Merge pull request #4114

bfb154e Update build instructions for Berkeley DB (Wladimir J. van der Laan)
d0a2e2e Log BerkeleyDB version at startup (Wladimir J. van der Laan)

Author: laanwj

doc/build-unix.md

@@ -133,17 +133,33 @@ miniupnpc
 
 Berkeley DB
 -----------
-You need Berkeley DB 4.8.  If you have to build it yourself:
-
-	wget 'http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz'
-	echo '12edc0df75bf9abd7f82f821795bcee50f42cb2e5f76a6a281b85732798364ef  db-4.8.30.NC.tar.gz' | sha256sum -c
-	# -> db-4.8.30.NC.tar.gz: OK
-	tar -xzvf db-4.8.30.NC.tar.gz
-	cd build_unix/
-	../dist/configure --enable-cxx
-	make
-	sudo make install
+It is recommended to use Berkeley DB 4.8. If you have to build it yourself:
+
+```bash
+BITCOIN_ROOT=$(pwd)
+
+# Pick some path to install BDB to, here we create a directory within the bitcoin directory
+BDB_PREFIX="${BITCOIN_ROOT}/db4"
+mkdir -p $BDB_PREFIX
+
+# Fetch the source and verify that it is not tampered with
+wget 'http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz'
+echo '12edc0df75bf9abd7f82f821795bcee50f42cb2e5f76a6a281b85732798364ef  db-4.8.30.NC.tar.gz' | sha256sum -c
+# -> db-4.8.30.NC.tar.gz: OK
+tar -xzvf db-4.8.30.NC.tar.gz
+
+# Build the library and install to our prefix
+cd db-4.8.30.NC/build_unix/
+#  Note: Do a static build so that it can be embedded into the exectuable, instead of having to find a .so at runtime
+../dist/configure --enable-cxx --disable-shared --with-pic --prefix=$BDB_PREFIX
+make install
+
+# Configure Bitcoin Core to use our own-built instance of BDB
+cd $BITCOIN_ROOT
+./configure (other args...) LDFLAGS="-L${BDB_PREFIX}/lib/" CPPFLAGS="-I${BDB_PREFIX}/include/"
+```
 
+**Note**: You only need Berkeley DB if the wallet is enabled (see the section *Disable-Wallet mode* below).
 
 Boost
 -----

src/init.cpp

@@ -603,6 +603,9 @@ bool AppInit2(boost::thread_group& threadGroup)
     LogPrintf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
     LogPrintf("Bitcoin version %s (%s)\n", FormatFullVersion(), CLIENT_DATE);
     LogPrintf("Using OpenSSL version %s\n", SSLeay_version(SSLEAY_VERSION));
+#ifdef ENABLE_WALLET
+    LogPrintf("Using BerkeleyDB version %s\n", DbEnv::version(0, 0, 0));
+#endif
     if (!fLogTimestamps)
         LogPrintf("Startup time: %s\n", DateTimeStrFormat("%Y-%m-%d %H:%M:%S", GetTime()));
     LogPrintf("Default data directory %s\n", GetDefaultDataDir().string());