openwrt/package/network/services/dnsmasq/patches/200-let-makefile-be-aware-of-config-changes.patch

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Index: dnsmasq-2.72/Makefile
===================================================================
--- dnsmasq-2.72.orig/Makefile 2014-12-30 19:46:10.484921940 +0800
+++ dnsmasq-2.72/Makefile 2014-12-30 19:56:39.712926794 +0800
@@ -74,6 +74,10 @@
hdrs = dnsmasq.h config.h dhcp-protocol.h dhcp6-protocol.h \
dns-protocol.h radv-protocol.h ip6addr.h
+COPT_CONF = $(top)/.copt_$(shell $(CC) -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/config.h | \
+ ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' ')
+COPT_CONF_WILD = $(top)/.copt_*
+
all : $(BUILDDIR)
@cd $(BUILDDIR) && $(MAKE) \
top="$(top)" \
@@ -83,7 +87,7 @@
mostly_clean :
rm -f $(BUILDDIR)/*.mo $(BUILDDIR)/*.pot
- rm -f $(BUILDDIR)/.configured $(BUILDDIR)/*.o $(BUILDDIR)/dnsmasq.a $(BUILDDIR)/dnsmasq
+ rm -f $(BUILDDIR)/$(COPT_CONF_WILD) $(BUILDDIR)/*.o $(BUILDDIR)/dnsmasq.a $(BUILDDIR)/dnsmasq
clean : mostly_clean
rm -f $(BUILDDIR)/dnsmasq_baseline
@@ -139,7 +143,7 @@
# rules below are targets in recusive makes with cwd=$(BUILDDIR)
-.configured: $(hdrs)
+$(COPT_CONF): $(hdrs)
@rm -f *.o
@touch $@
@@ -149,7 +153,7 @@
.c.o:
$(CC) $(CFLAGS) $(COPTS) $(i18n) $(build_cflags) $(RPM_OPT_FLAGS) -c $<
-dnsmasq : .configured $(hdrs) $(objs)
+dnsmasq : $(COPT_CONF) $(hdrs) $(objs)
$(CC) $(LDFLAGS) -o $@ $(objs) $(build_libs) $(LIBS)
dnsmasq.pot : $(objs:.o=.c) $(hdrs)