Commit 14516765 authored by Luc Van Oostenryck's avatar Luc Van Oostenryck Committed by Masahiro Yamada
Browse files

kbuild: add endianness flag to CHEKCFLAGS 



The kernel depends on macros like __BYTE_ORDER__,
__BIG_ENDIAN__ or __LITTLE_ENDIAN__.

OTOH, sparse doesn't know about the endianness of the kernel and
by default uses the same as the machine on which sparse was built.

Ensure that sparse can predefine the macros corresponding to
how the kernel was configured by adding -m{big,little}-endian
to CHECKFLAGS in the main Makefile (and so for all archs).
Also, remove the equivalent done in arch specific Makefiles.

Signed-off-by: default avatarLuc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
parent 59f7b584

Makefile

+3 −0
Original line number Diff line number Diff line
@@ -874,6 +874,9 @@ ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 
LDFLAGS_vmlinux	+= $(call ld-option, -X,)

endif



# insure the checker run with the right endianness

CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)



# Default kernel image to build when no specific target is given.

# KBUILD_IMAGE may be overruled on the command line or

# set in the environment

arch/openrisc/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ LDFLAGS_vmlinux := 
LIBGCC 		:= $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)



KBUILD_CFLAGS	+= -pipe -ffixed-r10 -D__linux__

CHECKFLAGS	+= -mbig-endian



ifeq ($(CONFIG_OPENRISC_HAVE_INST_MUL),y)

	KBUILD_CFLAGS += $(call cc-option,-mhard-mul)

arch/parisc/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -22,7 +22,7 @@ KBUILD_IMAGE := vmlinuz 
KBUILD_DEFCONFIG := default_defconfig



NM		= sh $(srctree)/arch/parisc/nm

CHECKFLAGS	+= -D__hppa__=1 -mbig-endian

CHECKFLAGS	+= -D__hppa__=1

LIBGCC		= $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)

export LIBGCC

arch/s390/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -18,7 +18,7 @@ KBUILD_CFLAGS += -m64 
KBUILD_AFLAGS	+= -m64

UTS_MACHINE	:= s390x

STACK_SIZE	:= 16384

CHECKFLAGS	+= -D__s390__ -D__s390x__ -mbig-endian

CHECKFLAGS	+= -D__s390__ -D__s390x__



export LD_BFD

CRA Git | Maintained and supported by SUSTech CRA and CCSE