kbuild: Move flags to Makefile.lib

a_flags defined in Makefile.lib, and a set of flags made for host
related rules. This avoided some duplication in Makefile.build

scripts/Makefile.build

@@ -103,7 +103,9 @@ cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 	$(call if_changed_dep,cc_o_c)
 
 quiet_cmd_cc_lst_c = MKLST   $@
-cmd_cc_lst_c       = $(CC) $(c_flags) -g -c -o $*.o $< && sh scripts/makelst $*.o System.map $(OBJDUMP) > $@
+      cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
+		     $(CONFIG_SHELL) $(src)/scripts/makelst $*.o \
+				     System.map $(OBJDUMP) > $@
 
 %.lst: %.c FORCE
 	$(call if_changed_dep,cc_lst_c)
@@ -116,9 +118,6 @@ modkern_aflags := $(AFLAGS_KERNEL)
 $(real-objs-m)      : modkern_aflags := $(AFLAGS_MODULE)
 $(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE)
 
-a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(NOSTDINC_FLAGS) \
-	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
-
 quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
 cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $< 
 
@@ -217,9 +216,7 @@ targets += $(multi-used-y) $(multi-used-m)
 # Create executable from a single .c file
 # host-csingle -> Executable
 quiet_cmd_host-csingle 	= HOSTCC  $@
-      cmd_host-csingle	= $(HOSTCC) -Wp,-MD,$(depfile) \
-			  $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
-			  $(HOST_LOADLIBES) -o $@ $<
+      cmd_host-csingle	= $(HOSTCC) $(hostc_flags) $(HOST_LOADLIBES) -o $@ $<
 $(host-csingle): %: %.c FORCE
 	$(call if_changed_dep,host-csingle)
 
@@ -235,9 +232,7 @@ $(host-cmulti): %: $(host-cobjs) $(host-cshlib) FORCE
 # Create .o file from a single .c file
 # host-cobjs -> .o
 quiet_cmd_host-cobjs	= HOSTCC  $@
-      cmd_host-cobjs	= $(HOSTCC) -Wp,-MD,$(depfile) \
-			  $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
-			  $(HOSTCFLAGS_$(@F)) -c -o $@ $<
+      cmd_host-cobjs	= $(HOSTCC) $(hostc_flags) -c -o $@ $<
 $(host-cobjs): %.o: %.c FORCE
 	$(call if_changed_dep,host-cobjs)
 
@@ -253,18 +248,14 @@ $(host-cxxmulti): %: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE
 
 # Create .o file from a single .cc (C++) file
 quiet_cmd_host-cxxobjs	= HOSTCXX $@
-      cmd_host-cxxobjs	= $(HOSTCXX) -Wp,-MD,$(depfile) \
-			  $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
-			  $(HOSTCXXFLAGS_$(@F)) -c -o $@ $<
+      cmd_host-cxxobjs	= $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
 $(host-cxxobjs): %.o: %.cc FORCE
 	$(call if_changed_dep,host-cxxobjs)
 
 # Compile .c file, create position independent .o file
 # host-cshobjs -> .o
 quiet_cmd_host-cshobjs	= HOSTCC  -fPIC $@
-      cmd_host-cshobjs	= $(HOSTCC) -Wp,-MD,$(depfile) -fPIC\
-			  $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
-			  $(HOSTCFLAGS_$(@F)) -c -o $@ $<
+      cmd_host-cshobjs	= $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
 $(host-cshobjs): %.o: %.c FORCE
 	$(call if_changed_dep,host-cshobjs)
 

scripts/Makefile.lib

@@ -128,6 +128,12 @@ modname_flags  = -DKBUILD_MODNAME=$(subst $(comma),_,$(subst -,_,$(modname)))
 c_flags        = -Wp,-MD,$(depfile) $(CFLAGS) $(NOSTDINC_FLAGS) \
 	         $(modkern_cflags) $(EXTRA_CFLAGS) $(CFLAGS_$(*F).o) \
 	         $(basename_flags) $(modname_flags) $(export_flags) 
+a_flags        = -Wp,-MD,$(depfile) $(AFLAGS) $(NOSTDINC_FLAGS)\
+		 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
+hostc_flags    = -Wp,-MD,$(depfile) $(HOSTCFLAGS) $(HOST_EXTRACFLAGS)\
+		 $(HOSTCFLAGS_$(*F).o)
+hostcxx_flags  = -Wp,-MD,$(depfile) $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS)\
+		 $(HOSTCXXFLAGS_$(*F).o)
 
 # Finds the multi-part object the current object will be linked into
 modname-multi = $(subst $(space),_,$(strip $(foreach m,$(multi-used),\
@@ -139,7 +145,7 @@ modname-multi = $(subst $(space),_,$(strip $(foreach m,$(multi-used),\
 quiet_cmd_shipped = SHIPPED $@
 cmd_shipped = cat $< > $@
 
-%:: %_shipped
+$(obj)/%:: $(src)/%_shipped
 	$(call cmd,shipped)
 
 # Commands useful for building a boot image