fix compatibility with newer versions of emscripten

Makefile

@@ -31,7 +31,7 @@ JS_ASMJS_TARGET := javascript/olm_legacy.js
 WASM_TARGET := $(BUILD_DIR)/wasm/libolm.a
 
 JS_EXPORTED_FUNCTIONS := javascript/exported_functions.json
-JS_EXPORTED_RUNTIME_METHODS := [ALLOC_STACK]
+JS_EXPORTED_RUNTIME_METHODS := [ALLOC_STACK,writeAsciiToMemory,intArrayFromString]
 JS_EXTERNS := javascript/externs.js
 
 PUBLIC_HEADERS := include/olm/olm.h include/olm/outbound_group_session.h include/olm/inbound_group_session.h include/olm/pk.h include/olm/sas.h include/olm/error.h include/olm/olm_export.h
@@ -106,7 +106,7 @@ EMCCFLAGS = --closure 1 --memory-init-file 0 -s NO_FILESYSTEM=1 -s INVOKE_RUN=0
 # we don't use this for the legacy build.)
 EMCCFLAGS_WASM += -s TOTAL_STACK=65536 -s TOTAL_MEMORY=262144 -s ALLOW_MEMORY_GROWTH
 
-EMCCFLAGS_ASMJS += -s WASM=0
+EMCCFLAGS_ASMJS += -s WASM=0 -Wno-error=closure
 
 EMCC.c = $(EMCC) $(CFLAGS) $(CPPFLAGS) -c -DNDEBUG -DOLM_STATIC_DEFINE=1
 EMCC.cc = $(EMCC) $(CXXFLAGS) $(CPPFLAGS) -c -DNDEBUG -DOLM_STATIC_DEFINE=1

javascript/olm_inbound_group_session.js

@@ -1,3 +1,4 @@
+/** @constructor */
 function InboundGroupSession() {
     var size = Module['_olm_inbound_group_session_size']();
     this.buf = malloc(size);

javascript/olm_outbound_group_session.js

@@ -1,3 +1,4 @@
+/** @constructor */
 function OutboundGroupSession() {
     var size = Module['_olm_outbound_group_session_size']();
     this.buf = malloc(size);

javascript/olm_pk.js

@@ -1,3 +1,4 @@
+/** @constructor */
 function PkEncryption() {
     var size = Module['_olm_pk_encryption_size']();
     this.buf = malloc(size);
@@ -98,6 +99,7 @@ PkEncryption.prototype['encrypt'] = restore_stack(function(
 });
 
 
+/** @constructor */
 function PkDecryption() {
     var size = Module['_olm_pk_decryption_size']();
     this.buf = malloc(size);
@@ -273,6 +275,7 @@ PkDecryption.prototype['decrypt'] = restore_stack(function (
 })
 
 
+/** @constructor */
 function PkSigning() {
     var size = Module['_olm_pk_signing_size']();
     this.buf = malloc(size);

javascript/olm_post.js

@@ -44,6 +44,7 @@ function bzero(ptr, n) {
     }
 }
 
+/** @constructor */
 function Account() {
     var size = Module['_olm_account_size']();
     this.buf = malloc(size);
@@ -244,6 +245,7 @@ Account.prototype['unpickle'] = restore_stack(function(key, pickle) {
     }
 });
 
+/** @constructor */
 function Session() {
     var size = Module['_olm_session_size']();
     this.buf = malloc(size);
@@ -530,6 +532,7 @@ Session.prototype['describe'] = restore_stack(function() {
     }
 });
 
+/** @constructor */
 function Utility() {
     var size = Module['_olm_utility_size']();
     this.buf = malloc(size);

javascript/olm_sas.js

@@ -1,3 +1,4 @@
+/** @constructor */
 function SAS() {
     var size = Module['_olm_sas_size']();
     var random_length = Module['_olm_create_sas_random_length']();