[Tensorflow] add helper script to check version, if tf is not install…

…ed or too old, return error

preinstall.sh

@@ -1,4 +1,17 @@
 #!/usr/bin/env bash
+# Build SSVM-Storage dependencies
 cd ./rust_native_storage_library/
 make target/debug/librust_native_storage_library.so
 cd ../
+
+# Check TensorFlow version
+c++ ./utils/checker/tensorflow_version_checker.cc -ltensorflow -o ./tf_ver
+./tf_ver
+if [ "$?" -eq "0" ]
+then
+  rm ./tf_ver
+  exit 0
+else
+  echo "TensorFlow C library is not yet installed or is too old to support"
+  exit 1
+fi

utils/checker/tensorflow_version_checker.cc

@@ -0,0 +1,42 @@
+#include <iostream>
+#include <string>
+#include <sstream>
+#include <tensorflow/c/c_api.h>
+
+struct Version {
+  int Major;
+  int Minor;
+  int Revision;
+  Version() = default;
+  Version(std::string Str) {
+    std::stringstream Ss(Str);
+    std::string Buffer;
+    // Major
+    std::getline(Ss, Buffer, '.');
+    Major = std::stoi(Buffer);
+    // Minor
+    std::getline(Ss, Buffer, '.');
+    Minor = std::stoi(Buffer);
+    // Revision
+    std::getline(Ss, Buffer, '.');
+    Revision = std::stoi(Buffer);
+  }
+  bool isTooOld() {
+    if (Major < 2) {
+      return true;
+    } else if (Major == 2 && Minor < 3) {
+      return true;
+    }
+    return false;
+  }
+};
+int main() {
+  std::string TFVer(TF_Version());
+  std::cout << "Your TensorFlow C library version: " << TFVer << "\n";
+  Version V(TFVer);
+  if (V.isTooOld()) {
+    std::cerr << "Your TensorFlow C library is too old. Please upgrade to >=2.3.0\n";
+    return 1;
+  }
+  return 0;
+}