Upgrade emscripten to 1.38.22

Makefile

@@ -68,8 +68,6 @@ build/pyodide.asm.js: src/main.bc src/jsimport.bc src/jsproxy.bc src/js2python.b
 	[ -d build ] || mkdir build
 	$(CXX) -s EXPORT_NAME="'pyodide'" -o build/pyodide.asm.html $(filter %.bc,$^) \
 	  $(LDFLAGS) -s FORCE_FILESYSTEM=1
-	rm build/pyodide.asm.asm.js
-	rm build/pyodide.asm.wasm.pre
 	rm build/pyodide.asm.html
 
 
@@ -149,7 +147,7 @@ build/test.data: $(CPYTHONLIB)
 	)
 	( \
 		cd build; \
-		python $(FILEPACKAGER) test.data --lz4 --preload ../$(CPYTHONLIB)/test@/lib/python3.7/test --js-output=test.js --export-name=pyodide._module --exclude \*.wasm.pre --exclude __pycache__ \
+		python $(FILEPACKAGER) test.data --lz4 --preload ../$(CPYTHONLIB)/test@/lib/python3.7/test --js-output=test.js --export-name=pyodide._module --exclude __pycache__ \
   )
 	uglifyjs build/test.js -o build/test.js
 
@@ -174,7 +172,6 @@ root/.built: \
 		cd root/lib/python$(PYMINOR); \
 		rm -fr `cat ../../../remove_modules.txt`; \
 		rm -fr test; \
-		find . -name "*.wasm.pre" -type f -delete ; \
 		find -type d -name __pycache__ -prune -exec rm -rf {} \; \
 	)
 	touch root/.built
@@ -185,7 +182,7 @@ ccache/emcc:
 	if hash ccache &>/dev/null; then \
     ln -s `which ccache` $(PYODIDE_ROOT)/ccache/emcc ; \
   else \
-    ln -s emsdk/emsdk/emscripten/tag-1.38.12/emcc $(PYODIDE_ROOT)/ccache/emcc; \
+    ln -s emsdk/emsdk/emscripten/tag-$(EMSCRIPTEN_VERSION)/emcc $(PYODIDE_ROOT)/ccache/emcc; \
   fi
 
 
@@ -194,7 +191,7 @@ ccache/em++:
 	if hash ccache &>/dev/null; then \
     ln -s `which ccache` $(PYODIDE_ROOT)/ccache/em++ ; \
   else \
-    ln -s emsdk/emsdk/emscripten/tag-1.38.12/em++ $(PYODIDE_ROOT)/ccache/em++; \
+    ln -s emsdk/emsdk/emscripten/tag-$(EMSCRIPTEN_VERSION)/em++ $(PYODIDE_ROOT)/ccache/em++; \
   fi
 
 

Makefile.envs

-export PATH := $(PYODIDE_ROOT)/ccache:$(PYODIDE_ROOT)/emsdk/emsdk:$(PYODIDE_ROOT)/emsdk/emsdk/clang/tag-e1.38.12/build_tag-e1.38.12_64/bin:$(PYODIDE_ROOT)/emsdk/emsdk/node/8.9.1_64bit/bin:$(PYODIDE_ROOT)/emsdk/emsdk/emscripten/tag-1.38.12:$(PYODIDE_ROOT)/emsdk/emsdk/binaryen/tag-1.38.12_64bit_binaryen/bin:$(PATH)
+export EMSCRIPTEN_VERSION = 1.38.22
+
+export PATH := $(PYODIDE_ROOT)/ccache:$(PYODIDE_ROOT)/emsdk/emsdk:$(PYODIDE_ROOT)/emsdk/emsdk/clang/tag-e$(EMSCRIPTEN_VERSION)/build_tag-e$(EMSCRIPTEN_VERSION)_64/bin:$(PYODIDE_ROOT)/emsdk/emsdk/node/8.9.1_64bit/bin:$(PYODIDE_ROOT)/emsdk/emsdk/emscripten/tag-$(EMSCRIPTEN_VERSION):$(PYODIDE_ROOT)/emsdk/emsdk/binaryen/tag-$(EMSCRIPTEN_VERSION)_64bit_binaryen/bin:$(PATH)
 
