build: Create .la library for bitcoincrypto

Libtool will yell at you if you try to link a shared library against
static ones.

This change creates a libtool archive library for bitcoincrypto and
allows a shared library to be linked against it portably.

Also specify -static in both:

- ..._la_CXXFLAGS so that libtool will avoid building two versions of
  each object (one PIC, one non-PIC). We just need the one that is
  suitable for static linking.
- ..._la_LDFLAGS so that libtool will create a static library.

[META] This change is done in preparation for a future commit where we
       link the libbitcoinkernel library against this one.

Author: dongcarl

src/Makefile.am

@@ -15,14 +15,22 @@ AM_LIBTOOLFLAGS = --preserve-dup-deps
 PTHREAD_FLAGS = $(PTHREAD_CFLAGS) $(PTHREAD_LIBS)
 EXTRA_LIBRARIES =
 
+lib_LTLIBRARIES = $(LIBBITCOINCONSENSUS)
+noinst_LTLIBRARIES =
+
+bin_PROGRAMS =
+noinst_PROGRAMS =
+TESTS =
+BENCHMARKS =
+
 BITCOIN_INCLUDES=-I$(builddir) -I$(srcdir)/$(MINISKETCH_INCLUDE_DIR_INT) -I$(srcdir)/secp256k1/include -I$(srcdir)/$(UNIVALUE_INCLUDE_DIR_INT) $(BDB_CPPFLAGS) $(BOOST_CPPFLAGS) $(LEVELDB_CPPFLAGS)
 
 LIBBITCOIN_NODE=libbitcoin_node.a
 LIBBITCOIN_COMMON=libbitcoin_common.a
 LIBBITCOIN_CONSENSUS=libbitcoin_consensus.a
 LIBBITCOIN_CLI=libbitcoin_cli.a
 LIBBITCOIN_UTIL=libbitcoin_util.a
-LIBBITCOIN_CRYPTO_BASE=crypto/libbitcoin_crypto_base.a
+LIBBITCOIN_CRYPTO_BASE=crypto/libbitcoin_crypto_base.la
 LIBBITCOINQT=qt/libbitcoinqt.a
 LIBSECP256K1=secp256k1/libsecp256k1.la
 
@@ -37,31 +45,31 @@ LIBBITCOIN_WALLET=libbitcoin_wallet.a
 LIBBITCOIN_WALLET_TOOL=libbitcoin_wallet_tool.a
 endif
 
-LIBBITCOIN_CRYPTO= $(LIBBITCOIN_CRYPTO_BASE)
+LIBBITCOIN_CRYPTO = $(LIBBITCOIN_CRYPTO_BASE)
 if ENABLE_SSE41
-LIBBITCOIN_CRYPTO_SSE41 = crypto/libbitcoin_crypto_sse41.a
+LIBBITCOIN_CRYPTO_SSE41 = crypto/libbitcoin_crypto_sse41.la
 LIBBITCOIN_CRYPTO += $(LIBBITCOIN_CRYPTO_SSE41)
 endif
 if ENABLE_AVX2
-LIBBITCOIN_CRYPTO_AVX2 = crypto/libbitcoin_crypto_avx2.a
+LIBBITCOIN_CRYPTO_AVX2 = crypto/libbitcoin_crypto_avx2.la
 LIBBITCOIN_CRYPTO += $(LIBBITCOIN_CRYPTO_AVX2)
 endif
 if ENABLE_X86_SHANI
-LIBBITCOIN_CRYPTO_X86_SHANI = crypto/libbitcoin_crypto_x86_shani.a
+LIBBITCOIN_CRYPTO_X86_SHANI = crypto/libbitcoin_crypto_x86_shani.la
 LIBBITCOIN_CRYPTO += $(LIBBITCOIN_CRYPTO_X86_SHANI)
 endif
 if ENABLE_ARM_SHANI
-LIBBITCOIN_CRYPTO_ARM_SHANI = crypto/libbitcoin_crypto_arm_shani.a
+LIBBITCOIN_CRYPTO_ARM_SHANI = crypto/libbitcoin_crypto_arm_shani.la
 LIBBITCOIN_CRYPTO += $(LIBBITCOIN_CRYPTO_ARM_SHANI)
 endif
+noinst_LTLIBRARIES += $(LIBBITCOIN_CRYPTO)
 
