[build] Move dummy wallet into its own .cpp file.

Removes the ifdef ENABLE_WALLET from init.cpp.

src/Makefile.am

@@ -260,6 +260,10 @@ libbitcoin_server_a_SOURCES = \
   versionbits.cpp \
   $(BITCOIN_CORE_H)
 
+if !ENABLE_WALLET
+libbitcoin_server_a_SOURCES += dummywallet.cpp
+endif
+
 if ENABLE_ZMQ
 libbitcoin_zmq_a_CPPFLAGS = $(BITCOIN_INCLUDES) $(ZMQ_CFLAGS)
 libbitcoin_zmq_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)

src/dummywallet.cpp

@@ -0,0 +1,32 @@
+// Copyright (c) 2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <stdio.h>
+#include <util.h>
+#include <walletinitinterface.h>
+
+class DummyWalletInit : public WalletInitInterface {
+public:
+
+    void AddWalletOptions() const override;
+    bool ParameterInteraction() const override {return true;}
+    void RegisterRPC(CRPCTable &) const override {}
+    bool Verify() const override {return true;}
+    bool Open() const override {LogPrintf("No wallet support compiled in!\n"); return true;}
+    void Start(CScheduler& scheduler) const override {}
+    void Flush() const override {}
+    void Stop() const override {}
+    void Close() const override {}
+};
+
+void DummyWalletInit::AddWalletOptions() const
+{
+    std::vector<std::string> opts = {"-addresstype", "-changetype", "-disablewallet", "-discardfee=<amt>", "-fallbackfee=<amt>",
+        "-keypool=<n>", "-mintxfee=<amt>", "-paytxfee=<amt>", "-rescan", "-salvagewallet", "-spendzeroconfchange",  "-txconfirmtarget=<n>",
+        "-upgradewallet", "-wallet=<path>", "-walletbroadcast", "-walletdir=<dir>", "-walletnotify=<cmd>", "-walletrbf", "-zapwallettxes=<mode>",
+        "-dblogsize=<n>", "-flushwallet", "-privdb", "-walletrejectlongchains"};
+    gArgs.AddHiddenArgs(opts);
+}
+
+const WalletInitInterface& g_wallet_init_interface = DummyWalletInit();

src/init.cpp

@@ -74,33 +74,6 @@ static const bool DEFAULT_STOPAFTERBLOCKIMPORT = false;
 std::unique_ptr<CConnman> g_connman;
 std::unique_ptr<PeerLogicValidation> peerLogic;
 
-#if !(ENABLE_WALLET)
-class DummyWalletInit : public WalletInitInterface {
-public:
-
-    void AddWalletOptions() const override;
-    bool ParameterInteraction() const override {return true;}
-    void RegisterRPC(CRPCTable &) const override {}
-    bool Verify() const override {return true;}
-    bool Open() const override {LogPrintf("No wallet support compiled in!\n"); return true;}
-    void Start(CScheduler& scheduler) const override {}
-    void Flush() const override {}
-    void Stop() const override {}
-    void Close() const override {}
-};
-
-void DummyWalletInit::AddWalletOptions() const
-{
-    std::vector<std::string> opts = {"-addresstype", "-changetype", "-disablewallet", "-discardfee=<amt>", "-fallbackfee=<amt>",
-        "-keypool=<n>", "-mintxfee=<amt>", "-paytxfee=<amt>", "-rescan", "-salvagewallet", "-spendzeroconfchange",  "-txconfirmtarget=<n>",
-        "-upgradewallet", "-wallet=<path>", "-walletbroadcast", "-walletdir=<dir>", "-walletnotify=<cmd>", "-walletrbf", "-zapwallettxes=<mode>",
-        "-dblogsize=<n>", "-flushwallet", "-privdb", "-walletrejectlongchains"};
-    gArgs.AddHiddenArgs(opts);
-}
-
-const WalletInitInterface& g_wallet_init_interface = DummyWalletInit();
-#endif
-
 #ifdef WIN32
 // Win32 LevelDB doesn't use filedescriptors, and the ones used for
 // accessing block files don't count towards the fd_set size limit