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web: Fix emscripten build

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The web/emscripten build has been broken for an unknown amount of time
and for multiple reasons:
  - Calling `cat` on Windows
  - The latest version of wasm-ld does not support the `--no-undefined`
    flag
  - `ccall` was not being exported

Fixes #3272.
This commit is contained in:
Nathaniel Cesario 2023-07-20 10:46:47 -06:00 committed by arcady-lunarg
parent 77417d5c9e
commit 45ce545ad3
3 changed files with 18 additions and 5 deletions
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4
CMakeLists.txt
View File

@ -159,8 +159,8 @@ elseif(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang" AND NOT MSVC)
add_compile_options(-fno-exceptions)
endif()
if(NOT CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
# Error if there's symbols that are not found at link time.
if(NOT (CMAKE_SYSTEM_NAME STREQUAL "OpenBSD" OR CMAKE_SYSTEM_NAME STREQUAL "Emscripten"))
# Error if there's symbols that are not found at link time. Some linkers do not support this flag.
if (CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
add_link_options("-Wl,-undefined,error")
elseif(NOT APPLE)

17
glslang/OSDependent/Web/CMakeLists.txt
View File

@ -53,6 +53,9 @@ if(ENABLE_GLSLANG_JS)
target_link_libraries(glslang.js "-s ALLOW_MEMORY_GROWTH=1")
target_link_libraries(glslang.js "-s FILESYSTEM=0")
# We use ccall in glslang.pre.js, so make sure it's exposed
target_link_libraries(glslang.js "-s EXPORTED_RUNTIME_METHODS=ccall")
if(ENABLE_EMSCRIPTEN_SINGLE_FILE)
target_link_libraries(glslang.js "-s SINGLE_FILE=1")
endif()
@ -64,8 +67,18 @@ if(ENABLE_GLSLANG_JS)
endif()
if(NOT ENABLE_EMSCRIPTEN_ENVIRONMENT_NODE)
add_custom_command(TARGET glslang.js POST_BUILD
COMMAND cat ${CMAKE_CURRENT_SOURCE_DIR}/glslang.after.js >> ${CMAKE_CURRENT_BINARY_DIR}/glslang.js)
if (CMAKE_HOST_SYSTEM MATCHES "Windows.*")
# There are several ways we could append one file to another on Windows, but unfortunately 'cat' is not one of them
# (there is no 'cat' command in cmd). Also, since this will ultimately run in cmd and not pwsh, we need to ensure
# Windows path separators are used.
file(TO_NATIVE_PATH "${CMAKE_CURRENT_BINARY_DIR}/glslang.js" glslang_js_path)
file(TO_NATIVE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/glslang.after.js" glslang_after_js_path)
add_custom_command(TARGET glslang.js POST_BUILD
COMMAND type "${glslang_after_js_path}" >> "${glslang_js_path}")
else()
add_custom_command(TARGET glslang.js POST_BUILD
COMMAND cat ${CMAKE_CURRENT_SOURCE_DIR}/glslang.after.js >> ${CMAKE_CURRENT_BINARY_DIR}/glslang.js)
endif()
endif()
endif()
endif()

2
glslang/OSDependent/Web/glslang.pre.js
View File

@ -25,7 +25,7 @@ Module['compileGLSLZeroCopy'] = function(glsl, shader_stage, gen_debug, spirv_ve
var p_output = Module['_malloc'](4);
var p_output_len = Module['_malloc'](4);
var id = ccall('convert_glsl_to_spirv',
var id = Module['ccall']('convert_glsl_to_spirv',
'number',
['string', 'number', 'boolean', 'number', 'number', 'number'],
[glsl, shader_stage_int, gen_debug, spirv_version_int, p_output, p_output_len]);