Bug#775539: sbuild: overwrites DEB_BUILD_OPTIONS environment variable when cross-building

[Vagrant Cascadian]

Package: sbuild
Version: 0.65.0-1
Severity: normal

Thanks for maintaining sbuild!  Very excited to have cross-build support
in sbuild and enough of a toolchain within debian to make use of it!


I tried to build u-boot for armhf in an amd64 cross-build environment using:

  DEB_BUILD_OPTIONS=parallel=5 sbuild -d UNRELEASED -c sid-armhf-cross-ccache 
--arch=amd64 --host=armhf --build-dep-resolver=aptitude --no-source


Which seems to overwrite DEB_BUILD_OPTIONS rather than append nocheck
to DEB_BUILD_OPTIONS:

  User Environment
  ────────────────
  
  CONFIG_SITE=/etc/dpkg-cross/cross-config.armhf
  DEB_BUILD_OPTIONS=nocheck


Specifying in ~/.sbuildrc works fine:

  $build_environment = {
    'DEB_BUILD_OPTIONS' => 'parallel=5'
  };

User Environment
────────────────

CONFIG_SITE=/etc/dpkg-cross/cross-config.armhf
DEB_BUILD_OPTIONS=parallel=5 nocheck


I think sbuild is somehow invoking the else statement in the following code:

  $ git grep -A 2 -B 4 nocheck
  lib/Sbuild/Build.pm-    # Add cross environment config
  lib/Sbuild/Build.pm-    if ($host_arch ne $build_arch) {
  lib/Sbuild/Build.pm-            $buildenv{'CONFIG_SITE'} = 
"/etc/dpkg-cross/cross-config." . $host_arch;
  lib/Sbuild/Build.pm-            if (defined($buildenv{'DEB_BUILD_OPTIONS'})) {
  lib/Sbuild/Build.pm:                    $buildenv{'DEB_BUILD_OPTIONS'} .= " 
nocheck";
  lib/Sbuild/Build.pm-            } else {
  lib/Sbuild/Build.pm:                    $buildenv{'DEB_BUILD_OPTIONS'} = 
"nocheck";
  lib/Sbuild/Build.pm-            }
  lib/Sbuild/Build.pm-    }


I'm not sure how exactly sbuild makes use of dpkg-cross, but it looks
like dpkg-cross may be deprecated already, so perhaps other options
will need to be explored:

  https://bugs.debian.org/771496


live well,
  vagrant

-- System Information:
Debian Release: 8.0
  APT prefers testing
  APT policy: (500, 'testing'), (120, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armhf

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages sbuild depends on:
ii  adduser         3.113+nmu3
ii  apt-utils       1.0.9.5
ii  libsbuild-perl  0.65.0-1
ii  perl            5.20.1-4
ii  perl-modules    5.20.1-4

Versions of packages sbuild recommends:
ii  debootstrap  1.0.66
ii  fakeroot     1.20.2-1

Versions of packages sbuild suggests:
pn  deborphan  <none>
ii  wget       1.16-1

-- no debconf information

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