Merge remote-tracking branch 'zcash/master' into rebase2

# Conflicts:
#	.travis.yml
#	Makefile.am
#	README.md
#	configure.ac
#	depends/Makefile
#	depends/builders/darwin.mk
#	depends/funcs.mk
#	depends/hosts/darwin.mk
#	depends/packages/googlemock.mk
#	depends/packages/googletest.mk
#	depends/packages/libsnark.mk
#	depends/packages/libsodium.mk
#	depends/packages/packages.mk
#	depends/packages/rust.mk
#	src/Makefile.am
#	src/Makefile.gtest.include
#	src/chainparams.cpp
#	src/chainparams.h
#	src/checkpoints.h
#	src/clientversion.h
#	src/coins.cpp
#	src/consensus/consensus.h
#	src/gtest/test_mempool.cpp
#	src/httprpc.cpp
#	src/init.cpp
#	src/komodo-tx.cpp
#	src/main.cpp
#	src/miner.cpp
#	src/policy/fees.cpp
#	src/policy/fees.h
#	src/rpcmining.cpp
#	src/rpcrawtransaction.cpp
#	src/rpcserver.cpp
#	src/test/policyestimator_tests.cpp
#	src/test/rpc_wallet_tests.cpp
#	src/test/transaction_tests.cpp
#	src/txdb.cpp
#	src/txmempool.cpp
#	src/wallet/asyncrpcoperation_sendmany.cpp
#	src/wallet/rpcwallet.cpp
#	src/wallet/wallet.cpp
#	src/wallet/wallet.h
#	src/zcash/CreateJoinSplit.cpp
#	zcutil/build.sh

depends/packages/bdb.mk

@@ -9,6 +9,12 @@ define $(package)_set_vars
 $(package)_config_opts=--disable-shared --enable-cxx --disable-replication
 $(package)_config_opts_mingw32=--enable-mingw
 $(package)_config_opts_linux=--with-pic
+$(package)_cxxflags=-std=c++11
+endef
+
+define $(package)_preprocess_cmds
+  sed -i.old 's/__atomic_compare_exchange\\(/__atomic_compare_exchange_db(/' src/dbinc/atomic.h && \
+  sed -i.old 's/atomic_init/atomic_init_db/' src/dbinc/atomic.h src/mp/mp_region.c src/mp/mp_mvcc.c src/mp/mp_fget.c src/mutex/mut_method.c src/mutex/mut_tas.c
 endef
 
 define $(package)_config_cmds