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Thread: Compiling the Kernel and CFLAGS

  1. #1
    Join Date
    Oct 2007

    Unhappy Compiling the Kernel and CFLAGS


    First up, I am a total noob. Never compiled anything from scratch in Ubuntu. Used Gentoo for a bit (relying on my l337 Google skills to fix problems), but not seriously.

    I finished just compiling my kernel (took about 5 bloody hours) today. Is there any way I can set custom CFLAGS like it is shown in the Gentoo Handbook i.e is there a global /etc/make.conf file I can edit?
    I want to compile the latest and greatest kernel from

    Finally, is there a kernel specific benchmark to see if recompiling the kernel was worth my time?

    Crappy Dell Inspiron 600m 10.10 x86

  2. #2
    Join Date
    Oct 2007

    Re: Compiling the Kernel and CFLAGS

    O.k, I did a lot of digging around and did the following.

    1. Downloaded the latest kernel from
    2. Extracted the files to a new folder named /src in the home folder.
    3. Edited the "Makefile" with the following options:
    # SHELL used by kbuild
    CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
    	  else if [ -x /bin/bash ]; then echo /bin/bash; \
    	  else echo sh; fi ; fi)
    HOSTCC       = gcc
    HOSTCXX      = g++
    HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O3 -fomit-frame-pointer -pipe -march=pentium-m
    There are other instances of CFLAGS in the Makefile, but I think these are Global options. Need to read more though. Perhaps one of the experts here can point me in the right direction? I am willing to read,all I need is a link or a pointer on what to read?

    I followed this procedure to compile the kernel--->
    Crappy Dell Inspiron 600m 10.10 x86


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