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Pass emscripten linker options only when linking.

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This commit is contained in:
Daniel Kirchner 2021-11-04 11:17:28 +01:00
parent df6f930408
commit e7deedb707
3 changed files with 16 additions and 13 deletions
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1
Changelog.md
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@ -32,6 +32,7 @@ Bugfixes:
Build System:
* Pass linker-only emscripten options only when linking.
* Remove obsolete compatibility workaround for emscripten builds.

26
cmake/EthCompilerSettings.cmake
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@ -111,39 +111,41 @@ if (("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") OR ("${CMAKE_CXX_COMPILER_ID}" MA
# http://stackoverflow.com/questions/21617158/how-to-silence-unused-command-line-argument-error-with-clang-without-disabling-i
add_compile_options(-Qunused-arguments)
elseif(EMSCRIPTEN)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --memory-init-file 0")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --memory-init-file 0")
# Leave only exported symbols as public and aggressively remove others
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdata-sections -ffunction-sections -fvisibility=hidden")
# Optimisation level
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
# Re-enable exception catching (optimisations above -O1 disable it)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s DISABLE_EXCEPTION_CATCHING=0")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s DISABLE_EXCEPTION_CATCHING=0")
# Remove any code related to exit (such as atexit)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s EXIT_RUNTIME=0")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s EXIT_RUNTIME=0")
# Remove any code related to filesystem access
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s FILESYSTEM=0")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s FILESYSTEM=0")
# Allow memory growth, but disable some optimisations
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s ALLOW_MEMORY_GROWTH=1")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s ALLOW_MEMORY_GROWTH=1")
# Disable eval()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s DYNAMIC_EXECUTION=0")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s DYNAMIC_EXECUTION=0")
# Disable greedy exception catcher
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s NODEJS_CATCH_EXIT=0")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s NODEJS_CATCH_EXIT=0")
# Abort if linking results in any undefined symbols
# Note: this is on by default in the CMake Emscripten module which we aren't using
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s ERROR_ON_UNDEFINED_SYMBOLS=1")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s ERROR_ON_UNDEFINED_SYMBOLS=1")
# Disallow deprecated emscripten build options.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s STRICT=1")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s STRICT=1")
# Export the Emscripten-generated auxiliary methods which are needed by solc-js.
# Which methods of libsolc itself are exported is specified in libsolc/CMakeLists.txt.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s EXTRA_EXPORTED_RUNTIME_METHODS=['cwrap','addFunction','removeFunction','UTF8ToString','lengthBytesUTF8','stringToUTF8','setValue']")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s EXTRA_EXPORTED_RUNTIME_METHODS=['cwrap','addFunction','removeFunction','UTF8ToString','lengthBytesUTF8','stringToUTF8','setValue']")
# Build for webassembly target.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s WASM=1")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s WASM=1")
# Set webassembly build to synchronous loading.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s WASM_ASYNC_COMPILATION=0")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s WASM_ASYNC_COMPILATION=0")
# Output a single js file with the wasm binary embedded as base64 string.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s SINGLE_FILE=1")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s SINGLE_FILE=1")
# Allow new functions to be added to the wasm module via addFunction.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s ALLOW_TABLE_GROWTH=1")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s ALLOW_TABLE_GROWTH=1")
# Disable warnings about not being pure asm.js due to memory growth.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-almost-asm")
endif()

2
libsolc/CMakeLists.txt
View File

@ -2,7 +2,7 @@ if (EMSCRIPTEN)
# Specify which functions to export in soljson.js.
# Note that additional Emscripten-generated methods needed by solc-js are
# defined to be exported in cmake/EthCompilerSettings.cmake.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s EXPORTED_FUNCTIONS='[\"_solidity_license\",\"_solidity_version\",\"_solidity_compile\",\"_solidity_alloc\",\"_solidity_free\",\"_solidity_reset\"]'")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s EXPORTED_FUNCTIONS='[\"_solidity_license\",\"_solidity_version\",\"_solidity_compile\",\"_solidity_alloc\",\"_solidity_free\",\"_solidity_reset\"]'")
add_executable(soljson libsolc.cpp libsolc.h)
target_link_libraries(soljson PRIVATE solidity)
else()