Build: show directory during compilation, remove default rules

When using -j, it can be confusing to see files being compiled out
of order, so prefix compilation with the directory it's building
for.

Makefile.common

@@ -84,24 +84,26 @@ endif
 
 -include $(SUFFIXED_OBJS:%.o=%.d)
 
+.SUFFIXES:
+
 %$(OBJ_SUFFIX).o: %.cpp $(EXTRA_SOURCES)
- @echo "C++ $@"
+ @echo "$(notdir $(CURDIR)): C++ $@"
  $(QUIET) $(CXX) $(CXXFLAGS) -o $@ -c $<
 
 %$(OBJ_SUFFIX).o: %.c
- @echo "C $@"
+ @echo "$(notdir $(CURDIR)): C $@"
  $(QUIET) $(CC) $(CFLAGS) -o $@ -c $<
 
 %.ao: %.S
- @echo "AS $@"
+ @echo "$(notdir $(CURDIR)): AS $@"
  $(QUIET) $(AS) -o $@ $<
 
 $(PROGRAM): $(STATIC_LIB_DEPS) $(SUFFIXED_OBJS) $(EXTRA_OBJS)
- @echo "LINK $(PROGRAM)"
+ @echo "$(notdir $(CURDIR)): LINK $(PROGRAM)"
  $(QUIET) $(CXX) -o $(PROGRAM) $(EXTRA_OBJS) $(SUFFIXED_OBJS) $(LDFLAGS)
 
 $(LIBRARY): $(SUFFIXED_OBJS) $(EXTRA_OBJS)
- @echo "LIB $@"
+ @echo "$(notdir $(CURDIR)): LIB $@"
  $(QUIET) $(AR) rcs $@ $(OBJS) $(EXTRA_OBJS) $(LIBS)
  $(POST_LIBRARY_BUILD)
 
@@ -126,7 +128,7 @@ all: $(PROGRAM) $(LIBRARY)
 EXTRA_CLEAN ?=
 
 clean:
- @echo "CLEAN"
+ @echo "$(notdir $(CURDIR)): CLEAN"
  $(QUIET) rm -f $(PROGRAM) $(LIBRARY) $(SUFFIXED_OBJS) $(EXTRA_OBJS) *.d $(EXTRA_CLEAN)
 
 install: