add erf dep and testing

2 files changed, 4 insertions, 2 deletions

diff --git a/src/library.js b/src/library.js
index 1ba4f2fa..939da8b1 100644
--- a/src/library.js
+++ b/src/library.js
@@ -5439,6 +5439,7 @@ LibraryManager.library = {
     return (ONE_SQRTPI * Math.exp(- x * x) * q2);
   },
   erfcf: 'erfcf',
+  erf__deps: ['erfc'],
   erf: function (x) {
     var MATH_TOLERANCE = 1E-12;
     var TWO_SQRTPI = 1.128379167095512574;
diff --git a/tests/runner.py b/tests/runner.py
index 6b711939..c0e16632 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -3056,11 +3056,12 @@ Exiting setjmp function, level: 0, prev_jmp: -1
           main(void) {
            float (*fn)(float) = &sqrtf;
            float (*fn2)(float) = &fabsf;
-           printf("fn2(-5) = %d, fn(10) = %f\\n", (int)fn2(-5), fn(10));
+           float (*fn3)(float) = &erff;
+           printf("fn2(-5) = %d, fn(10) = %.2f, erf(10) = %.2f\\n", (int)fn2(-5), fn(10), fn3(10));
            return 0;
           }
           '''
-        self.do_run(src, 'fn2(-5) = 5, fn(10) = 3.16')
+        self.do_run(src, 'fn2(-5) = 5, fn(10) = 3.16, erf(10) = 1.00')
 
     def test_funcptrfunc(self):
       src = r'''