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Debian::DpkgCross

Name

Debian::DpkgCross - Package of dpkg-cross commonly used functions

The 2.x series of dpkg-cross is seeking to achieve its own removal by incorporating as much cross-building support as possible into dpkg itself. The number, scope and range of functions supported by this package is therefore only going to decrease. Any newly-written code using this package will need to keep up with changes in dpkg. Developers are recommended to join the debian-dpkg and debian-embedded mailing lists and keep their code under review.

Copyright and License

  Copyright (C) 2004  Nikita Youshchenko <yoush@cs.msu.su>
  Copyright (C) 2004  Raphael Bossek <bossekr@debian.org>
  Copyright (c) 2007-2009  Neil Williams <codehelp@debian.org>
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
 
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
 
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
 

Bugs

Please report bugs via the Debian Bug Tracking System.

Support

All enquiries to the "<debian-embedded@lists.debian.org"> mailing list.

MAKEFLAGS

See bug #437507 Even if the other flags are needed CC, GCC and other compiler names should *NOT* be overridden in $ENV{'MAKEFLAGS'} because this prevents packages compiling and running build tools using CC_FOR_BUILD. CDBS packages need to declare an empty override variable in debian/rules:

  DEB_CONFIGURE_SCRIPT_ENV=
 
 

Depending on progress with dpkg cross-building support, the remaining overrides may also be removed. Do not rely on these being set.

read_config

Read '$conffile' and save the definition in global variables all recognised variables.

'$crossroot' will be set by setup(). Until setup() is called all ``crossroot-<arch>'' settings are stored within '%allcrossroots'.

All package variables are stored within '%conf'.

No variables are skipped.

return: none

get_config

Return the current configuration from read_config as a hash reference.

get_version

Return the current DpkgCross version string used by all dpkg-cross scripts.

dump_debug_data

Return a hashtable of assorted debug data collated during the current run that can be processed using Data::Dumper.

rewrite_pkg_name

Converts a package name into the dpkg-cross package name.

$1 - the package name to check and convert if needed return - the cross-package name

convert_filename($)

Converts an original .deb filename into the dpkg-cross .deb filename or converts a dpkg-cross .deb filename into the original .deb filename.

returns undef on error

get_architecture

Returns the current architecture.

return: Current architecture or empty if not set.

check_arch($arch)

Checks that the supplied $arch is (or can be converted to) a DEB_HOST_GNU_TYPE that can be supported by dpkg-cross.

returns the DPKG_HOST_GNU_TYPE or undef

setup

Set global variables '$arch', '$crossbase', '$crossbin', '$crosslib32', '$crossdir', '$crossinc', '$crosslib', '$crosslib64', '$crossprefix', '$compilerpath' and '$deb_host_gnu_type' to defaults and substitute them with variables from '%conf' and '$arch'.

return: none

create_tmpdir($basename)

Safely create a temporary directory

  $1: Directory basename (random suffix will be added)
 
 

return: Full directory pathname, undef if failed

convert_path($path)

Convert path, substituting '$crossinc', '$crosslib', '$crosslib64', '$crosslib32', '$crossdir'. This function will be used while building foreign binary packages or converting GCC options.

  $1: Directory (and file) to convert.
 
 

return: Converted path.

simplify_path($path)

Simplify path. Remove duplicate slashes, ``./'', ``dir/..'', etc

$1: Path to simplify.

return: Simplified path.

get_endianness

Provide a central function to query the endianness of the current cross building architecture.

Parses /etc/dpkg-cross/cross-config.$arch to convert the autotools cache value into a general purpose string.

Returns 'big' or 'little' or undefined on error.

This function requires dpkg-cross to be installed.