49
submitted 1 day ago by KarnaSubarna@lemmy.ml to c/linux@lemmy.ml
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[-] drspod@lemmy.ml 15 points 1 day ago
[-] zagaberoo@sopuli.xyz 17 points 1 day ago

Bah, they'll never have my precious -march=native!

[-] boonhet@lemm.ee 1 points 18 hours ago

I doubt they want my fun and safe math optimizations either tbh

[-] Presi300@lemmy.world 3 points 1 day ago

Jokes on you, my system is (mostly) -O3

[-] eldavi@lemmy.ml 1 points 15 hours ago
[-] Presi300@lemmy.world 2 points 14 hours ago
[-] ryannathans@aussie.zone 0 points 1 day ago

How do they avoid the subsequent bugs O3 tends to produce?

[-] fossphi@lemm.ee 4 points 1 day ago

First time I'm hearing of this. Do you have some more details?

[-] GolfNovemberUniform@lemmy.ml -1 points 1 day ago

Not like Ubuntu works very well on old hardware but hopefully O2 support will still be there. Many people need it.

[-] ozymandias117@lemmy.world 7 points 1 day ago

-O2 vs -O3 adds -fgcse-after-reload -fipa-cp-clone -floop-interchange -floop-unroll-and-jam -fpeel-loops -fpredictive-commoning -fsplit-loops -fsplit-paths -ftree-loop-distribution -ftree-partial-pre -funswitch-loops -fvect-cost-model=dynamic -fversion-loops-for-strides

I don't think any of these optimizations require more modern hardware?

[-] themoken@startrek.website 4 points 1 day ago

Right. GCC -f optimizations are basically like "how hard are we going to try to be clever" and are, I believe, orthogonal to the actual instructions used. Machine dependent args start with -m, like -march or -mavx etc.

[-] ozymandias117@lemmy.world 1 points 1 day ago

I was reasonably certain, but left it open in case OP knew of some edge case where flags that are intended to be machine independent caused bugs on different architectures

this post was submitted on 30 Oct 2024
49 points (100.0% liked)

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Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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