6.29 Build Architecture Optimised Packages
The apt-build, apt-build package, a front-end to apt-get, provides a general solution to build Debian packages tuned (or optimised) for your architecture.
$ wajig install apt-build
You will be asked for some options, and these go into
/etc/apt/apt-build.conf
:
build-dir = /var/cache/apt-build/build
repository-dir = /var/cache/apt-build/repository
Olevel = -O2
march = -march=pentium4
mcpu = -mcpu=pentium4
options = " "
The built packages will be placed into
/var/cache/apt-build/repository
, an can be accessed with the
standard Debian package tools by adding the following line to the top
of /etc/apt/sources.list
(which can be done during the
installation of apt-build, apt-build:
deb file:/var/cache/apt-build/repository apt-build main
You will need deb-src
entries in your
/etc/apt/sources.list
file to be able to obtain the source
packages (see Section 6.28).
Being a front-end to apt-get, your first
apt-build command might be to update the list of known
available packages (particularly if you have just added a
deb-src
entry to /etc/apt/sources.list
), although
the following is equivalent:
$ wajig update
You can then start building packages:
$ sudo apt-build install most
You can manage a collection of packages to be recompiled and installed
instead of obtaining the default compiled versions. Create the file
/etc/apt/apt-build.list
to contain a list of such packages
and then:
$ sudo apt-build world
One way to get a full list of installed packages is:
# dpkg --get-selections | awk '{if ($2 == "install") print $1}' \
> /etc/apt/apt-build.list
Be sure to edit the list to remove, for example, gcc! Then a:
$ sudo apt-build world
will recompile and optimise all packages.
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