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> On 13 Mar 2017, at 16:27, tuxic@××××××.de wrote: |
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> On 03/13 08:06, Martin Vaeth wrote: |
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>> You appear to have experimental CFLAGS. Try without these. |
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>> |
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> Could you specify, what parts of that settings are experimental, |
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> so that I will remove the correct ones? |
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Your flags are: |
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CFLAGS=-march=native -O2 -pipe -ffast-math -fopenmp -fprefetch-loop-arrays -ftree-parallelize-loops=12 -funroll-all-loops -fwhole-program -mtune=amdfam10 |
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Google each one of them, see what they do. There's probably a gcc manual that explains them. |
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"funroll-loops" has long been a joke about Gentoo ricing. https://fun.irq.dk/funroll-loops.org/ |
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I would guess you'd take that out and -ftree-parallelize-loops for a start. |
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If you want to use the program, compile it with just `CFLAGS=-march=native -O2 -pipe` - I'm sure that will work. Then you can go back and see what options you can add without crashing the compile. These options often do not actually make things faster. |
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Stroller. |
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