[H-GEN] Rebuilding kernel modules

[Gary Price (ICT)]

I needed to build a new kernel, so I followed the instructions in my Red Hat 7.3 customisation guide (very similar to those in the kernel HOWTO). Everything worked fine but it took four hours on the 200 MHz pentium I was using. Then I discovered I needed to change the kernel slightly (compile RTC as a module). Because of the recommendation to "make clean", the build took just as long as the first time. As so little has changed, is it really necessary to "make clean"? I would appreciate a reference to documentation on how to reduce the build time for a new kernel when (1) starting from a known compiled kernel and (2) only small changes in the .config file have been made.

Thanks
Gary Price
Intelligent Compression Technologies

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