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Arcom Embedded Linux Technical Manual Developing software for AEL

On distributions that use other package managers you must use another tool to install

the LSB .rpm package. For example, Debian GNU/Linux provides the tool alien that

supports installing LSB .rpm packages:

# alien -ik lsb-arcom-arm-linux-libc6-2.3.1-3.noarch.rpm

Like AEL, Debian uses dpkg as its package management tool. However you

cannot install a .deb built for AEL directly in your Debian system (or vice-versa).

Doing so could damage your host system.

You must convert the AEL .deb to an LSB RPM using ael-cross-rpm (so that

the meta data and file system layout can be modified to be suitable for the host

rather than target environments) and then install the LSB .rpm package using

alien.

Other host distributions have a similar method for installing LSB packages. For details,

consult the documentation for your host distribution.

Obtaining help

You can view help about many of the utilities provided by the host environment using

the man utility. For example, to get help on the arm-linux-gcc compiler, run the following

command:

$ man arm-linux-gcc

Cross compiling applications and libraries

This section includes a number of examples in which we use the arm-linux

cross compiler. For other boards, substitute the appropriate prefix from the table

below.

Compiling a simple C application is simply a matter of using the cross compiler instead

of the regular compiler:

$ arm-linux-gcc -o example -Wall -g -O2 example.c

Tools available in the host environment

The majority of the cross compilation tools are the same as their native compilation

counterparts, with an additional prefix that specifies the target system. The prefixes for

the various target architectures are described in the following table:

Architecture Prefix Example processors

Intel x86 i386-linux- AMD SC520, AMD Geode GX1

ARM and XScale (little-endian) arm-linux- Intel PXA255

ARM and XScale (big-endian) armbe-linux- Intel IXP425

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Eurotech ZEUS Bedienungsanleitung Seite 36