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3.2.1.1
cross_compiler
You can use the cross compiler toolchain to compile the uImage and related applica-
tions. (gcc version is 4.6.2 20110630)
Toolchain directory structure is as follow:
|-- bin // toolchain with prefix, such as arm-none-linux-gnueabi-gcc etc.
|-- lib // library files used for toolchain itself, not for application
|-- arm-fsl-linux-gnueabi
|-- bin // toolchain without prefix, such as gcc.-|-- debug-root // all debug tools
|-- multi-libs // all libraries and headers.
|-- armv5 // library for armv5 (i.mx 2xx). only support soft float point
|-- armv6 // library for armv6 (i.mx 3xx), soft fpu version
|-- armv7-a // library for armv7-a (i.mx5xx and i.mx6xx), hardware fpu version
|-- lib //default library. It can be used for armv4t and above.
|-- usr
|-- include //header files for the application development
|-- lib //three-part library and static built library Freescale
3.2.1.2
document
User guide of how to setup up the environment of development
3.2.1.3
image
This folder includes uImage & u-boot.
3.2.1.4
image/rootfs
Linux adopts Hierarchical File System (HFS), image/rootfs is the Linux file system in
highest level of the tree structure.
The main folders in "rootfs" are listed as follows:
- bin
- dev
- etc
- home
- lib
- mnt
- opt
- proc
- root
- sbin
- sys
-->Common programs, shared by the system, the system adminis-
trator and the users.
-->Contains references to all the CPU peripheral hardware, which
are represented as files with special properties.
-->Most important system configuration files are in /etc, this directory
contains data similar to those in the Control Panel in Windows
-->Home directories of the common users.
-->Library files, includes files for all kinds of programs needed by the
system and the users.
-->Standard mount point for external file systems.
-->Typically contains extra and third party software.
-->A virtual file system containing information about system
resources. More information about the meaning of the files in proc is
obtained by entering the command man proc in a terminal window.
The file proc.txt discusses the virtual file system in detail.
-->The administrative user's home directory. Mind the difference
between /, the root directory and /root, the home directory of the root
user.
-->Programs for use by the system and the system administrator.
--> Linux sys file system
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UBC-220 User Manual
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