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First successful Emscripten/WASM build for #158

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Build produces mcrogueface.wasm (8.9MB) + mcrogueface.js (126KB):
- All 68 C++ source files compile with emcc
- Links Python 3.14 (wasm32-emscripten target)
- Links libtcod-headless (built for Emscripten)
- Uses Emscripten ports: zlib, bzip2, sqlite3
- Includes HACL crypto, expat, mpdec, ffi dependencies

CMakeLists.txt updates:
- Add HACL .o files (not included in libpython3.14.a)
- Add expat, mpdec, ffi static libraries from Python build
- Add libtcod WASM build with lodepng and utf8proc
- Add Emscripten port link options

libtcod-headless submodule updated with Emscripten build.

Next: Bundle Python stdlib into WASM filesystem.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
John McCardle 2026-01-31 00:34:11 -05:00
commit 07fd12373d
3 changed files with 79 additions and 6 deletions
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25
CMakeLists.txt
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@ -93,14 +93,24 @@ endif()
# Create a list of libraries to link against
if(EMSCRIPTEN)
# Emscripten build: link against WASM-compiled Python
# Emscripten build: link against WASM-compiled Python and libtcod
set(PYTHON_WASM_BUILD "${CMAKE_SOURCE_DIR}/deps/cpython/cross-build/wasm32-emscripten/build/python")
set(PYTHON_WASM_PREFIX "${CMAKE_SOURCE_DIR}/deps/cpython/cross-build/wasm32-emscripten/prefix")
set(LIBTCOD_WASM_BUILD "${CMAKE_SOURCE_DIR}/modules/libtcod-headless/build-emscripten")
# Collect HACL crypto object files (not included in libpython3.14.a)
file(GLOB PYTHON_HACL_OBJECTS "${PYTHON_WASM_BUILD}/Modules/_hacl/*.o")
set(LINK_LIBS
${PYTHON_WASM_BUILD}/libpython3.14.a
tcod)
${PYTHON_HACL_OBJECTS}
${PYTHON_WASM_BUILD}/Modules/expat/libexpat.a
${PYTHON_WASM_PREFIX}/lib/libmpdec.a
${PYTHON_WASM_PREFIX}/lib/libffi.a
${LIBTCOD_WASM_BUILD}/libtcod.a
${LIBTCOD_WASM_BUILD}/_deps/lodepng-c-build/liblodepng-c.a
${LIBTCOD_WASM_BUILD}/_deps/utf8proc-build/libutf8proc.a)
include_directories(${CMAKE_SOURCE_DIR}/deps/platform/linux) # Use Linux platform stubs for now
link_directories(${CMAKE_SOURCE_DIR}/__lib)
message(STATUS "Linking Emscripten Python: ${PYTHON_WASM_BUILD}/libpython3.14.a")
message(STATUS "Linking Emscripten libtcod: ${LIBTCOD_WASM_BUILD}/libtcod.a")
elseif(MCRF_HEADLESS)
# Headless build: no SFML, no OpenGL
if(WIN32 OR MCRF_CROSS_WINDOWS)
@ -192,6 +202,15 @@ if(MCRF_HEADLESS)
target_compile_definitions(mcrogueface PRIVATE MCRF_HEADLESS)
endif()
# Emscripten-specific link options (use ports for zlib, bzip2, sqlite3)
if(EMSCRIPTEN)
target_link_options(mcrogueface PRIVATE
-sUSE_ZLIB=1
-sUSE_BZIP2=1
-sUSE_SQLITE3=1
)
endif()
# On Windows, define Py_ENABLE_SHARED for proper Python DLL imports
# Py_PYCONFIG_H prevents Include/pyconfig.h (Linux config) from being included
# (PC/pyconfig.h already defines HAVE_DECLSPEC_DLL and MS_WINDOWS)