How to fix library dependence in a conan package

Question

I am trying to install qt/5.14.2 with conan. Using

qt/5.14.2@bincrafters/stable

I receive

ERROR: libpq/11.5: Error in package_info() method, line 211
    self.cpp_info.components["pq"].requires.append("zlib::zlib")
    AttributeError: 'Component' object has no attribute 'requires'

OK, there is a bug in libpq/11.5

I am trying to downgrade to

libpq/11.4@bincrafters/stable

ERROR: Conflict in qt/5.14.2@bincrafters/stable:
    'qt/5.14.2@bincrafters/stable' requires 'zlib/1.2.11' while 'libpq/11.4@bincrafters/stable' requires 'zlib/1.2.11@conan/stable'.
    To fix this conflict you need to override the package 'zlib' in your root package.

BTW: Why is it not enough to require the correct version of the library, and requiring the same repository? (and require two different repositories in two different packages for the same dependence)

OK, I attempted

zlib/1.2.11@bincrafters/stable

WARN: libpq/11.4@bincrafters/stable: requirement zlib/1.2.11@conan/stable overridden by your conanfile to zlib/1.2.11@bincrafters/stable 
zlib/1.2.11@bincrafters/stable: Not found in local cache, looking in remotes...
zlib/1.2.11@bincrafters/stable: Trying with 'conan-center'...
zlib/1.2.11@bincrafters/stable: Trying with 'minres'...
zlib/1.2.11@bincrafters/stable: Trying with 'bincrafters'...
ERROR: Failed requirement 'zlib/1.2.11@bincrafters/stable' from 'libpq/11.4@bincrafters/stable'
ERROR: Unable to find 'zlib/1.2.11@bincrafters/stable' in remotes

Finally, I arrived at

libpq/11.4@bincrafters/stable
zlib/1.2.11@conan/stable
qt/5.14.2@bincrafters/stable

After this, it looks like it was oK:

Installing (downloading, building) binaries...
qt/5.14.2@bincrafters/stable: Retrieving package 93c70de10405da9f2d5a1f42b8c299ca7af869d2 from remote 'bincrafters' 
Downloading conanmanifest.txt
Downloading conaninfo.txt
Downloading conan_package.tgz
....qt/5.14.2@bincrafters/stable: Package installed 93c70de10405da9f2d5a1f42b8c299ca7af869d2
qt/5.14.2@bincrafters/stable: Downloaded package revision 0

However, the install fails with

  CMake was unable to find Qt5, put qmake in your path or set
  QTDIR/QT_QMAKE_EXECUTABLE.

The package is downloaded, I see all components in the corresponding subdirectory in my home directory. However, unlike the other components, it is not installed, before CMake attempts to find it.

What do I wrong?

Do you mean this line? find_package(Qt5 COMPONENTS Core Network Widgets Concurrent PrintSupport Test #LinguistTools REQUIRED) — katang, Jul 22 '20 at 16:31
In particular, but could you post all cmake file that you have please? — ymochurad, Jul 23 '20 at 12:03
Try https://docs.conan.io/en/latest/versioning/introduction.html#dependencies-overriding — Dmitry Sokolov, Aug 11 '20 at 21:57

score 1 · Answer 1 · answered Aug 11 '20 at 06:41

1

In case of any strange behavior of conan, upgrade! For me, switch 1.24.0 -> 1.28.1 with configs clean up fixed the same problem with libpq/11.5

answered Aug 11 '20 at 06:41

sanblch

31
1

How to fix library dependence in a conan package

1 Answers1