Build: make quiet compilation optional

Switch from always hiding the executed command to hide it only by
default, but let the user request that the commands be shown.  For now,
follow the convention that setting $V requests a verbose compilation.

Makefile

@@ -27,9 +27,16 @@ RM      ?= rm -f
 SUFFIXES = .o .c .h .a .so .sl
 
 COMPILE.c	?= $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
+
+ifndef V
+QUIET_AR	= @echo "AR	$@";
+QUIET_CC	= @echo "CC	$@";
+QUIET_LINK	= @echo "LINK	$@";
+QUIET_RANLIB	= @echo "RANLIB	$@";
+endif
+
 .c.o:
-	@(echo "compiling $< ...")
-	@($(COMPILE.c) -o $@ $<)
+	$(QUIET_CC)$(COMPILE.c) $(OUTPUT_OPTION) $<
 
 
 SRCS = src/iniparser.c \
@@ -41,11 +48,11 @@ OBJS = $(SRCS:.c=.o)
 default:	libiniparser.a libiniparser.so
 
 libiniparser.a:	$(OBJS)
-	@($(AR) $(ARFLAGS) libiniparser.a $(OBJS))
-	@($(RANLIB) libiniparser.a)
+	$(QUIET_AR)$(AR) $(ARFLAGS) $@ $<
+	$(QUIET_RANLIB)$(RANLIB) $@
 
 libiniparser.so:	$(OBJS)
-	@$(SHLD) $(LDSHFLAGS) -o $@.0 $(OBJS) $(LDFLAGS) \
+	$(QUIET_LINK)$(SHLD) $(LDSHFLAGS) -o $@.0 $(OBJS) $(LDFLAGS) \
 		-Wl,-soname=`basename $@`.0
 
 clean: