= How to confirm Kernel is support 64bit CPU =

'''Author: Che-Yuan Tu'''

從 32 位元升級到 64 位元，Linux Kernel 重編需注意的地方與部份 lib64xxx 需要升級
 
 * [結論] 參考設定下載
   * 今天編的 kernel 2.6.20 32 位元 
   * lsi 學長之前在 Fedora Core 7 的 kernel 2.6.22 64 位元的 kernel config file.

 * 64位元 linux_kernel key point
   * x86 64 支援
   * highmem 支援
   * elf32 模擬支援
   * ia32  模擬支援
 
 * lib64xxx 視需求而安裝 (以Linux krg-server 2.6.20-krg為例)
   * lib64asound2 - ALSA library (64 bit)
   * lib64asound2-dev - ALSA library development files (64 bit)
   * lib64bz2-1.0 - high-quality block-sorting file compressor library - 64bit runtime
   * lib64bz2-dev - high-quality block-sorting file compressor library - 64bit development
   * lib64ffi4 - Foreign Function Interface library runtime (64bit)
   * lib64g2c0 - Runtime library for GNU Fortran 77 applications (64bit)
   * lib64gcc1 - GCC support library (64bit)
   * lib64gfortran1 - Runtime library for GNU Fortran applications (64bit)
   * lib64mudflap0 - GCC mudflap shared support libraries (64bit)
   * lib64ncurses5 - Shared libraries for terminal handling (64-bit)
   * lib64ncurses5-dev - Developer's libraries for ncurses (64-bit)
   * lib64objc1 - Runtime library for GNU Objective-C applications (64bit)
   * lib64readline5 - GNU readline and history libraries, run-time libraries (64-bit)
   * lib64readline5-dev - GNU readline and history libraries, development files (64-bit)
   * lib64ssp0 - GCC stack smashing protection library (64bit)
   * lib64stdc++6 - The GNU Standard C++ Library v3 (64bit)
   * lib64stdc++6-4.1-dbg - The GNU Standard C++ Library v3 (debugging files)
   * lib64z1 - compression library - 64 bit runtime
   * lib64z1-dev - compression library - 64 bit development
   * libc6-dev-amd64 - GNU C Library: 64bit Development Libraries for AMD64
 
 * 開啟 64 Support options for example
{{{
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.18-1.2257
# Mon Jan 14 20:30:31 2008
#
CONFIG_X86_64=y
CONFIG_64BIT=y
CONFIG_X86=y
 

# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
CONFIG_IA32_EMULATION=y
CONFIG_IA32_AOUT=y
CONFIG_COMPAT=y
CONFIG_SYSVIPC_COMPAT=y

}}}
 
最後感謝阿德學長提供許多寶貴意見!!