 $(LIBSECP256K1): $(wildcard secp256k1/src/*.h) $(wildcard secp256k1/src/*.c) $(wildcard secp256k1/include/*)
 	$(AM_V_at)$(MAKE) $(AM_MAKEFLAGS) -C $(@D) $(@F)
 
 # Make is not made aware of per-object dependencies to avoid limiting building parallelization
 # But to build the less dependent modules first, we manually select their order here:
 EXTRA_LIBRARIES += \
-  $(LIBBITCOIN_CRYPTO) \
   $(LIBBITCOIN_UTIL) \
   $(LIBBITCOIN_COMMON) \
   $(LIBBITCOIN_CONSENSUS) \
@@ -72,14 +80,6 @@ EXTRA_LIBRARIES += \
   $(LIBBITCOIN_WALLET_TOOL) \
   $(LIBBITCOIN_ZMQ)
 
-lib_LTLIBRARIES = $(LIBBITCOINCONSENSUS)
-noinst_LTLIBRARIES =
-
-bin_PROGRAMS =
-noinst_PROGRAMS =
-TESTS =
-BENCHMARKS =
-
 if BUILD_BITCOIND
   bin_PROGRAMS += bitcoind
 endif
@@ -462,9 +462,16 @@ libbitcoin_wallet_tool_a_SOURCES = \
   $(BITCOIN_CORE_H)
 
 # crypto primitives library
-crypto_libbitcoin_crypto_base_a_CPPFLAGS = $(AM_CPPFLAGS)
-crypto_libbitcoin_crypto_base_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
-crypto_libbitcoin_crypto_base_a_SOURCES = \
+crypto_libbitcoin_crypto_base_la_CPPFLAGS = $(AM_CPPFLAGS)
+
+# Specify -static in both CXXFLAGS and LDFLAGS so libtool will only build a
+# static version of this library. We don't need a dynamic version, and a dynamic
+# version can't be used on windows anyway because the library doesn't currently
+# export DLL symbols.
+crypto_libbitcoin_crypto_base_la_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS) -static
+crypto_libbitcoin_crypto_base_la_LDFLAGS = $(AM_LDFLAGS) -static
+
+crypto_libbitcoin_crypto_base_la_SOURCES = \
   crypto/aes.cpp \
   crypto/aes.h \
   crypto/chacha_poly_aead.h \
@@ -496,32 +503,44 @@ crypto_libbitcoin_crypto_base_a_SOURCES = \
   crypto/siphash.h
 
 if USE_ASM
-crypto_libbitcoin_crypto_base_a_SOURCES += crypto/sha256_sse4.cpp
+crypto_libbitcoin_crypto_base_la_SOURCES += crypto/sha256_sse4.cpp
 endif
 
