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I have set the BR2_JLEVEL to 2 ; Not sure how this option works in buildroot ? can somebody give details on how it works in buildroot as I am not seeing improvements in my build timing.
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Buildroot is a tool that simplifies and automates the process of building a complete Linux system for an embedded system, using cross-compilation. In order to achieve this, Buildroot is able to generate a cross-compilation toolchain, a root filesystem, a Linux kernel image and a bootloader for your target.
Buildroot is a set of Makefiles and patches that simplifies and automates the process of building a complete and bootable Linux environment for an embedded system, while using cross-compilation to allow building for multiple target platforms on a single Linux-based development system.
BR2_JLEVEL is equivalent to running 'Make' with the option -j.
The man-page for 'make' states
-j [jobs], --jobs[=jobs]
Specifies the number of jobs (commands) to run simultaneously. If there is more than one -j option, the last one is effective. If the -j option is given without an argument, make will not limit the number of jobs that can run simultaneously.
So running with BR2_JLEVEL=2 will start two compile processes at the same time, and thus speedup compile time, especially if you have more than one CPU.
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