Add SecureRandom (#473)

* Add SecureRandom
* Add CMake support for building src/support

1 files changed, 33 insertions, 0 deletions

diff --git a/Firestore/src/support/port.h b/Firestore/src/support/port.h
new file mode 100644
index 0000000..6af898a
--- /dev/null
+++ b/Firestore/src/support/port.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FIRESTORE_SRC_SUPPORT_PORT_H_
+#define FIRESTORE_SRC_SUPPORT_PORT_H_
+
+#if defined(__APPLE__)
+// On Apple platforms we support building via Cocoapods without CMake. When
+// building this way we can't test the presence of features so predefine all
+// the platform-support feature macros to their expected values.
+
+// All supported Apple platforms have arc4random(3).
+#define HAVE_ARC4RANDOM 1
+
+#else
+
+#error "Unknown platform."
+#endif  // defined(__APPLE__)
+
+#endif  // FIRESTORE_SRC_SUPPORT_PORT_H_