mirror of
https://github.com/ChaiScript/ChaiScript.git
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0fd9cab654
ChaiScript relies heavily on C++ exceptions for error propagation, but the Emscripten build was missing the -fwasm-exceptions flag. Without it, any C++ exception in the WASM module causes an abort instead of being catchable by JavaScript. Added -fwasm-exceptions as both a compile and link option, and added a regression test verifying exception propagation through the eval wrapper functions. Co-authored-by: leftibot <leftibot@users.noreply.github.com> Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
41 lines
1.3 KiB
CMake
41 lines
1.3 KiB
CMake
# Emscripten/WebAssembly build for ChaiScript
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# Based on work by Rob Loach: https://github.com/RobLoach/ChaiScript.js
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#
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# Usage:
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# emcmake cmake -B build-em -S emscripten
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# cmake --build build-em
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cmake_minimum_required(VERSION 3.12)
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project(chaiscript_em)
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set(CMAKE_CXX_STANDARD 20)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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# Emscripten-specific compiler/linker flags
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add_definitions(-DCHAISCRIPT_NO_THREADS -DCHAISCRIPT_NO_DYNLOAD)
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add_executable(chaiscript chaiscript_em.cpp)
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target_include_directories(chaiscript PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../include)
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# Enable WASM exception handling — ChaiScript relies on C++ exceptions for
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# error propagation; without this flag exceptions cause an abort in WASM.
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target_compile_options(chaiscript PRIVATE -fwasm-exceptions)
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# Emscripten link flags: enable embind, allow memory growth, export as ES module-compatible
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target_link_options(chaiscript PRIVATE
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--bind
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-fwasm-exceptions
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-sALLOW_MEMORY_GROWTH=1
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-sEXPORT_ES6=0
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-sMODULARIZE=0
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-sINVOKE_RUN=0
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)
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# Copy the HTML shell to the build output directory
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add_custom_command(TARGET chaiscript POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E copy
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${CMAKE_CURRENT_SOURCE_DIR}/chaiscript.html
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${CMAKE_CURRENT_BINARY_DIR}/chaiscript.html
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COMMENT "Copying HTML frontend to build directory"
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)
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