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authorAlex Beregszaszi <alex@rtfs.hu>2017-07-19 04:57:47 +0800
committerAlex Beregszaszi <alex@rtfs.hu>2017-07-19 04:59:32 +0800
commit5050164d9e55a8f7ab437bd0983eb0a2e25ca6b1 (patch)
tree33ba87e5ec8c9cf3bbd5bd0b20d8c9fb7c655318 /cmake
parent01fbc636239f78134b37f9dedeacf40455ee2e0c (diff)
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Add comments to Emscripten flags
Diffstat (limited to 'cmake')
-rw-r--r--cmake/EthCompilerSettings.cmake24
1 files changed, 20 insertions, 4 deletions
diff --git a/cmake/EthCompilerSettings.cmake b/cmake/EthCompilerSettings.cmake
index ea3b185a..43317ae1 100644
--- a/cmake/EthCompilerSettings.cmake
+++ b/cmake/EthCompilerSettings.cmake
@@ -160,10 +160,26 @@ if (("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") OR ("${CMAKE_CXX_COMPILER_ID}" MA
endif()
if (EMSCRIPTEN)
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --memory-init-file 0 -O3 -s LINKABLE=1 -s DISABLE_EXCEPTION_CATCHING=0 -s NO_EXIT_RUNTIME=1 -s ALLOW_MEMORY_GROWTH=1 -s NO_DYNAMIC_EXECUTION=1")
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdata-sections -ffunction-sections -Wl,--gc-sections")
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
- set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s NO_FILESYSTEM=1 -s AGGRESSIVE_VARIABLE_ELIMINATION=1")
+ # Do emit a separate memory initialiser file
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --memory-init-file 0")
+ # Leave only exported symbols as public and agressively remove others
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdata-sections -ffunction-sections -Wl,--gc-sections -fvisibility=hidden")
+ # Optimisation level
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
+ # Keep every public symbols (disables dead code elimination)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s LINKABLE=1")
+ # Re-enable exception catching (optimisations above -O1 disable it)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s DISABLE_EXCEPTION_CATCHING=0")
+ # Remove any code related to exit (such as atexit)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s NO_EXIT_RUNTIME=1")
+ # Remove any code related to filesystem access
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s NO_FILESYSTEM=1")
+ # Remove variables even if it needs to be duplicated (can improve speed at the cost of size)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s AGGRESSIVE_VARIABLE_ELIMINATION=1")
+ # Allow memory growth, but disable some optimisations
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s ALLOW_MEMORY_GROWTH=1")
+ # Disable eval()
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s NO_DYNAMIC_EXECUTION=1")
add_definitions(-DETH_EMSCRIPTEN=1)
endif()
endif()