 export EMSDK = $(PYODIDE_ROOT)/emsdk/emsdk
 export EM_CONFIG = $(PYODIDE_ROOT)/emsdk/emsdk/.emscripten
 export EM_CACHE = $(PYODIDE_ROOT)/emsdk/emsdk/.emscripten_cache
-export EMSCRIPTEN = $(PYODIDE_ROOT)/emsdk/emsdk/emscripten/tag-1.38.12
-export BINARYEN_ROOT = $(PYODIDE_ROOT)/emsdk/emsdk/binaryen/tag-1.38.12_64bit_binaryen
+export EMSCRIPTEN = $(PYODIDE_ROOT)/emsdk/emsdk/emscripten/tag-$(EMSCRIPTEN_VERSION)
+export BINARYEN_ROOT = $(PYODIDE_ROOT)/emsdk/emsdk/binaryen/tag-$(EMSCRIPTEN_VERSION)_64bit_binaryen
 
 export PYVERSION=3.7.0
 export PYMINOR=$(basename $(PYVERSION))

emsdk/Makefile

+PYODIDE_ROOT=$(abspath ..)
+include ../Makefile.envs
+
 all: emsdk/.complete
 
 # We hack the CPU_CORES, because if you use all of the cores on Circle-CI, you
@@ -8,14 +11,15 @@ emsdk/.complete:
 	git clone https://github.com/juj/emsdk.git
 	sed -i -e "s#CPU_CORES = max(multiprocessing.cpu_count()-1, 1)#CPU_CORES = 3#g" emsdk/emsdk
 	( \
-		cd emsdk ; \
-		./emsdk install --build=Release sdk-tag-1.38.12-64bit binaryen-tag-1.38.12-64bit ; \
-		cd .. ; \
-		(cat patches/*.patch | patch -p1) ; \
-		cd emsdk/binaryen/tag-1.38.12_64bit_binaryen/ ; \
-    make ; \
-	  cd ../.. ; \
-		./emsdk activate --embedded --build=Release sdk-tag-1.38.12-64bit binaryen-tag-1.38.12-64bit ; \
+		cd emsdk && \
+		./emsdk install --build=Release sdk-tag-$(EMSCRIPTEN_VERSION)-64bit binaryen-tag-$(EMSCRIPTEN_VERSION)-64bit && \
+		cd .. && \
+		(cat patches/*.patch | patch -p1) && \
+		cd emsdk/binaryen/tag-$(EMSCRIPTEN_VERSION)_64bit_binaryen/ && \
+    make && \
+	  cd ../.. && \
+    cp binaryen/tag-$(EMSCRIPTEN_VERSION)/bin/wasm.js binaryen/tag-$(EMSCRIPTEN_VERSION)_64bit_binaryen/bin && \
+		./emsdk activate --embedded --build=Release sdk-tag-$(EMSCRIPTEN_VERSION)-64bit binaryen-tag-$(EMSCRIPTEN_VERSION)-64bit && \
     touch .complete \
 	)
 

emsdk/patches/lz4_c.patch

-diff --git a/emsdk/emscripten/tag-1.38.12/src/library_lz4.js b/emsdk/emscripten/tag-1.38.12/src/library_lz4.js
+diff --git a/emsdk/emscripten/tag-1.38.22/src/library_lz4.js b/emsdk/emscripten/tag-1.38.22/src/library_lz4.js
 index 4c3f583b7..5291002a4 100644
---- a/emsdk/emscripten/tag-1.38.12/src/library_lz4.js
-+++ b/emsdk/emscripten/tag-1.38.12/src/library_lz4.js
+--- a/emsdk/emscripten/tag-1.38.22/src/library_lz4.js
++++ b/emsdk/emscripten/tag-1.38.22/src/library_lz4.js
 @@ -5,26 +5,14 @@ mergeInto(LibraryManager.library, {
      DIR_MODE: {{{ cDefine('S_IFDIR') }}} | 511 /* 0777 */,
      FILE_MODE: {{{ cDefine('S_IFREG') }}} | 511 /* 0777 */,

emsdk/patches/num_params.patch

 diff --git a/emsdk/binaryen/master/src/passes/FuncCastEmulation.cpp b/emsdk/binaryen/master/src/passes/FuncCastEmulation.cpp
 index 013e9403..d95fc282 100644
---- a/emsdk/binaryen/tag-1.38.12/src/passes/FuncCastEmulation.cpp
-+++ b/emsdk/binaryen/tag-1.38.12/src/passes/FuncCastEmulation.cpp
+--- a/emsdk/binaryen/tag-1.38.22/src/passes/FuncCastEmulation.cpp
++++ b/emsdk/binaryen/tag-1.38.22/src/passes/FuncCastEmulation.cpp
 @@ -39,7 +39,7 @@ namespace wasm {
  // This should be enough for everybody. (As described above, we need this
  // to match when dynamically linking, and also dynamic linking is why we