Remove libtool depencency, reorganise Makefile

We don't need libtool anymore, just build the library directly.
This lets us simplify the Makefile too.

Makefile

@@ -6,44 +6,38 @@ include config.mk
 
 SRC = surf.c common.c
 OBJ = $(SRC:.c=.o)
-LIBSRC = libsurf-webext.c common.c
-LIBOBJ = $(LIBSRC:.c=.lo)
+WEBEXTSRC = libsurf-webext.c
+WEBEXTOBJ = $(WEBEXTSRC:.c=.o)
 
-all: options libsurf-webext.la surf
+all: options libsurf-webext.so surf
 
 options:
 	@echo surf build options:
-	@echo "CFLAGS     = $(SURFCFLAGS)"
-	@echo "LDFLAGS    = $(SURFLDFLAGS)"
-	@echo "CC         = $(CC)"
-	@echo "LIBCFLAGS  = $(LIBCFLAGS)"
-	@echo "LIBLDFLAGS = $(LIBLDFLAGS)"
-	@echo "LIBTOOL    = $(LIBTOOL)"
+	@echo "CC            = $(CC)"
+	@echo "CFLAGS        = $(SURFCFLAGS) $(CFLAGS)"
+	@echo "WEBEXTCFLAGS  = $(WEBEXTCFLAGS) $(CFLAGS)"
+	@echo "LDFLAGS       = $(LDFLAGS)"
 
 .c.o:
-	$(CC) $(SURFCFLAGS) -c $<
-
-.c.lo:
-	$(LIBTOOL) --mode compile --tag CC $(CC) $(LIBCFLAGS) -c $<
-
-$(OBJ): config.h config.mk
-$(LIBOBJ): config.h config.mk
+	$(CC) $(SURFCFLAGS) $(CFLAGS) -c $<
 
 config.h:
 	cp config.def.h $@
 
-libsurf-webext.la: $(LIBOBJ)
-	$(LIBTOOL) --mode link --tag CC $(CC) $(LIBLDFLAGS) -o $@ \
-	    $(LIBOBJ) $(LIB) -rpath $(DESTDIR)$(LIBPREFIX)
+$(OBJ): config.h config.mk
+
+$(WEBEXTOBJ): config.h config.mk
+	$(CC) $(WEBEXTCFLAGS) $(CFLAGS) -c $(WEBEXTSRC)
+
+libsurf-webext.so: $(WEBEXTOBJ)
+	$(CC) -shared -Wl,-soname,$@ $(LDFLAGS) -o $@ $< $(WEBEXTLIBS) -lc
 
 surf: $(OBJ)
-	$(CC) $(SURFCFLAGS) -o $@ $(OBJ) $(SURFLDFLAGS)
+	$(CC) $(SURFLDLAGS) $(LDFLAGS) -o $@ $(OBJ) $(LIBS)
 
-clean-lib:
-	rm -rf libsurf-webext.la .libs $(LIBOBJ) $(LIBOBJ:.lo=.o)
-
-clean: clean-lib
+clean:
 	rm -f surf $(OBJ)
+	rm -f libsurf-webext.so $(WEBEXTOBJ)
 
 distclean: clean
 	rm -f config.h surf-$(VERSION).tar.gz
@@ -52,32 +46,27 @@ dist: distclean
 	mkdir -p surf-$(VERSION)
 	cp -R LICENSE Makefile config.mk config.def.h README \
 	    surf-open.sh arg.h TODO.md surf.png \
-	    surf.1 $(SRC) $(LIBSRC) surf-$(VERSION)
+	    surf.1 $(SRC) $(WEBEXTSRC) surf-$(VERSION)
 	tar -cf surf-$(VERSION).tar surf-$(VERSION)
 	gzip surf-$(VERSION).tar
 	rm -rf surf-$(VERSION)
 
-install-lib: libsurf-webext.la
-	mkdir -p $(DESTDIR)$(LIBPREFIX)
-	$(LIBTOOL) --mode install install -c libsurf-webext.la \
-	    $(DESTDIR)$(LIBPREFIX)/libsurf-webext.la
-
-install: all install-lib
+install: all
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
 	cp -f surf $(DESTDIR)$(PREFIX)/bin
 	chmod 755 $(DESTDIR)$(PREFIX)/bin/surf
+	mkdir -p $(DESTDIR)$(WEBEXTDIR)
+	cp -f libsurf-webext.so $(DESTDIR)$(WEBEXTDIR)
+	chmod 644 $(DESTDIR)$(PREFIX)/bin/surf
 	mkdir -p $(DESTDIR)$(MANPREFIX)/man1
 	sed "s/VERSION/$(VERSION)/g" < surf.1 > $(DESTDIR)$(MANPREFIX)/man1/surf.1
 	chmod 644 $(DESTDIR)$(MANPREFIX)/man1/surf.1
 
-uninstall-lib:
-	$(LIBTOOL) --mode uninstall rm -f \
-	    $(DESTDIR)$(LIBPREFIX)/libsurf-webext.la
-	- rm -df $(DESTDIR)$(LIBPREFIX)
-
-uninstall: uninstall-lib
+uninstall:
 	rm -f $(DESTDIR)$(PREFIX)/bin/surf
 	rm -f $(DESTDIR)$(MANPREFIX)/man1/surf.1
+	rm -f $(DESTDIR)$(WEBEXTDIR)/libsurf-webext.so
+	- rmdir $(DESTDIR)$(WEBEXTDIR)
 
-.SUFFIXES: .la .lo .o .c
-.PHONY: all options clean-dist clean dist install-lib install uninstall-lib uninstall
+.SUFFIXES: .so .o .c
+.PHONY: all options clean-dist clean dist install uninstall