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Old 2 Weeks Ago
mafkees1233 mafkees1233 is offline
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Default Building from source

Are there any benefits from compiling the kernel, userland and xenocara from source over using the provided binaries?
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Short answer: No. And the project discourages building from source.


The long answer: Depends on what you want. Building -stable fixes? Customizing something? Doing kernel or application development? In any case, you need to know what you're doing.
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Quote:
Originally Posted by mafkees1233 View Post
Are there any benefits from compiling the kernel, userland and xenocara from source over using the provided binaries?
Yes, should you like to become an expert.
Quote:
Originally Posted by https://www.openbsd.org/faq/current.html
compiling your own source code is discouraged for everyone except for experts
If your goal is to add new features or fix bugs, compiling the source code is a requirement. And thus you will become an expert.
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mafkees1233 mafkees1233 is offline
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Compiled everything from source yesterday and it went great. Can't say there are any benefits though
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Were you looking to do something expert, like fix a bug or add a new feature? There isn't any benefit otherwise.
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I thought that maybe it would be more specific to my hardware if I compiled it but I probably ended up with the same binaries openbsd provides
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Quote:
Originally Posted by mafkees1233 View Post
I thought that maybe it would be more specific to my hardware if I compiled it but I probably ended up with the same binaries openbsd provides
No, “probably”. The binaries created are exactly the same binaries as what the project provides.
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mafkees1233 mafkees1233 is offline
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I compiled the 'stable' branch though, so at least I got the latest bugfixes
Today I updated the source from cvs and there were loads of updates but syspatch only shows one
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About the only building from source I do is packages, unless I'm working on some sort of debugging. The -stable ports tree gets updates as third party application projects address and fix vulnerabilities. But the project does not have the resources to build and maintain -stable packages.

Before syspatch(8), I used to maintain a fleet of -stable servers. I haven't needed to in modern times, even though sometimes there are -stable patches which don't make it to Errata status.
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My first attempt was to build everything from source, starting with the kernel, then src and xenocara and that went great. But when I tried building ports it was unable to download some software because certain servers were down and in one case the package it tried to download failed the checksum and I couldn't find it myself, so that was a bit of a disappointment. So now I build stable but use the packages
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Quote:
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in one case the package it tried to download failed the checksum and I couldn't find it myself
Yeah, there is at least one case (and I forget which package) where upstream "re-rolled" the tarball* after the OpenBSD 6.5 release. -current had the updated checksum but I don't believe it ever made it to -stable.


*Note to release engineers: NEVER do this!!!
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Quote:
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I thought that maybe it would be more specific to my hardware if I compiled it but I probably ended up with the same binaries openbsd provides
If you want to do something ridiculous like that, create a /etc/mk.conf with the following:
Code:
CFLAGS = -O3 -pipe -march=native
LDFLAGS = -Wl,-O3
Add other CFLAGS and LDFLAGS as you see fit.
Note that you are 100% on your own if you do this. If stuff breaks, oh well.
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Quote:
Originally Posted by ibara View Post
If you want to do something ridiculous like that, create a /etc/mk.conf with the following:
Code:
CFLAGS = -O3 -pipe -march=native
LDFLAGS = -Wl,-O3
Add other CFLAGS and LDFLAGS as you see fit.
Note that you are 100% on your own if you do this. If stuff breaks, oh well.
I've ran gentoo for a long time, messing with cflags is a bad thing.
I already reinstalled openbsd wayyyy too many times
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