Bug#871956: lintian: false positive: binary-file-built-without-LFS-support on x32

[Adam Borowski <kilobyte@angband.pl>]

Package: lintian
Version: 2.5.52
Severity: normal

Hi!
For all 32-bit architectures lintian complains if functions using off_t
instead of off64_t are used.  On legacy architectures, this is indeed a good
check, as for old ABI compatibility reasons sizeof(off_t) is only 4.

However, new 32-bit architectures such as x32 have sizeof(off_t)==8, and
functions like lseek() and lseek64() are the same.

These include at least x32 and arm64ilp32.
Thus, could you please drop these architectures from has_lfs checks?

Reported by Thorsten Glaser, initially found in package cvs.  Most packages
don't trigger this warning as "#define _FILE_OFFSET_BITS 64" pointlessly but
harmlessly aliases off_t to off64_t.


Meow!
-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: x32 (x86_64)

Kernel: Linux 4.13.0-rc4-debug-00052-gbdd287aecdf1 (SMP w/6 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages lintian depends on:
ii  binutils                          2.29-4
ii  bzip2                             1.0.6-8.1
ii  diffstat                          1.61-1
ii  dpkg                              1.18.24
ii  file                              1:5.31-1
ii  gettext                           0.19.8.1-2+b3
ii  intltool-debian                   0.35.0+20060710.4
ii  libapt-pkg-perl                   0.1.32+b2
ii  libarchive-zip-perl               1.59-1
ii  libclass-accessor-perl            0.34-1
ii  libclone-perl                     0.38-2+b2
ii  libdpkg-perl                      1.18.24
ii  libemail-valid-perl               1.202-1
ii  libfile-basedir-perl              0.07-1
ii  libipc-run-perl                   0.96-1
ii  liblist-moreutils-perl            0.416-1+b3
ii  libparse-debianchangelog-perl     1.2.0-12
ii  libperl5.26 [libdigest-sha-perl]  5.26.0-5
ii  libtext-levenshtein-perl          0.13-1
ii  libtimedate-perl                  2.3000-2
ii  liburi-perl                       1.72-1
ii  libxml-simple-perl                2.24-1
ii  libyaml-libyaml-perl              0.63-2+b2
ii  man-db                            2.7.6.1-2
ii  patchutils                        0.3.4-2
ii  perl                              5.26.0-5
ii  t1utils                           1.40-2
ii  xz-utils                          5.2.2-1.3

Versions of packages lintian recommends:
pn  libperlio-gzip-perl  <none>

Versions of packages lintian suggests:
pn  binutils-multiarch     <none>
ii  dpkg-dev               1.18.24
ii  libhtml-parser-perl    3.72-3+b2
pn  libtext-template-perl  <none>

-- no debconf information