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1 files changed, 98 insertions, 0 deletions

diff --git a/2026/submissions/threecoff/clennis/CMakeLists.txt b/2026/submissions/threecoff/clennis/CMakeLists.txt
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+++ b/2026/submissions/threecoff/clennis/CMakeLists.txt
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+cmake_minimum_required(VERSION 3.16)
+project(clonk_tennis C)
+
+set(CMAKE_C_STANDARD 17)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON) # for clangd (see .clangd)
+
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    set(CMAKE_BUILD_TYPE Debug CACHE STRING "" FORCE)
+endif()
+
+include(FetchContent)
+
+# --- raylib: windowing, rendering, input (native + web) ---
+set(BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
+set(BUILD_GAMES    OFF CACHE BOOL "" FORCE)
+FetchContent_Declare(
+    raylib
+    URL https://github.com/raysan5/raylib/archive/refs/tags/5.5.tar.gz
+)
+
+# --- box3d: 3D rigid body physics (Erin Catto). Only the library builds via
+#     FetchContent: its samples/tests (and their forced -pthread) are gated
+#     behind PROJECT_IS_TOP_LEVEL, and it sets its own SIMD flags for wasm. ---
+FetchContent_Declare(
+    box3d
+    URL https://github.com/erincatto/box3d/archive/refs/tags/v0.1.0.tar.gz
+)
+
+FetchContent_MakeAvailable(raylib box3d)
+
+add_executable(tennis src/main.c)
+target_link_libraries(tennis PRIVATE raylib box3d::box3d)
+
+if(NOT EMSCRIPTEN)
+    # main.c pokes GLFW directly (glfwSetInputMode, to undo raylib's
+    # raw-mouse-motion default); use the GLFW bundled inside raylib.
+    target_include_directories(tennis PRIVATE
+        "${raylib_SOURCE_DIR}/src/external/glfw/include")
+endif()
+
+# Where the game finds its models at runtime: baked into the wasm bundle on
+# web, read straight from the source tree natively (dev builds only).
+if(EMSCRIPTEN)
+    target_compile_definitions(tennis PRIVATE ASSETS_DIR="assets")
+else()
+    target_compile_definitions(tennis PRIVATE ASSETS_DIR="${CMAKE_CURRENT_SOURCE_DIR}/assets")
+endif()
+
+if(EMSCRIPTEN)
+    # Work around an LLVM optimizer crash in emcc's clang (6.0.3) that segfaults
+    # while compiling some Box3D files at -O2/-O3 (independent of SIMD). Build the
+    # physics library at -O1 on web; it's more than fast enough for this game.
+    # The trailing -O1 wins over the build-type -O3 for this target only.
+    if(TARGET box3d)
+        target_compile_options(box3d PRIVATE -O1)
+    endif()
+
+    # Produce tennis.html + tennis.js + tennis.wasm
+    set_target_properties(tennis PROPERTIES SUFFIX ".html")
+    target_compile_definitions(tennis PRIVATE PLATFORM_WEB)
+    target_link_options(tennis PRIVATE
+        -sUSE_GLFW=3
+        -sALLOW_MEMORY_GROWTH=1
+        # dr_mp3's whole-file decode (raylib LoadSound on .mp3) keeps ~30KB of
+        # scratch structs on the stack and overflows Emscripten's 64KB default,
+        # crashing at startup with "memory access out of bounds".
+        -sSTACK_SIZE=262144
+        -sGL_ENABLE_GET_PROC_ADDRESS=1
+        # Emscripten 4+ stopped putting the heap views on Module by default,
+        # but raylib's miniaudio audio callback reads Module.HEAPF32 — without
+        # this every audio tick throws "Cannot read properties of undefined
+        # (reading 'buffer')" in the ScriptProcessorNode handler.
+        "-sEXPORTED_RUNTIME_METHODS=HEAP8,HEAPU8,HEAP16,HEAPU16,HEAP32,HEAPU32,HEAPF32,HEAPF64"
+        --shell-file "${CMAKE_CURRENT_SOURCE_DIR}/shell.html"
+        --preload-file "${CMAKE_CURRENT_SOURCE_DIR}/assets@assets"
+    )
+
+    # Also expose the page as index.html so a plain directory server's bare
+    # URL (e.g. http://localhost:8000/) serves the game, not a file listing.
+    add_custom_command(TARGET tennis POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
+                "$<TARGET_FILE:tennis>" "${CMAKE_CURRENT_BINARY_DIR}/index.html"
+        VERBATIM
+    )
+
+    # `cmake --install` publishes just the runtime files (what a web server
+    # needs), leaving all the CMake/emscripten machinery in the build dir.
+    install(FILES
+        "${CMAKE_CURRENT_BINARY_DIR}/index.html"
+        "${CMAKE_CURRENT_BINARY_DIR}/tennis.html"
+        "${CMAKE_CURRENT_BINARY_DIR}/tennis.js"
+        "${CMAKE_CURRENT_BINARY_DIR}/tennis.wasm"
+        "${CMAKE_CURRENT_BINARY_DIR}/tennis.data"
+        DESTINATION .
+        COMPONENT web   # keeps raylib/box3d's own install rules out
+    )
+endif()