x86/build: Clean up boot/Makefile

There are no .S intermediate files, so rework in terms of head-bin-objs.

No functional change.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>

diff --git a/xen/arch/x86/boot/Makefile b/xen/arch/x86/boot/Makefile
index 672df50810605ae3bf554b2f50e3d8a5412287ba..d6bc8fc084ae68cbc4880b570d00da8ba6c3e370 100644 (file)
--- a/xen/arch/x86/boot/Makefile
+++ b/xen/arch/x86/boot/Makefile
@@ -1,14 +1,15 @@
 obj-bin-y += head.o
-head-srcs := cmdline.S reloc.S
 
-nocov-y += $(head-srcs:.S=.o)
-noubsan-y += $(head-srcs:.S=.o)
-targets += $(head-srcs:.S=.o)
+head-bin-objs := cmdline.o reloc.o
 
-head-srcs := $(addprefix $(obj)/, $(head-srcs))
+nocov-y   += $(head-bin-objs)
+noubsan-y += $(head-bin-objs)
+targets   += $(head-bin-objs)
+
+head-bin-objs := $(addprefix $(obj)/,$(head-bin-objs))
 
 $(obj)/head.o: AFLAGS-y += -Wa$(comma)-I$(obj)
-$(obj)/head.o: $(head-srcs:.S=.bin)
+$(obj)/head.o: $(head-bin-objs:.o=.bin)
 
 CFLAGS_x86_32 := $(subst -m64,-m32 -march=i686,$(XEN_TREEWIDE_CFLAGS))
 $(call cc-options-add,CFLAGS_x86_32,CC,$(EMBEDDED_EXTRA_CFLAGS))
@@ -19,8 +20,8 @@ endif
 CFLAGS_x86_32 += -I$(srctree)/include
 
 # override for 32bit binaries
-$(head-srcs:.S=.o): CFLAGS_stack_boundary :=
-$(head-srcs:.S=.o): XEN_CFLAGS := $(CFLAGS_x86_32) -fpic
+$(head-bin-objs): CFLAGS_stack_boundary :=
+$(head-bin-objs): XEN_CFLAGS := $(CFLAGS_x86_32) -fpic
 
 LDFLAGS_DIRECT-$(call ld-option,--warn-rwx-segments) := --no-warn-rwx-segments
 LDFLAGS_DIRECT += $(LDFLAGS_DIRECT-y)