cmake: Build bitcoinkernel library

Co-authored-by: TheCharlatan <seb.kung@gmail.com>

CMakeLists.txt

@@ -74,6 +74,8 @@ option(BUILD_TESTS "Build test_bitcoin executable." ON)
 option(BUILD_TX "Build bitcoin-tx executable." ${BUILD_TESTS})
 option(BUILD_UTIL "Build bitcoin-util executable." ${BUILD_TESTS})
 
+option(BUILD_KERNEL_LIB "Build experimental bitcoinkernel library." OFF)
+
 option(ENABLE_WALLET "Enable wallet." ON)
 option(WITH_SQLITE "Enable SQLite wallet support." ${ENABLE_WALLET})
 if(WITH_SQLITE)
@@ -205,6 +207,7 @@ if(BUILD_FOR_FUZZING)
   set(BUILD_CLI OFF)
   set(BUILD_TX OFF)
   set(BUILD_UTIL OFF)
+  set(BUILD_KERNEL_LIB OFF)
   set(BUILD_WALLET_TOOL OFF)
   set(BUILD_GUI OFF)
   set(ENABLE_EXTERNAL_SIGNER OFF)
@@ -495,6 +498,7 @@ message("  bitcoin-cli ......................... ${BUILD_CLI}")
 message("  bitcoin-tx .......................... ${BUILD_TX}")
 message("  bitcoin-util ........................ ${BUILD_UTIL}")
 message("  bitcoin-wallet ...................... ${BUILD_WALLET_TOOL}")
+message("  libbitcoinkernel (experimental) ..... ${BUILD_KERNEL_LIB}")
 message("Optional features:")
 message("  wallet support ...................... ${ENABLE_WALLET}")
 if(ENABLE_WALLET)

src/CMakeLists.txt

@@ -349,6 +349,11 @@ if(BUILD_GUI)
 endif()
 
 
+if(BUILD_KERNEL_LIB)
+  add_subdirectory(kernel)
+endif()
+
+
 add_subdirectory(test/util)
 if(BUILD_BENCH)
   add_subdirectory(bench)

src/kernel/CMakeLists.txt

@@ -0,0 +1,99 @@
+# Copyright (c) 2024-present The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or https://opensource.org/license/mit/.
+
+# TODO: libbitcoinkernel is a work in progress consensus engine
+#       library, as more and more modules are decoupled from the
+#       consensus engine, this list will shrink to only those
+#       which are absolutely necessary.
+add_library(bitcoinkernel
+  bitcoinkernel.cpp
+  chain.cpp
+  checks.cpp
+  chainparams.cpp
+  coinstats.cpp
+  context.cpp
+  cs_main.cpp
+  disconnected_transactions.cpp
+  mempool_removal_reason.cpp
+  ../arith_uint256.cpp
+  ../chain.cpp
+  ../coins.cpp
+  ../compressor.cpp
+  ../consensus/merkle.cpp
+  ../consensus/tx_check.cpp
+  ../consensus/tx_verify.cpp
+  ../core_read.cpp
+  ../dbwrapper.cpp
+  ../deploymentinfo.cpp
+  ../deploymentstatus.cpp
+  ../flatfile.cpp
+  ../hash.cpp
+  ../logging.cpp
+  ../node/blockstorage.cpp
+  ../node/chainstate.cpp
+  ../node/utxo_snapshot.cpp
+  ../policy/feerate.cpp
+  ../policy/packages.cpp
+  ../policy/policy.cpp
+  ../policy/rbf.cpp
+  ../policy/settings.cpp
+  ../policy/truc_policy.cpp
+  ../pow.cpp
+  ../primitives/block.cpp
+  ../primitives/transaction.cpp
+  ../pubkey.cpp
+  ../random.cpp
+  ../randomenv.cpp
+  ../script/interpreter.cpp
+  ../script/script.cpp
+  ../script/script_error.cpp
+  ../script/sigcache.cpp
+  ../script/solver.cpp
+  ../signet.cpp
+  ../streams.cpp
+  ../support/lockedpool.cpp
+  ../sync.cpp
+  ../txdb.cpp
+  ../txmempool.cpp
+  ../uint256.cpp
+  ../util/chaintype.cpp
+  ../util/check.cpp
+  ../util/feefrac.cpp
+  ../util/fs.cpp
+  ../util/fs_helpers.cpp
+  ../util/hasher.cpp
+  ../util/moneystr.cpp
+  ../util/rbf.cpp
+  ../util/serfloat.cpp
+  ../util/signalinterrupt.cpp
+  ../util/strencodings.cpp
+  ../util/string.cpp
+  ../util/syserror.cpp
+  ../util/threadnames.cpp
+  ../util/time.cpp
+  ../util/tokenpipe.cpp
+  ../validation.cpp
+  ../validationinterface.cpp
+  ../versionbits.cpp
+)
+target_link_libraries(bitcoinkernel
+  PRIVATE
+    core_interface
+    bitcoin_clientversion
+    bitcoin_crypto
+    leveldb
+    secp256k1
+  PUBLIC
+    Boost::headers
+)
+
+# libbitcoinkernel requires default symbol visibility, explicitly
+# specify that here so that things still work even when user
+# configures with -DREDUCE_EXPORTS=ON
+#
+# Note this is a quick hack that will be removed as we
+# incrementally define what to export from the library.
+set_target_properties(bitcoinkernel PROPERTIES
+  CXX_VISIBILITY_PRESET default
+)