avoid redirection for math funcs

2 files changed, 7 insertions, 5 deletions

diff --git a/src/jsifier.js b/src/jsifier.js
index 32b284ad..1f432afc 100644
--- a/src/jsifier.js
+++ b/src/jsifier.js
@@ -198,7 +198,9 @@ function JSify(data) {
       if (shortident in Library) {
         var snippet = Library[shortident];
         if (typeof snippet === 'string') {
-          snippet = Library[snippet]; // redirection for aliases
+          if (Library[snippet]) {
+            snippet = Library[snippet]; // redirection for aliases
+          }
         }
         item.JS = item.ident + ' = ' + snippet.toString();
       } else {
diff --git a/src/library.js b/src/library.js
index 0663d6c1..fc9e34c6 100644
--- a/src/library.js
+++ b/src/library.js
@@ -180,10 +180,10 @@ var Library = {
 
   // math.h
 
-  cos: function(x) { return Math.cos(x) },
-  sin: function(x) { return Math.sin(x) },
-  sqrt: function(x) { return Math.sqrt(x) },
-  llvm_sqrt_f64: 'sqrt',
+  cos: 'Math.cos',
+  sin: 'Math.sin',
+  sqrt: 'Math.sqrt',
+  llvm_sqrt_f64: 'Math.sqrt',
 
   // unistd.h