[U-Boot] [PATCH v2 3/5] MIPS: Optimize the setup of endianess and CPU optimization flags
Shinya Kuribayashi
skuribay at pobox.com
Mon Mar 28 16:56:40 CEST 2011
Sorry for being late,
On 03/24/2011 01:37 AM, Daniel Schwierzeck wrote:
> 2011/3/23 Shinya Kuribayashi <skuribay at pobox.com>:
> Following changes have been introduced to ld in binutils-2.16:
[...]
> I'd claim that all toolchains with binutils lesser than 2.16 are not
> working anymore.
[...]
>>> I suggest to drop official support for ELDK-3.1.1 / binutils-2.14 and
>>> earlier.
Excellent, no comments from me. Let's forget about all pre-binutils
2.16 releases from now on, and ELDK-3.1.1 as well.
> I have prepared a v3 of this patch that checks whether -mips32r2 is
> supported. If not than -mips32 will be used as fallback. But I want
> to clarify this first before I send it.
I'm guessting you're worried that the corresponding line will differ
from what the Linux/MIPS has, but that's not a problem. The Linux/MIPS
tries to tighten the condition in accordance with explicit configuration
options such as CONFIG_CPU_MIPS32_R1/R2, CONFIG_CPU_MIPS64_R1/R2.
> cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
> -Wa,-mips32 -Wa,--trap
> cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
> -Wa,-mips32r2 -Wa,--trap
> cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
> -Wa,-mips64 -Wa,--trap
> cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
> -Wa,-mips64r2 -Wa,--trap
We U-Boot doesn't have to follow this convention, and can relax the cc-
option rules.
I'll wait for v3 patch(es), and push them during the next merge window.
Thanks in advance,
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