直接给出示例配置:
Paths and misc options (4) Number of parallel jobs
其help的说明为:
┌────────────────────────── Number of parallel jobs ───────────────────────────┐ │ CT_PARALLEL_JOBS: │ │ │ │ Number of jobs make will be allowed to run concurently. │ │ Set this higher than the number of processors you have, but not too high. │ │ A good rule of thumb is twice the number of processors you have. │ │ │ │ Enter 1 to have only one job at a time. │ │ │ │ Enter 0 to set automatically based on how many processors the host has. │ │ │ │ Symbol: PARALLEL_JOBS [=4] │ │ Type : integer │ │ Prompt: Number of parallel jobs │ │ Defined at config/global/build-behave.in:8 │ │ Depends on: !BACKEND [=n] │ │ Location: │ │ -> Paths and misc options │
此处,设置为4,意思是:
同时运行4个进程(去执行crosstool-ng的编译过程)
很明显,多线程去编译的话,会大大缩短整个的编译时间。
此数字的设置,当然,不能随便胡乱设置。
比较常见的做法是:
CPU内核数 x 2
比如,你的是Intel的双核的CPU,那么此值就是:
2 x 2 =4
了。