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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-05-30 22:19:21 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-06-01 23:08:09 +1000 |
| commit | 1421dc6d48296a9e91702743b31458d337610aa6 (patch) | |
| tree | 3341d1a4b9765ca7f523a52498b0563d14e758b0 /arch/powerpc/Makefile | |
| parent | af3901cbbd3de182aafb8ee553c825c0074df6a2 (diff) | |
| download | lwn-1421dc6d48296a9e91702743b31458d337610aa6.tar.gz lwn-1421dc6d48296a9e91702743b31458d337610aa6.zip | |
powerpc/kbuild: Use flags variables rather than overriding LD/CC/AS
The powerpc toolchain can compile combinations of 32/64 bit and
big/little endian, so it's convenient to consider, e.g.,
`CC -m64 -mbig-endian`
To be the C compiler for the purpose of invoking it to build target
artifacts. So overriding the CC variable to include these flags works
for this purpose.
Unfortunately that is not compatible with the way the proposed new
Kconfig macro language will work.
After previous patches in this series, these flags can be carefully
passed in using flags instead.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/Makefile')
| -rw-r--r-- | arch/powerpc/Makefile | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 167b26a0780c..6faf1d6ad9dd 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -75,13 +75,15 @@ endif endif ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) -override LD += -EL +KBUILD_CFLAGS += -mlittle-endian +LDFLAGS += -EL LDEMULATION := lppc GNUTARGET := powerpcle MULTIPLEWORD := -mno-multiple KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) else -override LD += -EB +KBUILD_CFLAGS += $(call cc-option,-mbig-endian) +LDFLAGS += -EB LDEMULATION := ppc GNUTARGET := powerpc MULTIPLEWORD := -mmultiple @@ -94,19 +96,19 @@ aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 endif -cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian -cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) ifneq ($(cc-name),clang) cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align endif +cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) +cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian ifeq ($(HAS_BIARCH),y) -override AS += -a$(BITS) -override LD += -m elf$(BITS)$(LDEMULATION) -override CC += -m$(BITS) +KBUILD_CFLAGS += -m$(BITS) +KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) +LDFLAGS += -m elf$(BITS)$(LDEMULATION) KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) endif |