOOST_VER}.tar.xz
+        DESTINATION ${CMAKE_SOURCE_DIR}
+    )
+    file(RENAME "boost-${BOOST_VER}" boost)
+endif()
 add_subdirectory(boost)
 
 option(WITH_GFLAGS "Use gflags" OFF)
@@ -51,12 +63,7 @@ include_directories(
     PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/librime/deps/glog"
     PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/librime/deps/glog/src"
 )
-# workaround for librime/tools/rime_api_console.cc
-# TODO: fix it in upstream
-string(REPLACE "-Werror=format-security" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
-string(REPLACE "-Wformat" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
-add_definitions("-Wno-format")
-# workaround end
+
 add_subdirectory(librime)
 
 add_subdirectory(librime_jni)