blocks: use auto-generated .c files instead of 'LD -r -b binary'

src/blocks/blocks.cpp

@@ -0,0 +1,31 @@
+#include "blocks.h"
+
+#include <unordered_map>
+
+extern const unsigned char checkpoints[];
+extern const size_t checkpoints_len;
+extern const unsigned char stagenet_blocks[];
+extern const size_t stagenet_blocks_len;
+extern const unsigned char testnet_blocks[];
+extern const size_t testnet_blocks_len;
+
+namespace blocks
+{
+
+  const std::unordered_map<cryptonote::network_type, const epee::span<const unsigned char>, std::hash<size_t>> CheckpointsByNetwork = {
+    {cryptonote::network_type::MAINNET, {checkpoints, checkpoints_len}},
+    {cryptonote::network_type::STAGENET, {stagenet_blocks, stagenet_blocks_len}},
+    {cryptonote::network_type::TESTNET, {testnet_blocks, testnet_blocks_len}}
+  };
+
+  const epee::span<const unsigned char> GetCheckpointsData(cryptonote::network_type network)
+  {
+    const auto it = CheckpointsByNetwork.find(network);
+    if (it != CheckpointsByNetwork.end())
+    {
+      return it->second;
+    }
+    return nullptr;
+  }
+
+}