Initial commit

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CMakeLists.txt

@@ -0,0 +1,86 @@
+cmake_minimum_required(VERSION 3.24)
+project(smack_a_brother LANGUAGES C CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+# The simulation must run identically on every platform (desktop and web play together), so floating point is kept
+# strict: no fusing multiplies and adds (GCC and arm64 Clang do by default), no fast-math reordering. The maths
+# library's transcendentals are replaced by src/dmath.h; tools/determinism_check.sh checks it all holds.
+if(MSVC)
+    add_compile_options(/fp:precise /fp:contract-)
+else()
+    add_compile_options(-ffp-contract=off -fno-fast-math)
+endif()
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE RelWithDebInfo)
+endif()
+
+# SDL: static, with only the video (OpenGL), audio and gamepad pieces the game uses.
+set(SDL_SHARED OFF CACHE BOOL "" FORCE)
+set(SDL_STATIC ON CACHE BOOL "" FORCE)
+set(SDL_OPENGL ON CACHE BOOL "" FORCE)
+set(SDL_JOYSTICK ON CACHE BOOL "" FORCE)
+set(SDL_HIDAPI ON CACHE BOOL "" FORCE)
+set(SDL_VIRTUAL_JOYSTICK ON CACHE BOOL "" FORCE)
+set(SDL_TEST_LIBRARY OFF CACHE BOOL "" FORCE)
+set(SDL_EXAMPLES OFF CACHE BOOL "" FORCE)
+foreach(OPTION RENDER GPU VULKAN CAMERA HAPTIC HIDAPI_LIBUSB POWER SENSOR DIALOG TRAY OPENGLES OFFSCREEN
+        DUMMYVIDEO DISKAUDIO DUMMYAUDIO OSS JACK SNDIO KMSDRM IBUS LIBURING)
+    set(SDL_${OPTION} OFF CACHE BOOL "" FORCE)
+endforeach()
+add_subdirectory(external/sdl EXCLUDE_FROM_ALL)
+
+# simdjson: its single-file build, static, without exceptions.
+add_library(simdjson STATIC external/simdjson/singleheader/simdjson.cpp)
+target_include_directories(simdjson SYSTEM PUBLIC external/simdjson/singleheader)
+target_compile_definitions(simdjson PUBLIC SIMDJSON_EXCEPTIONS=0)
+
+# Networking: WebRTC data channels between players and a WebSocket to the server. On desktop it's
+# libdatachannel (static, data channels only, no media); in the browser, datachannel-wasm gives the same API over the
+# browser's own WebRTC.
+if(EMSCRIPTEN)
+    add_subdirectory(external/datachannel-wasm EXCLUDE_FROM_ALL)
+    set(NETWORK_LIBRARY datachannel-wasm)
+else()
+    set(NO_MEDIA ON CACHE BOOL "" FORCE)
+    set(NO_EXAMPLES ON CACHE BOOL "" FORCE)
+    set(NO_TESTS ON CACHE BOOL "" FORCE)
+    add_subdirectory(external/libdatachannel EXCLUDE_FROM_ALL)
+    set(NETWORK_LIBRARY LibDataChannel::LibDataChannelStatic)
+    # The server, which can also be built on its own (see server/CMakeLists.txt).
+    add_subdirectory(server)
+endif()
+
+file(GLOB SOURCES CONFIGURE_DEPENDS src/*.cpp)
+add_executable(smack_a_brother ${SOURCES})
+target_include_directories(smack_a_brother SYSTEM PRIVATE external/stb)
+target_link_libraries(smack_a_brother PRIVATE SDL3::SDL3-static simdjson ${NETWORK_LIBRARY})
+set_target_properties(smack_a_brother PROPERTIES OUTPUT_NAME smack-a-brother)
+
+file(CREATE_LINK ${CMAKE_SOURCE_DIR}/resources ${CMAKE_BINARY_DIR}/resources SYMBOLIC)
+
+# Emscripten: RPG_NODE builds a headless copy for node (balance runs and the determinism check), with the resources
+# embedded.
+if(EMSCRIPTEN)
+    option(RPG_NODE "Build for node, headless" OFF)
+    target_link_options(smack_a_brother PRIVATE -sALLOW_MEMORY_GROWTH=1 -sSTACK_SIZE=1048576)
+    if(NOT RPG_NODE)
+        # The browser build: WebGL2, the resources preloaded, the prefs folder kept in browser storage, and a page
+        # whose canvas fills the window.
+        set_target_properties(smack_a_brother PROPERTIES SUFFIX ".html")
+        target_link_options(smack_a_brother PRIVATE -sMIN_WEBGL_VERSION=2 -sMAX_WEBGL_VERSION=2 -lidbfs.js
+                            "--preload-file=${CMAKE_SOURCE_DIR}/resources/gfx@/resources/gfx"
+                            "--preload-file=${CMAKE_SOURCE_DIR}/resources/font@/resources/font"
+                            "--preload-file=${CMAKE_SOURCE_DIR}/resources/sfx@/resources/sfx"
+                            "--shell-file=${CMAKE_SOURCE_DIR}/tools/web_shell.html"
+                            "--pre-js=${CMAKE_SOURCE_DIR}/tools/web_pre.js")
+    endif()
+    if(RPG_NODE)
+        target_link_options(smack_a_brother PRIVATE -sENVIRONMENT=node -sEXIT_RUNTIME=1
+                            "--pre-js=${CMAKE_SOURCE_DIR}/tools/node_pre.js"
+                            "--embed-file=${CMAKE_SOURCE_DIR}/resources/gfx@/resources/gfx"
+                            "--embed-file=${CMAKE_SOURCE_DIR}/resources/font@/resources/font")
+    endif()
+endif()