Use crosstool tool to build a cross tool chain-1

Crosstool is a set of script tools that build and test different versions of GCC and glibc for those architectures that support glibc. It is also an open-source project, namely http: // kegel.com/crosstool. It is much easier to build a cross-tool chain with crosstool than the preceding step-by-step compilation method. This method is recommended for readers who only need to build a cross-compilation tool chain for their work. Use the crosstool tool to build required resources, as shown in Table 2.2.

Table 2.2 required resources

Installation Package
 
 
Crosstool-0.42.tar.gz
Http://kegel.com/crosstool
 
Linux-2.6.10.tar.gz
Ftp.kernel.org
 
Binutils-2.15.tar.bz2
Ftp.gnu.org
 
Gcc-3.3.6.tar.gz
Ftp.gnu.org
 
Glibc-2.3.2.tar.gz
Ftp.gnu.org
 
Glibc-linuxthreads-2.3.2.tar.gz
Ftp.gnu.org
 
Linux-libc-headers-2.6.12.0.tar.bz2
Ftp.gnu.org
 

1. Prepare resource files

Download the required resource files linux-2.6.10.tar.gz, binutils-2.15.tar.bz21_gcc-3.3.6.tar.gz, glibc-runtime, and Linux-libc-headers-2.6.12.0.tar.bz2 from the Internet. Then place these toolkit files in the newly created/home/Mike/downloads directory and decompress crosstool-0.42.tar.gz in the/home/mikedirectory. The command is as follows:

# Cd/home/Mike

# Tar-xvzf crosstool-0.42.tar.gz

2. Create a script file

Next, you need to create your own compilation script named arm. sh, to simplify the compilation of arm. sh, find a closest script file demo-arm.sh as a template, and then copy the contents of the script to arm. sh, modify arm. sh script:

# Cd crosstool-0.42

# Cp demo-arm.sh arm. Sh

# Vi arm. Sh

The modified arm. Sh script is as follows:

#! /Bin/sh

Set-ex

Tarballs_dir =/home/Mike/downloads # define the storage location of the tool chaincode, including linux-2.6.10.tar.gz, binutils-2.15.tar.bz2#gcc-3.3.6.tar.gz.

 

Result_top =/opt/crosstool # define the installation directory of the toolchain

Export tarballs_dir result_top

Gcc_languages = "C, C ++" # definitions support C and C ++ languages

Export gcc_ages

# Create the/opt/crosstool directory

Mkdir-p $ result_top

# Compile the tool chain, which takes several hours to complete.

Eval 'cat arm. dat gcc-3.3.6-glibc-2.3.2.dat 'sh all. Sh -- notest

Echo done.

3. Create a configuration file

In the arm. Sh script file, pay attention to the arm. dat and gcc-3.3.6-glibc-2.3.2.dat files, these two files are compiled as crosstool configuration files. The content of the arm. dat file is as follows, which is mainly used to define the configuration file, the name of the compilation tool chain generated, and the compilation options.

Kernelconfig = 'pwd'/arm. config # Kernel configuration

Target = arm-Linux # compiled tool chain name

Target_cflags = "-o" # compilation options

The content of the gcc-3.3.6-glibc-2.3.2.dat file is as follows, which mainly defines the library and the version it defines during the compilation process. If some libraries do not exist during the compilation process, crosstool is automatically downloaded from the relevant website. This tool is relatively intelligent and useful.

Binutils_dir = binutils-2.15

Gcc_dir = gcc-3.3.6

Glibc_dir = glibc-2.3.2

Glibcthreads_filename = glibc-linuxthreads-2.3.2

Linux_dir = linux-2.6.10

Linux_sanitized_header_dir = linux-libc-headers-2.6.12.0

4. Execute the script

After preparing the crosstool script file and configuration file, run the arm. Sh script to compile the cross-compilation tool. Run the following command:

# Cd crosstool-0.42

#./Arm. Sh

After several hours of compilation, a new cross-compilation tool will be generated under the/opt/crosstool/gcc-3.3.6-glibc-2.3.2/ARM-Linux/bin directory, which includes the following:

Arm-linux-addr2line arm-Linux-G ++ arm-Linux-LD arm-Linux-size

Arm-Linux-ar arm-Linux-GCC arm-Linux-nm arm-Linux-strings

Arm-Linux-as arm-linux-gcc-3.3.6 arm-Linux-objcopy arm-Linux-strip

Arm-Linux-C ++ arm-Linux-gccbug arm-Linux-objdump fix-embedded-paths

Arm-Linux-C ++ filt arm-Linux-gcov arm-Linux-ranlib

Arm-Linux-CPP arm-Linux-GPROF arm-Linux-readelf

5. Add Environment Variables

Input export Path =/opt/crosstool/gcc-3.3.6-glibc-2.3.2/ARM-Linux/bin: $ path

Note the following two points:

1: Switch common users during./arm. Sh

2: arm. dat target = arm-Linux. If it is arm-Linux, it is wrong.

 

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/dongliqiang2006/archive/2009/11/16/4815331.aspx