Makefile: Fix shared library building on various OSes

Versioned for OS not in (Windows, Android), and create a .dll.a implib on Windows

Makefile

@@ -54,6 +54,7 @@ CFLAGS += -fsanitize=address
 LDFLAGS += -fsanitize=address
 endif
 
+SHAREDLIBVERSION=0
 include $(SRC_PATH)build/platform-$(OS).mk
 
 
@@ -179,33 +180,41 @@ endif
 endif
 
 ifneq (ios, $(OS))
-libraries: $(LIBPREFIX)$(PROJECT_NAME).$(LIBSUFFIX) $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX)
+libraries: $(LIBPREFIX)$(PROJECT_NAME).$(LIBSUFFIX) $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIXVER)
 else
 libraries: $(LIBPREFIX)$(PROJECT_NAME).$(LIBSUFFIX)
 endif
 
-LIBRARIES += $(LIBPREFIX)$(PROJECT_NAME).$(LIBSUFFIX) $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX)
+LIBRARIES += $(LIBPREFIX)$(PROJECT_NAME).$(LIBSUFFIX) $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIXVER)
 
 $(LIBPREFIX)$(PROJECT_NAME).$(LIBSUFFIX): $(ENCODER_OBJS) $(DECODER_OBJS) $(PROCESSING_OBJS) $(COMMON_OBJS)
 	$(QUIET)rm -f $@
 	$(QUIET_AR)$(AR) $(AR_OPTS) $+
 
-$(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX): $(ENCODER_OBJS) $(DECODER_OBJS) $(PROCESSING_OBJS) $(COMMON_OBJS)
+$(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIXVER): $(ENCODER_OBJS) $(DECODER_OBJS) $(PROCESSING_OBJS) $(COMMON_OBJS)
 	$(QUIET)rm -f $@
 	$(QUIET_CXX)$(CXX) $(SHARED) $(CXX_LINK_O) $+ $(LDFLAGS) $(SHLDFLAGS)
+	if [ "$(SHAREDLIBSUFFIXVER)" != "$(SHAREDLIBSUFFIX)" ]; then \
+		ln -sfn $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIXVER) \
+			$(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX); \
+	fi
 
 ifeq ($(HAVE_GMP_API),Yes)
-plugin: $(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIX)
+plugin: $(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIXVER)
-LIBRARIES += $(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIX)
+LIBRARIES += $(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIXVER)
 else
 plugin:
 	@echo "./gmp-api : No such file or directory."
 	@echo "You do not have gmp-api.  Run make gmp-bootstrap to get the gmp-api headers."
 endif
 
-$(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIX): $(MODULE_OBJS) $(ENCODER_OBJS) $(DECODER_OBJS) $(PROCESSING_OBJS) $(COMMON_OBJS)
+$(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIXVER): $(MODULE_OBJS) $(ENCODER_OBJS) $(DECODER_OBJS) $(PROCESSING_OBJS) $(COMMON_OBJS)
 	$(QUIET)rm -f $@
 	$(QUIET_CXX)$(CXX) $(SHARED) $(CXX_LINK_O) $+ $(LDFLAGS) $(SHLDFLAGS) $(MODULE_LDFLAGS)
+	if [ "$(SHAREDLIBSUFFIXVER)" != "$(SHAREDLIBSUFFIX)" ]; then \
+		ln -sfn $(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIXVER) \
+			$(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIX); \
+	fi
 
 $(PROJECT_NAME).pc: $(PROJECT_NAME).pc.in
 	@sed -e 's;@prefix@;$(PREFIX);' -e 's;@VERSION@;$(VERSION);' < $(PROJECT_NAME).pc.in > $(PROJECT_NAME).pc
@@ -220,7 +229,15 @@ install-static: $(LIBPREFIX)$(PROJECT_NAME).$(LIBSUFFIX) install-headers
 
 install-shared: $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX) install-headers $(PROJECT_NAME).pc
 	mkdir -p $(PREFIX)/lib
+	mkdir -p $(PREFIX)/bin
 	install -m 755 $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX) $(PREFIX)/lib
+	if [ -L $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX) ]; then \
+		cp -a $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX) $(SHAREDLIB_DIR); \
+	fi
+	if [ -f $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX).a ]; then \
+		install -m 644 $(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIX).a \
+			$(PREFIX)/lib; \
+	fi
 	mkdir -p $(PREFIX)/lib/pkgconfig
 	install -m 444 $(PROJECT_NAME).pc $(PREFIX)/lib/pkgconfig
 ifneq ($(EXTRA_LIBRARY),)

build/platform-android.mk

@@ -1,6 +1,10 @@
 ARCH = arm
 include $(SRC_PATH)build/arch.mk
+SHAREDLIB_DIR = $(PREFIX)/lib
 SHAREDLIBSUFFIX = so
+# Android APK/JARs expect libraries to be unversioned
+SHAREDLIBSUFFIXVER=$(SHAREDLIBSUFFIX)
+SHLDFLAGS =
 NDKLEVEL = 12
 ifeq ($(ARCH), arm)
   ifneq ($(APP_ABI), armeabi)

build/platform-darwin.mk

@@ -1,5 +1,10 @@
 include $(SRC_PATH)build/arch.mk
+SHAREDLIB_DIR = $(PREFIX)/lib
 SHAREDLIBSUFFIX = dylib
+SHAREDLIBSUFFIXVER=$(SHAREDLIBVERSION).$(SHAREDLIBSUFFIX)
+SHLDFLAGS = -dynamiclib -twolevel_namespace -undefined dynamic_lookup \
+	-fno-common -headerpad_max_install_names -install_name \
+	$(SHAREDLIB_DIR)/$(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIXVER)
 SHARED = -dynamiclib
 CFLAGS += -Wall -fPIC -MMD -MP
 LDFLAGS += -lpthread

build/platform-freebsd.mk

@@ -1,5 +1,8 @@
 include $(SRC_PATH)build/arch.mk
+SHAREDLIB_DIR = $(PREFIX)/lib
 SHAREDLIBSUFFIX = so
+SHAREDLIBSUFFIXVER=$(SHAREDLIBSUFFIX).$(SHAREDLIBVERSION)
+SHLDFLAGS = -Wl,-soname,$(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIXVER)
 CFLAGS += -fPIC
 LDFLAGS += -lpthread
 ifeq ($(ASM_ARCH), x86)

build/platform-linux.mk

@@ -1,5 +1,8 @@
 include $(SRC_PATH)build/arch.mk
+SHAREDLIB_DIR = $(PREFIX)/lib
 SHAREDLIBSUFFIX = so
+SHAREDLIBSUFFIXVER=$(SHAREDLIBSUFFIX).$(SHAREDLIBVERSION)
+SHLDFLAGS = -Wl,-soname,$(LIBPREFIX)$(PROJECT_NAME).$(SHAREDLIBSUFFIXVER)
 CFLAGS += -Wall -fno-strict-aliasing -fPIC -MMD -MP
 LDFLAGS += -lpthread
 ifeq ($(ASM_ARCH), x86)

build/platform-mingw_nt.mk

@@ -1,5 +1,8 @@
 include $(SRC_PATH)build/x86-common.mk
+SHAREDLIB_DIR = $(PREFIX)/bin
 SHAREDLIBSUFFIX = dll
+SHAREDLIBSUFFIXVER=$(SHAREDLIBSUFFIX)
+SHLDFLAGS = -Wl,--out-implib,$(LIBPREFIX)$(PROJECT_NAME).dll.a
 CFLAGS += -MMD -MP
 LDFLAGS +=
 ifeq ($(ENABLE64BIT), Yes)