Add BinaryenAddCustomSection API (#2381)

This adds a new BinaryenAddCustomSection API so a generator can add arbitrary
custom sections to a module.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/js/binaryen.js-post.js b/src/js/binaryen.js-post.js
index 03e57d3d5..7c99ded15 100644
--- a/src/js/binaryen.js-post.js
+++ b/src/js/binaryen.js-post.js
@@ -2105,6 +2105,11 @@ function wrapModule(module, self) {
   self['setFeatures'] = function(features) {
     Module['_BinaryenModuleSetFeatures'](module, features);
   };
+  self['addCustomSection'] = function(name, contents) {
+    return preserveStack(function() {
+      return Module['_BinaryenAddCustomSection'](module, strToStack(name), i8sToStack(contents), contents.length);
+    });
+  };
   self['emitText'] = function() {
     var old = out;
     var ret = '';