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Mujoco_WASM/wasm/CMakeLists.txt
T
Matija Kecman c23b5e8420 Fix WASM build issues, improve test coverage and improve cmake files
* Ensure compiler.usethread=0 is set before compilation in single-threaded WASM builds
* Explicitly enable exceptions for the single-threaded WASM module
* Test the single-threaded module in addition to the multi-threaded module in internal and external CI
* Consolidate wasm/tests/CMakeLists.txt into wasm/CMakeLists.txt, fixing the single-threaded benchmark test build which was missing shared linker flags

PiperOrigin-RevId: 901149728
Change-Id: If4946e29e5116610782d218906cf3f5940c1cdd0
2026-04-17 01:29:40 -07:00

116 lines
3.8 KiB
CMake

# Copyright 2025 DeepMind Technologies Limited
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/wasm/dist")
set(CMAKE_INSTALL_PREFIX ${PROJECT_SOURCE_DIR}/wasm)
include_directories(${PROJECT_SOURCE_DIR}/include)
include_directories(${PROJECT_SOURCE_DIR}/src)
include_directories(${PROJECT_SOURCE_DIR})
link_directories(${CMAKE_BINARY_DIR}/lib)
# Set Emscripten compile flags.
# -fexceptions is required for val::throw_() (used by ThrowMujocoErrorToJS) to
# actually throw a JS exception. Without it, Emscripten compiles throw as a
# no-op. In the MT build, -pthread implicitly enables exception support, but
# the ST build needs it set explicitly here.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexceptions")
# Set Emscripten linker flags shared by all WASM targets.
set(EMCC_LINKER_FLAGS
"--bind"
"-s ASSERTIONS=1"
"-s ALLOW_MEMORY_GROWTH=1"
"-s EXPORT_ES6=1"
"-s MODULARIZE=1"
"-s FORCE_FILESYSTEM=1"
"-s EXPORTED_RUNTIME_METHODS=['ccall','cwrap','FS','MEMFS']"
"-s EXPORT_NAME=loadMujoco"
"-s DISABLE_EXCEPTION_CATCHING=0"
"-fexceptions"
"-gsource-map"
"-g"
)
if(MUJOCO_WASM_THREADS)
list(APPEND EMCC_LINKER_FLAGS
"-pthread"
"-s PTHREAD_POOL_SIZE=navigator.hardwareConcurrency"
)
add_definitions(-DMUJOCO_WASM_THREADS)
endif()
# Common link libraries for all WASM targets. The mujoco library is linked as a
# whole archive to avoid losing plugin registration such as obj_decoder and
# stl_decoder.
set(MUJOCO_WASM_LINK_LIBRARIES
-Wl,--whole-archive mujoco -Wl,--no-whole-archive
ccd lodepng tinyxml2 qhullstatic_r
)
# --- Main WASM bindings target ---
file(GLOB MUJOCO_WASM_FILES
"codegen/generated/*.cc"
"unpack.cc"
)
if(NOT MUJOCO_WASM_FILES)
message(FATAL_ERROR "No source files found in codegen/generated/")
endif()
set(MUJOCO_WASM_LINKER_FLAGS ${EMCC_LINKER_FLAGS} "--emit-tsd mujoco.d.ts")
string(REPLACE ";" " " MUJOCO_WASM_LINKER_FLAGS_STR "${MUJOCO_WASM_LINKER_FLAGS}")
add_executable(mujoco_wasm ${MUJOCO_WASM_FILES})
# Keep the internal target name distinct to avoid colliding with the native
# `mujoco` library target, but emit artifacts named `mujoco.*` by setting the
# output name. Also apply the emscripten linker flags to the wasm target.
set_target_properties(mujoco_wasm PROPERTIES
LINK_FLAGS "${MUJOCO_WASM_LINKER_FLAGS_STR}"
OUTPUT_NAME "mujoco"
)
target_link_libraries(mujoco_wasm PRIVATE ${MUJOCO_WASM_LINK_LIBRARIES})
install(TARGETS mujoco_wasm DESTINATION ${DIVISIBLE_INSTALL_BIN_DIR})
# --- Benchmark target ---
if(MUJOCO_BUILD_TESTS_WASM)
file(GLOB MUJOCO_WASM_BENCHMARK_FILES
"tests/benchmark_test.cc"
"unpack.cc"
)
if(NOT MUJOCO_WASM_BENCHMARK_FILES)
message(FATAL_ERROR "No benchmark source files found")
endif()
set(BENCHMARK_LINKER_FLAGS ${EMCC_LINKER_FLAGS} "--emit-tsd mujoco_wasm_benchmark.d.ts")
string(REPLACE ";" " " BENCHMARK_LINKER_FLAGS_STR "${BENCHMARK_LINKER_FLAGS}")
add_executable(mujoco_wasm_benchmark ${MUJOCO_WASM_BENCHMARK_FILES})
set_target_properties(mujoco_wasm_benchmark PROPERTIES
LINK_FLAGS "${BENCHMARK_LINKER_FLAGS_STR}"
)
target_link_libraries(mujoco_wasm_benchmark PRIVATE ${MUJOCO_WASM_LINK_LIBRARIES})
install(TARGETS mujoco_wasm_benchmark DESTINATION ${DIVISIBLE_INSTALL_BIN_DIR})
endif()