Add note about makeflags and ninja parallelism #39128
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MAKEFLAGSis an alternative toMAKE.The note about
ninjacan stay there until #38950 is fixed to warn the user e.g. to not run too many other things in parallel. It would be rather surprising if you passmake -j3there and have 7 processes running in parallel (which might eat up a lot of RAM and possibly have the OOM killer kill other processes along the way).📝 Checklist
⌛ Dependencies