Linux Kernel compilation expert tutorial (1)

Download source code

Linux KernelIt is always evolving. The latest kernel Kernel2.6.0 officially supports USB2.0, and the most significant change in the file Suffix of the kernel module is *. o *. ko and so on. We can download the tarball source code package from www.kernel.org.

Preparations

We all know that we need to upgrade the "module-init-tools" Package first. Otherwise, when you install the kernel module file, the system will prompt you: Warning: you may need to install module-init-tools See http://www.codemonkey.org.uk/post-h..4.21-23.src.rpm.

Go to the download directory and install:

 
 

  
  
# Rpm-e -- nodeps modutils force uninstall the original modutilsRPM package) # rpm-ivh modutils-2.4.21-23.src.rpm put the source code
  
  
Package installed in the/usr/src/redhat Directory) 
  
  
# Cd/usr/src/redhat/SPECS to enter the standard file directory) 
  
  
# Rpmbuild -- bb modutils. spec to generate a binary RPM package) 
  
  
# Cd ../RPMS/i386 transfer to the location of the generated binary RPM package) 
  
  
# Rpm-ivh modutils *. rpm just generated two [modutils-2.4.21- 
  
  
23. i386.rpm and modutils-debuginfo-
  
  
2.4.21.23.i386.rpm] install the binary RPM package together !) 
 
 

Because it is on the RedHat9.0 platform, RedHat users may encounter some problems. I will slowly say that in addition to the above upgrades, there is also a file/etc/rc. d/rc. sysinit) may be defective because the/proc/ksyms file is no longer available in the new kernel Kernel2.6.0). The command to open the file is as follows:

 
 

  
  
# Vi/etc/rc. d/rc. sysinit:If! LC_ALL = C
  
  
Grep-iq nomodules/proc/cmdline 2>/dev/Null&&[-
  
  
F/proc/ksyms]; thenUSEMODULES = yfi replacement
  
  
To:If! LC_ALL = C grep-iq nomodules/proc/cmdline
  
  
2>/dev/Null; ThenUSEMODULES = yfi
 
 

That is to say, remove "& [-f/proc/ksyms]". It is best to back up the file before saving it to avoid deletion errors. This file is the initial script of the system and is very important ), in this way, the kernel can load the module. Of course, the iptable firewall can be started. Otherwise, the red "failed" of the firewall when it is started in the new kernel is very eye-catching. Check whether the content in/proc/sys/kernel/modprobe in the new kernel is/sbin/modprobe. You can also manually inject the command: # echo "/sbin/modprobe">/proc/sys/kernel/modprobe ). Start to construct the new kernel.