Implemented support for working with remote repositories.

libfetch from NetBSD's pkgsrc has been imported into lib/fetch, but
the objects are embedded into libxbps. Only a public function to fetch
files has been implemented: xbps_fetch_file().

The library now is built with -fvisibility=hidden by default, and
exported symbols are the ones that use the SYMEXPORT macro.

The code works well enough, but will need many more cleanups.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20091027004600-0lq9aao67lisbzxv

lib/Makefile

@@ -1,49 +1,65 @@
 include ../vars.mk
 
-# The shared library.
-MAJOR		= 0
-MINOR		= 0
-MICRO		= 0
-LIBXBPS_SO	= $(LIBXBPS).$(MAJOR).$(MINOR).$(MICRO)
-LIBXBPS		= libxbps.so
-LIBXBPS_STATIC 	= libxbps.a
-LIBXBPS_LDFLAGS	= -larchive -lprop -shared -Wl,-soname,$(LIBXBPS).$(MAJOR)
+INET6	?= yes
+SSL	?= yes
+LIBS	= -larchive -lprop
 
-OBJECTS	=	configure.o cmpver.o depends.o fexec.o findpkg.o
-OBJECTS	+=	humanize_number.o orphans.o plist.o purge.o register.o remove.o
-OBJECTS	+=	repository.o requiredby.o sha256.o sortdeps.o state.o unpack.o
-OBJECTS	+=	util.o
+ifdef SSL
+CPPFLAGS += -DWITH_SSL
+LIBS += -lssl -lcrypto
+endif
 
-all: $(LIBXBPS) $(LIBXBPS_STATIC)
+ifdef INET6
+CPPFLAGS += -DINET6
+endif
+
+ifdef DEBUG
+CPPFLAGS += -DDEBUG
+endif
+
+LIBMAJOR	= 0
+LIBMINOR	= 0
+LIBMICRO	= 0
+LIBXBPS_SHLIB	= libxbps.so.$(LIBMAJOR).$(LIBMINOR).$(LIBMICRO)
+LIBXBPS_LDFLAGS	= $(LIBS) -shared -Wl,-soname,libxbps.so.$(LIBMAJOR)
+
+# libfetch
+OBJS = fetch/common.o fetch/fetch.o fetch/file.o fetch/ftp.o fetch/http.o
+
+# libxbps
+OBJS +=	configure.o cmpver.o depends.o download.o fexec.o findpkg.o
+OBJS +=	humanize_number.o orphans.o plist.o purge.o register.o remove.o
+OBJS +=	repository.o requiredby.o sha256.o sortdeps.o state.o unpack.o
+OBJS +=	util.o
+
+all: libfetch libxbps.so libxbps.a
 .PHONY: all
 
-$(LIBXBPS): $(OBJECTS)
-	$(CC) $(LIBXBPS_LDFLAGS) $^ -o $(LIBXBPS_SO)
-	-ln -sf $(LIBXBPS_SO) $(LIBXBPS).$(MAJOR)
-	-ln -sf $(LIBXBPS_SO) $(LIBXBPS)
+libfetch:
+	$(MAKE) -C fetch
 
-$(LIBXBPS_STATIC): $(OBJECTS)
+libxbps.so: $(OBJS)
+	$(CC) $(LIBXBPS_LDFLAGS) $^ -o $(LIBXBPS_SHLIB)
+	-ln -sf $(LIBXBPS_SHLIB) libxbps.so.$(LIBMAJOR)
+	-ln -sf $(LIBXBPS_SHLIB) libxbps.so
+
+libxbps.a: $(OBJS)
 	$(AR) rcs $@ $^
 	ranlib $@
 
 .PHONY: install
-install: $(LIBXBPS) $(LIBXBPS_STATIC)
+install: all
 	install -d $(LIBDIR)
-	install -m 644 $(LIBXBPS_STATIC) $(LIBDIR)
-	install -m 644 $(LIBXBPS_SO) $(LIBDIR)
-	cp -a $(LIBXBPS) $(LIBDIR)
-	cp -a $(LIBXBPS).$(MAJOR) $(LIBDIR)
+	install -m 644 libxbps.a $(LIBDIR)
+	install -m 644 $(LIBXBPS_SHLIB) $(LIBDIR)
+	cp -a libxbps.so $(LIBDIR)
+	cp -a libxbps.so.$(LIBMAJOR) $(LIBDIR)
 
 .PHONY: uninstall
 uninstall:
 	-rm -f $(LIBDIR)/libxbps.*
 
 .PHONY: clean
-clean: clean-lib clean-objs
-
-clean-lib:
-	-rm -f $(LIBXBPS)*
-	-rm -f $(LIBXBPS_STATIC)
-
-clean-objs:
-	-rm -f *.o
+clean:
+	-rm -f libxbps* $(OBJS)
+	$(MAKE) -C fetch clean