build: add headers path to CFLAGS once for all archs

This just remove duplication.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <jgrall@amazon.com>

xen/Makefile

@@ -312,6 +312,9 @@ CFLAGS += -flto
 LDFLAGS-$(CONFIG_CC_IS_CLANG) += -plugin LLVMgold.so
 endif
 
+CFLAGS += -I$(srctree)/include
+CFLAGS += -I$(srctree)/arch/$(TARGET_ARCH)/include
+
 # Note that link order matters!
 ALL_OBJS-y                := common/built_in.o
 ALL_OBJS-y                += drivers/built_in.o

xen/arch/arm/arch.mk

@@ -1,9 +1,6 @@
 ########################################
 # arm-specific definitions
 
-CFLAGS += -I$(srctree)/include
-CFLAGS += -I$(srctree)/arch/$(TARGET_ARCH)/include
-
 $(call cc-options-add,CFLAGS,CC,$(EMBEDDED_EXTRA_CFLAGS))
 $(call cc-option-add,CFLAGS,CC,-Wnested-externs)
 

xen/arch/riscv/arch.mk

@@ -11,5 +11,3 @@ riscv-march-$(CONFIG_RISCV_ISA_C)       := $(riscv-march-y)c
 # -mcmodel=medlow would force Xen into the lower half.
 
 CFLAGS += -march=$(riscv-march-y) -mstrict-align -mcmodel=medany
-CFLAGS += -I$(srctree)/include
-CFLAGS += -I$(srctree)/arch/$(TARGET_ARCH)/include

xen/arch/x86/arch.mk

@@ -3,8 +3,6 @@
 
 export XEN_IMG_OFFSET := 0x200000
 
-CFLAGS += -I$(srctree)/include
-CFLAGS += -I$(srctree)/arch/$(TARGET_ARCH)/include
 CFLAGS += -I$(srctree)/arch/x86/include/asm/mach-generic
 CFLAGS += -I$(srctree)/arch/x86/include/asm/mach-default
 CFLAGS += -DXEN_IMG_OFFSET=$(XEN_IMG_OFFSET)