Use emscripten 1.38.8 on both travis and circle.

.circleci/config.yml

@@ -34,7 +34,7 @@ version: 2
 jobs:
   build_emscripten:
     docker:
-      - image: trzeci/emscripten:sdk-tag-1.37.21-64bit
+      - image: trzeci/emscripten:sdk-tag-1.38.8-64bit
     environment:
       TERM: xterm
     steps:

.travis.yml

@@ -114,7 +114,7 @@ matrix:
           before_install:
               - nvm install 8
               - nvm use 8
-              - docker pull trzeci/emscripten:sdk-tag-1.37.21-64bit
+              - docker pull trzeci/emscripten:sdk-tag-1.38.8-64bit
           env:
               - SOLC_EMSCRIPTEN=On
               - SOLC_INSTALL_DEPS_TRAVIS=Off

Changelog.md

@@ -14,6 +14,7 @@ Bugfixes:
 
 
 Build System:
+ * Emscripten: Upgrade to emscripten 1.38.8 on travis and circleci.
 
 
 ### 0.5.2 (2018-12-19)

cmake/EthCompilerSettings.cmake

@@ -100,6 +100,11 @@ if (("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU") OR ("${CMAKE_CXX_COMPILER_ID}" MA
 			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s ERROR_ON_UNDEFINED_SYMBOLS=1")
 			# Disallow deprecated emscripten build options.
 			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_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 "${CMAKE_CXX_FLAGS} -s EXTRA_EXPORTED_RUNTIME_METHODS=['cwrap','addFunction','removeFunction','Pointer_stringify','lengthBytesUTF8','_malloc','stringToUTF8','setValue']")
+			# Do not build as a WebAssembly target - we need an asm.js output.
+			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s WASM=0")
 		endif()
 	endif()
 

libsolc/CMakeLists.txt

@@ -1,4 +1,7 @@
 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\"]' -s RESERVED_FUNCTION_POINTERS=20")
 	add_executable(soljson libsolc.cpp libsolc.h)
 	target_link_libraries(soljson PRIVATE solidity)

scripts/build_emscripten.sh

@@ -30,5 +30,5 @@ set -e
 
 if [[ "$OSTYPE" != "darwin"* ]]; then
     ./scripts/travis-emscripten/install_deps.sh
-    docker run -v $(pwd):/root/project -w /root/project trzeci/emscripten:sdk-tag-1.37.21-64bit ./scripts/travis-emscripten/build_emscripten.sh
+    docker run -v $(pwd):/root/project -w /root/project trzeci/emscripten:sdk-tag-1.38.8-64bit ./scripts/travis-emscripten/build_emscripten.sh
 fi

scripts/travis-emscripten/build_emscripten.sh

@@ -49,11 +49,11 @@ fi
 WORKSPACE=/root/project
 
 # Increase nodejs stack size
-if [ -e ~/.emscripten ]
+if ! [ -e /emsdk_portable/node/bin/node_orig ]
 then
-    sed -i -e 's/NODE_JS="nodejs"/NODE_JS=["nodejs", "--stack_size=8192"]/' ~/.emscripten
+  mv /emsdk_portable/node/bin/node /emsdk_portable/node/bin/node_orig
-else
+  echo -e '#!/bin/sh\nexec /emsdk_portable/node/bin/node_orig --stack-size=8192 $@' > /emsdk_portable/node/bin/node
-    echo 'NODE_JS=["nodejs", "--stack_size=8192"]' > ~/.emscripten
+  chmod 755 /emsdk_portable/node/bin/node
 fi
 
 # Boost