Add boost as a submodule

This can be used in builds by specifying the USE_SUBMODULE_BOOST option

.gitmodules

@@ -41,3 +41,6 @@
 [submodule "tools/crash-handler"]
 	path = tools/crash-handler
 	url = https://github.com/Chatterino/crash-handler
+[submodule "lib/boost"]
+	path = lib/boost
+	url = https://github.com/boostorg/boost

CMakeLists.txt

@@ -14,6 +14,7 @@ option(BUILD_BENCHMARKS "Build the benchmarks for Chatterino" OFF)
 option(USE_SYSTEM_PAJLADA_SETTINGS "Use system pajlada settings library" OFF)
 option(USE_SYSTEM_LIBCOMMUNI "Use system communi library" OFF)
 option(USE_SYSTEM_QTKEYCHAIN "Use system QtKeychain library" OFF)
+option(USE_SUBMODULE_BOOST "Use boost from submodules" OFF)
 option(BUILD_WITH_QTKEYCHAIN "Build Chatterino with support for your system key chain" ON)
 option(USE_SYSTEM_MINIAUDIO "Build Chatterino with your system miniaudio" OFF)
 option(BUILD_WITH_CRASHPAD "Build chatterino with crashpad" OFF)
@@ -122,8 +123,11 @@ endif ()
 
 find_package(Sanitizers QUIET)
 
-# Find boost on the system
-find_package(Boost REQUIRED OPTIONAL_COMPONENTS headers)
+if (USE_SUBMODULE_BOOST)
+    add_subdirectory(lib/boost EXCLUDE_FROM_ALL)
+else ()
+    find_package(Boost REQUIRED OPTIONAL_COMPONENTS headers)
+endif ()
 
 # Find OpenSSL on the system
 find_package(OpenSSL REQUIRED)

lib/boost

@@ -0,0 +1 @@
+Subproject commit 8fa3090c97542b7e0a837fc8b580268b9d76e585

src/CMakeLists.txt

@@ -1002,10 +1002,20 @@ if (WIN32)
         WinToast)
 endif ()
 
-target_link_libraries(${LIBRARY_PROJECT}
-        PUBLIC
-        ${Boost_LIBRARIES}
-        )
+if (USE_SUBMODULE_BOOST)
+    target_link_libraries(${LIBRARY_PROJECT}
+            PUBLIC
+            Boost::asio
+            Boost::circular_buffer
+            Boost::signals2
+            Boost::interprocess
+            )
+else ()
+    target_link_libraries(${LIBRARY_PROJECT}
+            PUBLIC
+            ${Boost_LIBRARIES}
+            )
+endif ()
 
 target_link_libraries(${LIBRARY_PROJECT}
         PUBLIC