build: add libbitcoinconsensus files and hook up the lib build

Credit BlueMatt for libbitcoinsonsensus.h/cpp

src/Makefile.am

@@ -49,6 +49,8 @@ BITCOIN_INCLUDES += $(BDB_CPPFLAGS)
 noinst_LIBRARIES += libbitcoin_wallet.a
 endif
 
+lib_LTLIBRARIES = libbitcoinconsensus.la
+
 bin_PROGRAMS =
 TESTS =
 
@@ -331,6 +333,35 @@ bitcoin_cli_SOURCES += bitcoin-cli-res.rc
 endif
 bitcoin_cli_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 
+if BUILD_BITCOIN_LIBS
+include_HEADERS = script/bitcoinconsensus.h
+libbitcoinconsensus_la_SOURCES = \
+  core/transaction.cpp \
+  crypto/sha1.cpp \
+  crypto/sha2.cpp \
+  crypto/ripemd160.cpp \
+  eccryptoverify.cpp \
+  ecwrapper.cpp \
+  hash.cpp \
+  pubkey.cpp \
+  script/script.cpp \
+  script/interpreter.cpp \
+  script/bitcoinconsensus.cpp \
+  uint256.cpp \
+  utilstrencodings.cpp
+
+if GLIBC_BACK_COMPAT
+  libbitcoinconsensus_la_SOURCES += compat/glibc_compat.cpp
+  libbitcoinconsensus_la_SOURCES += compat/glibcxx_compat.cpp
+endif
+
+libbitcoinconsensus_la_LDFLAGS = -no-undefined $(RELDFLAGS)
+libbitcoinconsensus_la_LIBADD = $(CRYPTO_LIBS)
+libbitcoinconsensus_la_CPPFLAGS = $(CRYPTO_CFLAGS) -I$(builddir)/obj -DBUILD_BITCOIN_INTERNAL
+if USE_LIBSECP256K1
+libbitcoinconsensus_la_LIBADD += secp256k1/libsecp256k1.la
+endif
+
 CLEANFILES = leveldb/libleveldb.a leveldb/libmemenv.a *.gcda *.gcno
 
 DISTCLEANFILES = obj/build.h