Update to Emscripten 3.1.64 (#589)

* Update to Emscripten 3.1.52

3.1.52 no longer allows using .bc, so use .o instead. Using .a throws
"Unknown format, not a static library!".

* Upgrade to Emscripten 3.1.64

v3.1.55 removed the --memory-init-file option, and this caused the build
to fail with "emcc: error: --memory-init-file is no longer supported".

Fixed by removing the option from Makefile.

.devcontainer/Dockerfile

@@ -24,7 +24,7 @@ FROM mcr.microsoft.com/vscode/devcontainers/typescript-node:0-${VARIANT}
 # Install EMSDK to /emsdk just like the EMSDK Dockerfile: https://github.com/emscripten-core/emsdk/blob/master/docker/Dockerfile
 ENV EMSDK /emsdk
 # We pin the EMSDK version rather than 'latest' so that everyone is using the same compiler version
-ENV EMSCRIPTEN_VERSION 3.1.51
+ENV EMSCRIPTEN_VERSION 3.1.64
 
 RUN git clone https://github.com/emscripten-core/emsdk.git $EMSDK
 

Makefile

@@ -30,7 +30,6 @@ SQLITE_COMPILATION_FLAGS = \
 # Since tihs is a library and not a standalone executable, we don't want to catch unhandled Node process exceptions
 # So, we do : `NODEJS_CATCH_EXIT=0`, which fixes issue: https://github.com/sql-js/sql.js/issues/173 and https://github.com/sql-js/sql.js/issues/262
 EMFLAGS = \
-	--memory-init-file 0 \
 	-s RESERVED_FUNCTION_POINTERS=64 \
 	-s ALLOW_TABLE_GROWTH=1 \
 	-s EXPORTED_FUNCTIONS=@src/exported_functions.json \
@@ -60,7 +59,7 @@ EMFLAGS_DEBUG = \
 	-s ASSERTIONS=2 \
 	-O1
 
-BITCODE_FILES = out/sqlite3.bc out/extension-functions.bc
+BITCODE_FILES = out/sqlite3.o out/extension-functions.o
 
 OUTPUT_WRAPPER_FILES = src/shell-pre.js src/shell-post.js
 
@@ -143,13 +142,13 @@ dist/worker.sql-wasm-debug.js: dist/sql-wasm-debug.js src/worker.js
 # 	#mv out/sql-wasm-debug.wasm dist/sql-wasm-debug.wasm
 # 	rm out/tmp-raw.js
 
-out/sqlite3.bc: sqlite-src/$(SQLITE_AMALGAMATION)
+out/sqlite3.o: sqlite-src/$(SQLITE_AMALGAMATION)
 	mkdir -p out
 	# Generate llvm bitcode
 	$(EMCC) $(SQLITE_COMPILATION_FLAGS) -c sqlite-src/$(SQLITE_AMALGAMATION)/sqlite3.c -o $@
 
 # Since the extension-functions.c includes other headers in the sqlite_amalgamation, we declare that this depends on more than just extension-functions.c
-out/extension-functions.bc: sqlite-src/$(SQLITE_AMALGAMATION)
+out/extension-functions.o: sqlite-src/$(SQLITE_AMALGAMATION)
 	mkdir -p out
 	# Generate llvm bitcode
 	$(EMCC) $(SQLITE_COMPILATION_FLAGS) -c sqlite-src/$(SQLITE_AMALGAMATION)/extension-functions.c -o $@