-crypto_libbitcoin_crypto_sse41_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
-crypto_libbitcoin_crypto_sse41_a_CPPFLAGS = $(AM_CPPFLAGS)
-crypto_libbitcoin_crypto_sse41_a_CXXFLAGS += $(SSE41_CXXFLAGS)
-crypto_libbitcoin_crypto_sse41_a_CPPFLAGS += -DENABLE_SSE41
-crypto_libbitcoin_crypto_sse41_a_SOURCES = crypto/sha256_sse41.cpp
-
-crypto_libbitcoin_crypto_avx2_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
-crypto_libbitcoin_crypto_avx2_a_CPPFLAGS = $(AM_CPPFLAGS)
-crypto_libbitcoin_crypto_avx2_a_CXXFLAGS += $(AVX2_CXXFLAGS)
-crypto_libbitcoin_crypto_avx2_a_CPPFLAGS += -DENABLE_AVX2
-crypto_libbitcoin_crypto_avx2_a_SOURCES = crypto/sha256_avx2.cpp
-
-crypto_libbitcoin_crypto_x86_shani_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
-crypto_libbitcoin_crypto_x86_shani_a_CPPFLAGS = $(AM_CPPFLAGS)
-crypto_libbitcoin_crypto_x86_shani_a_CXXFLAGS += $(X86_SHANI_CXXFLAGS)
-crypto_libbitcoin_crypto_x86_shani_a_CPPFLAGS += -DENABLE_X86_SHANI
-crypto_libbitcoin_crypto_x86_shani_a_SOURCES = crypto/sha256_x86_shani.cpp
-
-crypto_libbitcoin_crypto_arm_shani_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
-crypto_libbitcoin_crypto_arm_shani_a_CPPFLAGS = $(AM_CPPFLAGS)
-crypto_libbitcoin_crypto_arm_shani_a_CXXFLAGS += $(ARM_SHANI_CXXFLAGS)
-crypto_libbitcoin_crypto_arm_shani_a_CPPFLAGS += -DENABLE_ARM_SHANI
-crypto_libbitcoin_crypto_arm_shani_a_SOURCES = crypto/sha256_arm_shani.cpp
+# See explanation for -static in crypto_libbitcoin_crypto_base_la's LDFLAGS and
+# CXXFLAGS above
+crypto_libbitcoin_crypto_sse41_la_LDFLAGS = $(AM_LDFLAGS) -static
+crypto_libbitcoin_crypto_sse41_la_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS) -static
+crypto_libbitcoin_crypto_sse41_la_CPPFLAGS = $(AM_CPPFLAGS)
+crypto_libbitcoin_crypto_sse41_la_CXXFLAGS += $(SSE41_CXXFLAGS)
+crypto_libbitcoin_crypto_sse41_la_CPPFLAGS += -DENABLE_SSE41
+crypto_libbitcoin_crypto_sse41_la_SOURCES = crypto/sha256_sse41.cpp
+
+# See explanation for -static in crypto_libbitcoin_crypto_base_la's LDFLAGS and
+# CXXFLAGS above
+crypto_libbitcoin_crypto_avx2_la_LDFLAGS = $(AM_LDFLAGS) -static
+crypto_libbitcoin_crypto_avx2_la_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS) -static
+crypto_libbitcoin_crypto_avx2_la_CPPFLAGS = $(AM_CPPFLAGS)
+crypto_libbitcoin_crypto_avx2_la_CXXFLAGS += $(AVX2_CXXFLAGS)
+crypto_libbitcoin_crypto_avx2_la_CPPFLAGS += -DENABLE_AVX2
+crypto_libbitcoin_crypto_avx2_la_SOURCES = crypto/sha256_avx2.cpp
+
+# See explanation for -static in crypto_libbitcoin_crypto_base_la's LDFLAGS and
+# CXXFLAGS above
+crypto_libbitcoin_crypto_x86_shani_la_LDFLAGS = $(AM_LDFLAGS) -static
+crypto_libbitcoin_crypto_x86_shani_la_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS) -static
+crypto_libbitcoin_crypto_x86_shani_la_CPPFLAGS = $(AM_CPPFLAGS)
+crypto_libbitcoin_crypto_x86_shani_la_CXXFLAGS += $(X86_SHANI_CXXFLAGS)
+crypto_libbitcoin_crypto_x86_shani_la_CPPFLAGS += -DENABLE_X86_SHANI
+crypto_libbitcoin_crypto_x86_shani_la_SOURCES = crypto/sha256_x86_shani.cpp
+
+# See explanation for -static in crypto_libbitcoin_crypto_base_la's LDFLAGS and
+# CXXFLAGS above
+crypto_libbitcoin_crypto_arm_shani_la_LDFLAGS = $(AM_LDFLAGS) -static
+crypto_libbitcoin_crypto_arm_shani_la_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS) -static
+crypto_libbitcoin_crypto_arm_shani_la_CPPFLAGS = $(AM_CPPFLAGS)
+crypto_libbitcoin_crypto_arm_shani_la_CXXFLAGS += $(ARM_SHANI_CXXFLAGS)
+crypto_libbitcoin_crypto_arm_shani_la_CPPFLAGS += -DENABLE_ARM_SHANI
+crypto_libbitcoin_crypto_arm_shani_la_SOURCES = crypto/sha256_arm_shani.cpp
 
 # consensus: shared between all executables that validate any consensus rules.
 libbitcoin_consensus_a_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
@@ -877,7 +896,7 @@ bitcoin_chainstate-clientversion.$(OBJEXT): obj/build.h
 # bitcoinconsensus library #
 if BUILD_BITCOIN_LIBS
 include_HEADERS = script/bitcoinconsensus.h
-libbitcoinconsensus_la_SOURCES = support/cleanse.cpp $(crypto_libbitcoin_crypto_base_a_SOURCES) $(libbitcoin_consensus_a_SOURCES)
+libbitcoinconsensus_la_SOURCES = support/cleanse.cpp $(crypto_libbitcoin_crypto_base_la_SOURCES) $(libbitcoin_consensus_a_SOURCES)
 
 libbitcoinconsensus_la_LDFLAGS = $(AM_LDFLAGS) -no-undefined $(RELDFLAGS)
 libbitcoinconsensus_la_LIBADD = $(LIBSECP256K1)