From 5baac8470be4b82d53939e260d40f38d2fc15e6e Mon Sep 17 00:00:00 2001
From: Daniel Kirchner <daniel@ekpyron.org>
Date: Wed, 11 Jul 2018 17:15:03 +0200
Subject: [PATCH] Use emscripten 1.38.8 on both travis and circle.

---
 .circleci/config.yml                          | 2 +-
 .travis.yml                                   | 2 +-
 Changelog.md                                  | 1 +
 cmake/EthCompilerSettings.cmake               | 5 +++++
 libsolc/CMakeLists.txt                        | 3 +++
 scripts/build_emscripten.sh                   | 2 +-
 scripts/travis-emscripten/build_emscripten.sh | 8 ++++----
 7 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 66fe64302..52bb36cff 100644
--- a/.circleci/config.yml
+++ b/.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:
diff --git a/.travis.yml b/.travis.yml
index 2036f03ec..a8a68aff6 100644
--- a/.travis.yml
+++ b/.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
diff --git a/Changelog.md b/Changelog.md
index 7668daa63..79ec90a09 100644
--- a/Changelog.md
+++ b/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)
diff --git a/cmake/EthCompilerSettings.cmake b/cmake/EthCompilerSettings.cmake
index 8ffdfeb03..d05ccaffa 100644
--- a/cmake/EthCompilerSettings.cmake
+++ b/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()
 
diff --git a/libsolc/CMakeLists.txt b/libsolc/CMakeLists.txt
index dfdf81628..7fb4aa050 100644
--- a/libsolc/CMakeLists.txt
+++ b/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)
diff --git a/scripts/build_emscripten.sh b/scripts/build_emscripten.sh
index 14c497aea..46521cc57 100755
--- a/scripts/build_emscripten.sh
+++ b/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
diff --git a/scripts/travis-emscripten/build_emscripten.sh b/scripts/travis-emscripten/build_emscripten.sh
index 326774609..373f32dbc 100755
--- a/scripts/travis-emscripten/build_emscripten.sh
+++ b/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
-else
-    echo 'NODE_JS=["nodejs", "--stack_size=8192"]' > ~/.emscripten
+  mv /emsdk_portable/node/bin/node /emsdk_portable/node/bin/node_orig
+  echo -e '#!/bin/sh\nexec /emsdk_portable/node/bin/node_orig --stack-size=8192 $@' > /emsdk_portable/node/bin/node
+  chmod 755 /emsdk_portable/node/bin/node
 fi
 
 # Boost