OpenWrt Forum Archive

Topic: Compile for 74kc instead of 34kc ?

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Post #1
Snoop05
10 Aug 2016, 15:07

march and mtune are set by default to 34kc on ar71xx platform even if particular device has mip 74kc cpu. Can i safely replace all "34kc" with "74kc" in config and compile?

CONFIG_TARGET_ARCH_PACKAGES="mips_74kc"
CONFIG_DEFAULT_TARGET_OPTIMIZATION="-Os -pipe -mno-branch-likely -march=74kc -mtune=74kc"
CONFIG_CPU_TYPE="74kc"
CONFIG_TARGET_OPTIMIZATION="-Os -pipe -mno-branch-likely -march=74kc -mtune=74kc"

(Last edited by Snoop05 on 10 Aug 2016, 15:10)

Post #2
hnyman
10 Aug 2016, 17:48

Yes. 34kc has just been selected as a balanced compromise.

If you compile just for one device, you can naturally use the exactly correct tuning, like 74kc.

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