Roll forward to cl/338482889

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I9850950db8bd84f0904ea1a413151887f52098cf

cpp/platform/config/BUILD

@@ -0,0 +1,21 @@
+cc_library(
+    name = "config",
+    hdrs = [
+        "config.h",
+    ],
+    visibility = [
+        "//visibility:private",
+    ],
+)
+
+cc_library(
+    name = "string",
+    hdrs = [
+        "string.h",
+    ],
+    visibility = [
+    ],
+    deps = [
+        ":config",
+    ],
+)

cpp/platform/config/config.h

@@ -0,0 +1,22 @@
+#ifndef PLATFORM_CONFIG_CONFIG_H_
+#define PLATFORM_CONFIG_CONFIG_H_
+
+// Clients can modify this file to customize the Nearby C++ codebase as per
+// their particular constraints and environments.
+
+// Note: Every entry in this file should conform to the following format, to
+// give precedence to command-line options (-D) that set these symbols:
+//
+//   #ifndef XXX
+//   #define XXX 0/1
+//   #endif
+
+#ifndef NEARBY_USE_STD_STRING
+#define NEARBY_USE_STD_STRING 0
+#endif
+
+#ifndef NEARBY_USE_RTTI
+#define NEARBY_USE_RTTI 1
+#endif
+
+#endif  // PLATFORM_CONFIG_CONFIG_H_

cpp/platform/config/string.h

@@ -0,0 +1,12 @@
+#ifndef PLATFORM_CONFIG_STRING_H_
+#define PLATFORM_CONFIG_STRING_H_
+
+#include <string>
+
+#include "platform/config/config.h"
+
+#if NEARBY_USE_STD_STRING
+using std::string;
+#endif
+
+#endif  // PLATFORM_CONFIG_STRING_H_