Package: dpkg-dev
Version: 1.21.15
Severity: normal
dpkg-gencontrol should also simplify OR(|)-ed lists of alternative
Depends (and friends) by eliminating duplicates.
E.g. after applying ${substvars} and [arch1 arch2] limitations currently
a result could be
Depends: foo | bar | foo | baz
which should be simplified by eliminating the second 'foo'.
If 'foo' contains version constraints, only entries with identical
version constraints should be considered for elimination.
Defining superseding rules for differing versioned constraints might not
be trivial ...
foo (>> 2) | foo (>> 1) supersedes
foo (>> 1) | foo (>> 2) does not supersede
Practical examples:
1) nvidia-cuda-toolkit has
Depends: gcc-${cuda-default-gcc-version} | gcc-11 | gcc-10 | ...
where cuda-default-gcc-version is currently one of {10, 11} and set once
in d/rules.defs (and used in several places)
2) libcuda1/libnvidia-tesla-cuda1 in experimental will soon have
Recommends: ${nvidia}-kernel-dkms (= ${binary:Version}) |
${nvidia}-kernel-${version} | ${nvidia}-open-kernel-${version} |
nvidia-open-kernel-${version}
where ${nvidia} either substitutes 'nvidia' or 'nvidia-tesla' resulting
in a duplicate nvidia-open-kernel-${version} for libcuda1.
Andreas
