diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index 22f7dcd4..1304795f 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -30,6 +30,7 @@
 #include <boost/filesystem.hpp>
 #include <memory>  // std::unique_ptr
 #include <cstring>  // memcpy
+#include <random>
 
 #include "cryptonote_core/cryptonote_format_utils.h"
 #include "crypto/crypto.h"
diff --git a/src/blocks/CMakeLists.txt b/src/blocks/CMakeLists.txt
index 0ad88538..4020132a 100644
--- a/src/blocks/CMakeLists.txt
+++ b/src/blocks/CMakeLists.txt
@@ -35,3 +35,4 @@ else()
     set_target_properties(blocks PROPERTIES LINKER_LANGUAGE C)
 endif()
 
+
diff --git a/src/blocks/blocks.dat b/src/blocks/blocks.dat
index 249956e7..e69de29b 100644
Binary files a/src/blocks/blocks.dat and b/src/blocks/blocks.dat differ
diff --git a/src/blocks/checkpoints.dat b/src/blocks/checkpoints.dat
new file mode 100644
index 00000000..249956e7
Binary files /dev/null and b/src/blocks/checkpoints.dat differ
diff --git a/src/cryptonote_core/CMakeLists.txt b/src/cryptonote_core/CMakeLists.txt
index 564dc321..6315fc4f 100644
--- a/src/cryptonote_core/CMakeLists.txt
+++ b/src/cryptonote_core/CMakeLists.txt
@@ -84,7 +84,7 @@ target_link_libraries(cryptonote_core
     ${Boost_PROGRAM_OPTIONS_LIBRARY}
     ${Boost_SERIALIZATION_LIBRARY}
   LINK_PRIVATE
-    ${Blocks} 
+    ${Blocks}  
     ${Boost_FILESYSTEM_LIBRARY}
     ${Boost_SYSTEM_LIBRARY}
     ${Boost_THREAD_LIBRARY}
diff --git a/src/cryptonote_core/tx_pool.cpp b/src/cryptonote_core/tx_pool.cpp
index 12fd3fe6..ac71a0e5 100644
--- a/src/cryptonote_core/tx_pool.cpp
+++ b/src/cryptonote_core/tx_pool.cpp
@@ -511,8 +511,8 @@ namespace cryptonote
       // Can not exceed maximum block size
       if (max_total_size < total_size + tx_it->second.blob_size)
       {
-        sorted_it++;
-        continue;
+    	sorted_it++;
+    	continue;
       }
 
       // If adding this tx will make the block size
@@ -522,8 +522,8 @@ namespace cryptonote
       // to propagate at 60s block times.
       if ( (total_size + tx_it->second.blob_size) > CRYPTONOTE_GETBLOCKTEMPLATE_MAX_BLOCK_SIZE )
       {
-        sorted_it++;
-        continue;
+    	sorted_it++;
+    	continue;
       }
 
       // If we've exceeded the penalty free size,
@@ -536,8 +536,8 @@ namespace cryptonote
       // missing key images
       if (!is_transaction_ready_to_go(tx_it->second) || have_key_images(k_images, tx_it->second.tx))
       {
-        sorted_it++;
-        continue;
+    	sorted_it++;
+    	continue;
       }
 
       bl.tx_hashes.push_back(tx_it->first);
diff --git a/src/daemon/CMakeLists.txt b/src/daemon/CMakeLists.txt
index 8275429d..90befa8d 100644
--- a/src/daemon/CMakeLists.txt
+++ b/src/daemon/CMakeLists.txt
@@ -27,8 +27,12 @@
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 set(blocksdat "")
-if(APPLE AND PER_BLOCK_CHECKPOINT)
-    add_custom_command(OUTPUT blocksdat.o COMMAND cd ${CMAKE_CURRENT_SOURCE_DIR} && ${CMAKE_C_COMPILER} -o stub.o -c stub.c COMMAND cd ${CMAKE_CURRENT_SOURCE_DIR} && ld -r -sectcreate __DATA __blocks_dat ../blocks/blocks.dat -o ${CMAKE_CURRENT_BINARY_DIR}/blocksdat.o stub.o)
+if(PER_BLOCK_CHECKPOINT)
+	if(APPLE)
+	    add_custom_command(OUTPUT blocksdat.o COMMAND cd ${CMAKE_CURRENT_SOURCE_DIR} && touch stub.c && ${CMAKE_C_COMPILER} -o stub.o -c stub.c COMMAND cd ${CMAKE_CURRENT_SOURCE_DIR} && ld -r -sectcreate __DATA __blocks_dat ../blocks/checkpoints.dat -o ${CMAKE_CURRENT_BINARY_DIR}/blocksdat.o stub.o && rm -f stub.*)
+	else()
+	    add_custom_command(OUTPUT blocksdat.o COMMAND cd ${CMAKE_CURRENT_SOURCE_DIR} && cp ../blocks/checkpoints.dat blocks.dat && ld -r -b binary -o ${CMAKE_CURRENT_BINARY_DIR}/blocksdat.o blocks.dat && rm -f blocks.dat)
+	endif()
     set(blocksdat "blocksdat.o")
 endif()