config/optimize: add march=native to host cflags #3068
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Relies on the assumption that the machine that will build the toolchain will also be the machine to use said toolchain. Signed-off-by: Ian Leonard <antonlacon@gmail.com>
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jenkins was happy at all archs |
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I did more testing with and without #3068 With PR3068: Without PR3068: So the "With PR3068" Generic builds tended to be a little faster than "without", while RPi/RPi2 builds were about the same as "without" (maybe even a little slower). Not really conclusive, and certainly not an issue. Test build server: Intel Haswell 4GHz with 8 cores. |
MilhouseVH
approved these changes
Nov 4, 2018
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This makes the assumption that the machine that will build the host tools will also be the machine to use them, and therefore march=native will produce valid instructions. Decreases time to build an image for me by slightly over 5 minutes (-3.4%)