deps: hide zlib internal symbols

sam-github · sam-github · commit 1ae79202d0a3 · 2017-01-31T10:33:39.000-08:00
Use HAVE_HIDDEN when compiling zlib so it's internal symbols
have __attribute__((visibility ("hidden"))).
diff --git a/deps/zlib/zlib.gyp b/deps/zlib/zlib.gyp
@@ -48,6 +48,9 @@
               '.',
             ],
           },
+          'defines': [
+            'HAVE_HIDDEN',
+          ],
           'conditions': [
             ['OS!="win"', {
               'cflags!': [ '-ansi' ],
