Makefile: fix build for directories with spaces

When full path of a source directory has spaces in it, that makes
shell and Make split the path, so special treatment is
necessary. Additionally, @F doesn't honour the escaping, so has to be
avoided.

Reported-by: Roman Faizullin <roman@faizullin.info>
Signed-off-by: Paul Fertser <fercerpav@gmail.com>

Makefile

@@ -30,7 +30,9 @@ LIBDIR		:= $(DESTDIR)/$(PREFIX)/lib
 SHAREDIR	:= $(DESTDIR)/$(PREFIX)/share/libopencm3/scripts
 INSTALL		:= install
 
-SRCLIBDIR:= $(realpath lib)
+space:=
+space+=
+SRCLIBDIR:= $(subst $(space),\$(space),$(realpath lib))
 
 TARGETS:= stm32/f0 stm32/f1 stm32/f2 stm32/f3 stm32/f4 stm32/l1 lpc13xx lpc17xx \
 	  lpc43xx/m4 lpc43xx/m0 lm3s lm4f \
@@ -62,7 +64,7 @@ build: lib
 LIB_DIRS:=$(wildcard $(addprefix lib/,$(TARGETS)))
 $(LIB_DIRS): $(IRQ_DEFN_FILES:=.genhdr)
 	@printf "  BUILD   $@\n";
-	$(Q)$(MAKE) --directory=$@ SRCLIBDIR=$(SRCLIBDIR)
+	$(Q)$(MAKE) --directory=$@ SRCLIBDIR="$(SRCLIBDIR)"
 
 lib: $(LIB_DIRS)
 	$(Q)true
@@ -92,7 +94,7 @@ clean: $(IRQ_DEFN_FILES:=.cleanhdr) $(LIB_DIRS:=.clean) $(EXAMPLE_DIRS:=.clean)
 %.clean:
 	$(Q)if [ -d $* ]; then \
 		printf "  CLEAN   $*\n"; \
-		$(MAKE) -C $* clean SRCLIBDIR=$(SRCLIBDIR) || exit $?; \
+		$(MAKE) -C $* clean SRCLIBDIR="$(SRCLIBDIR)" || exit $?; \
 	fi;
 
 

lib/Makefile.include

@@ -29,12 +29,12 @@ OBJS += vector.o systick.o scb.o nvic.o assert.o sync.o dwt.o
 all: $(SRCLIBDIR)/$(LIBNAME).a
 
 $(SRCLIBDIR)/$(LIBNAME).a: $(SRCLIBDIR)/$(LIBNAME).ld $(OBJS)
-	@printf "  AR      $(@F)\n"
-	$(Q)$(AR) $(ARFLAGS) $@ $(OBJS)
+	@printf "  AR      $(LIBNAME).a\n"
+	$(Q)$(AR) $(ARFLAGS) "$@" $(OBJS)
 
 $(SRCLIBDIR)/$(LIBNAME).ld: $(LIBNAME).ld
-	@printf "  CP      $(@F)\n"
-	$(Q)cp $^ $@
+	@printf "  CP      $(LIBNAME).ld\n"
+	$(Q)cp $^ "$@"
 	$(Q)if [ -f $(LIBNAME)_rom_to_ram.ld ]; then cp $(LIBNAME)_rom_to_ram.ld $(SRCLIBDIR); fi
 
 %.o: %.c