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powerpc/mpc85xx: Improve disabling of SPE instructions

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Specifying -mspe=no also disables usage of SPE instructions. It is
documented in "[PATCH,rs6000] make -mno-spe work as expected" email:
http://gcc.gnu.org/ml/gcc-patches/2008-04/msg00311.html

So replace -mspe=yes by -mspe=no, so make it clear that u-boot has to be
compiled without SPE instructions.

Linux kernel contains following Makefile code to achieve it:

    # No SPE instruction when building kernel
    # (We use all available options to help semi-broken compilers)
    KBUILD_CFLAGS += $(call cc-option,-mno-spe)
    KBUILD_CFLAGS += $(call cc-option,-mspe=no)

Do same for U-Boot.

Signed-off-by: Pali Rohár <pali@kernel.org>
This commit is contained in:
Pali Rohár 2022-12-11 15:14:59 +01:00 committed by Tom Rini
parent c0d0569cf6
commit 138b6061a1
1 changed files with 4 additions and 3 deletions
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7
arch/powerpc/cpu/mpc85xx/config.mk
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@ -6,11 +6,12 @@
PLATFORM_CPPFLAGS += -msoft-float -mno-string
PLATFORM_RELFLAGS += -msingle-pic-base -fno-jump-tables
# -mspe=yes is needed to have -mno-spe accepted by a buggy GCC;
# No SPE instruction when building u-boot
# (We use all available options to help semi-broken compilers)
# see "[PATCH,rs6000] make -mno-spe work as expected" on
# http://gcc.gnu.org/ml/gcc-patches/2008-04/msg00311.html
PLATFORM_CPPFLAGS += $(call cc-option,-mspe=yes) \
$(call cc-option,-mno-spe)
PLATFORM_CPPFLAGS += $(call cc-option,-mno-spe) \
$(call cc-option,-mspe=no)
ifdef CONFIG_E6500
PLATFORM_CPPFLAGS += -mcpu=e6500