Part 1 Platform Choosing
1.Fedora Core5(linux-2.16.15 kernel)
Part 2 Cross Compile Toolchain For Arm9tdmi
•1>Two choice:
a.Download one compiled by other guys
b.Compile our own
&Problem to a:
Hard to find a toolchain fitting for the specific kernel,and sometimes really strange problem comes out;Such as “cpp0 can’t found”, “your toolchain is such bad one!” or other long long errors! So the best is:make our own toolchain, but so hard!
•2>How to compile:
Resource needed:
a.Kernel source tarball(Here I choose linux-2.6.14.7.tar.gz)
b.Binutils tarball(binutils-2.16.tar.gz)
c.Glibc(glibc-2.16;glibc-linuxthreads-2.3.5.tar.gz)
•Steps for compiling
a.Prepairing the head files
Part 3 Creat Related Files
•1.Linux driver development needs lots of headerfiles and module lib,but not contained in the system so, it required us to build for ourself;Steps are as followed:
-1]Download the kernel tarball needed;
-2]Build the kernel with all functions needed
-1>cp /boot/config-2.6.15-1.FC.********(use the config the system used) $(KERNELPATH) /.config
-2>Make menuconfig -> load the .config
-3>make all ->make moduels_install ->make install
Part 4 Update System Related
•1>Update system glibc
a.After got the tarball make another directory for building glibc(Reason:if any error ,the orignal source will not be infuenced and just remove the “new directory” )
b.Go into the new directory we made in step a,and configure for it;as:
../glibc-2.3.5/configure ARGS
ARGS are as follows:
•--prefix= PATH
Path is where you want to install glibc,default is /usr/local/
--enable-add-ons=…
With this option on but not “=” all the character will be added(normally used but take longer to compile)
The detail can be seen with ./configure -help
Attention:we must make a new direcrory in the new tarball and at least -prefix is given or else no makefile appear under the present path,so that can’t execute make and make install!
• c.Execute make
• d.make check(not forced unles error occurs)
• e.make install
•Attentions:
•1)It’s really good habit for back up the important files before update any thing in system!
The /usr/include and /lib are most important ones;and /usr/lib are for user applications so will not be influenced!
• 2)Read the “INSTALL””README” and the alike files carefully will save so much time and keep away from a lot of unimaginable problems!
• 3)The gcc tools need to be new enough for compiling files
Part 5 Kernel Compile
•1>Adding the nand table info into kernel source
•2>Configure the kernel
•3>Modify the makefile under kernel tree root
•4>make
•Attentions:
•1)serial port must be supported in kernel or else nothing seen after bootloader
•1)If needs devfs supported the init parameter needed to changed as
•noinitrd root=/dev/mtblock/2 init=linuxrc console=ttySAC0,115200
while not
noinitrd root=/dev/mtblock2 init=linuxrc console=ttySAC0,115200
