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Add WASM build target for Web version of glslang

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This adds build rules to support generating a WASM binary to be used
on the web. The API exposed to web applications is definated in the
new glslang.js.cpp file.
This commit is contained in:
Ryan Harrison 2019-08-08 13:50:13 -04:00
parent 3cea2e5882
commit c96e42dca8
4 changed files with 336 additions and 0 deletions
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24
CMakeLists.txt
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@ -32,6 +32,9 @@ option(ENABLE_HLSL "Enables HLSL input support" ON)
option(ENABLE_OPT "Enables spirv-opt capability if present" ON)
option(ENABLE_GLSLANG_WEB "Reduces glslang to minumum needed for web use" OFF)
option(ENABLE_EMSCRIPTEN_SINGLE_FILE "If using emscripten, enables SINGLE_FILE build" OFF)
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT AND WIN32)
set(CMAKE_INSTALL_PREFIX "install" CACHE STRING "..." FORCE)
endif()
@ -98,6 +101,27 @@ elseif(${CMAKE_CXX_COMPILER_ID} MATCHES "MSVC")
add_compile_options(/GR-) # Disable RTTI
endif()
if(ENABLE_GLSLANG_WEB)
if(EMSCRIPTEN)
add_compile_options(-Os -fno-exceptions)
add_compile_options("SHELL: -s WASM=1")
add_compile_options("SHELL: -s WASM_OBJECT_FILES=0")
add_link_options(-Os)
add_link_options("SHELL: -s FILESYSTEM=0")
add_link_options("SHELL: --llvm-lto 1")
add_link_options("SHELL: --closure 1")
add_link_options("SHELL: -s ENVIRONMENT=web,worker")
add_link_options("SHELL: -s ALLOW_MEMORY_GROWTH=1")
add_link_options("SHELL: -s MODULARIZE=1")
if(ENABLE_EMSCRIPTEN_SINGLE_FILE)
add_link_options("SHELL: -s SINGLE_FILE=1")
endif(ENABLE_EMSCRIPTEN_SINGLE_FILE)
else(EMSCRIPTEN)
add_compile_options(-Os -g -flto -fno-exceptions)
endif(EMSCRIPTEN)
endif(ENABLE_GLSLANG_WEB)
# Request C++11
if(${CMAKE_VERSION} VERSION_LESS 3.1)
# CMake versions before 3.1 do not understand CMAKE_CXX_STANDARD