From a20799b59a9c946c0a6cf5f16c30a84ad8555554 Mon Sep 17 00:00:00 2001
From: Calvin Rose <calsrose@gmail.com>
Date: Sun, 21 Oct 2018 12:44:58 -0400
Subject: [PATCH] Change build options for emscripten.

---
 Makefile                  | 3 ++-
 src/include/janet/janet.h | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 90ceb3db..561a2922 100644
--- a/Makefile
+++ b/Makefile
@@ -107,7 +107,8 @@ $(JANET_LIBRARY): $(JANET_CORE_OBJECTS)
 ######################
 
 EMCC=emcc
-EMCCFLAGS=-std=c99 -Wall -Wextra -Isrc/include -fpic -O2 -s EXTRA_EXPORTED_RUNTIME_METHODS='["cwrap"]'
+EMCCFLAGS=-std=c99 -Wall -Wextra -Isrc/include -fpic -O2 -s EXTRA_EXPORTED_RUNTIME_METHODS='["cwrap"]' \
+		  -s ALLOW_MEMORY_GROWTH=1 -s WASM=1
 JANET_EMTARGET=janet.js
 JANET_WEB_SOURCES=$(JANET_CORE_SOURCES) $(JANET_WEBCLIENT_SOURCES)
 JANET_EMOBJECTS=$(patsubst %.c,%.bc,$(JANET_WEB_SOURCES))
diff --git a/src/include/janet/janet.h b/src/include/janet/janet.h
index 0860a20b..1167a112 100644
--- a/src/include/janet/janet.h
+++ b/src/include/janet/janet.h
@@ -96,6 +96,8 @@ extern "C" {
 /* Check emscripten */
 #ifdef __EMSCRIPTEN__
 #define JANET_NO_DYNAMIC_MODULES
+#define JANET_NO_NANBOX
+#define JANET_WALIGN 8
 #endif
 
 /* Define how global janet state is declared */
@@ -180,11 +182,13 @@ extern "C" {
 #endif
 
 /* Alignment for pointers */
+#ifndef JANET_WALIGN
 #ifdef JANET_32
 #define JANET_WALIGN 4
 #else
 #define JANET_WALIGN 8
 #endif
+#endif
 
 /***** END SECTION CONFIG *****/