3

There are a lot of pages, asking how to fix "W: Ignoring Provides line with DepCompareOp".

But what is "DepCompareOp" itself? I understand, that it relates to misconfigured "Provides:" field and somehow relates to packages, that depend on package provided. How can we tell whether "Provides:" is good or not?

2

"DepCompareOp" stands for "dependency comparison operator", i.e. "=", "<=", ">=", "<<" or ">>", used to compare package versions. The message comes fromapt, and is printed when a package is encountered with a "Provides" declaration including a non-equal dependency comparison operator, which is invalid. (dpkg now supports versioned-provides, which is why the error message changed to explicitly mention non-equal operators.)

So basically, a package can declare

Provides: some-other-package

in its control file and be fine, or (since mid-2014)

Provides: some-other-package (= version)

but not

Provides: some-other-package (<< version)

In the past, any mention of a version would have caused apt-based tools to print

Ignoring Provides line with DepCompareOp for package ...

whereas nowadays only the latter will produce

Ignoring Provides line with non-equal DepCompareOp for package ...

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.