Defaults for parallel compile and link jobs

With https://github.com/ClangBuiltLinux/tc-build/commit/f917c5c2adb5a7b2e18e592f6725399aed357952 you introduced custom options for parrallel compile and link jobs. I welcome this, thanks.

When I first had issues with compiling/linking a llvm-toolchain LLVM folks recommended to use safe settings: parallel compile jobs = 2 and … safe parallel link jobs = 1. Cannot say what the default is for linking in tc-build or LLVM upstream, but I see parallel compile jobs are set to 4 (maximum of available CPUs?) in tc-build for my Intel SandyBridge notebook. What are the default settings?

Please note @nickdesaulniers tip in the below link.

[1] https://github.com/ClangBuiltLinux/llvm-dev-conf-2020/issues/3#issuecomment-704398983

[nathanchance]

Building on a phone versus building on a laptop or server are two completely different use cases. The script aims to be as quick as possible which means building with as many compile and link jobs as ninja feels is reasonable by default. The -D option is there if it needs to be lowered but I disagree with setting any value to those options by default, especially given that LLVM doesn’t.

[dileks]

Thanks.

I dropped my compile and link jobs options. Will only add link jobs = 1. For the rest I trust NinJA. Ja means German Yes.

Nathan Chancellor [e-mail] schrieb am Di., 2. Feb. 2021, 08:26:

Yes, custom values are passed to all cmake invocations.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/ClangBuiltLinux/tc-build/issues/137#issuecomment-771428236, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAFQTSFXZWWEMR7RGXO4AXTS46SK5ANCNFSM4WP7EU7Q .