Bug 403881 - Noisy and unnecessary "lowering visibility" warnings
Summary: Noisy and unnecessary "lowering visibility" warnings
Alias: None
Product: Fedora
Classification: Fedora
Component: gcc
Version: 8
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Jakub Jelinek
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2007-11-29 05:06 UTC by Braden McDaniel
Modified: 2009-01-09 05:22 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2009-01-09 05:22:23 UTC

Attachments (Terms of Use)
Test case (419 bytes, text/x-c++src)
2007-11-29 05:06 UTC, Braden McDaniel
no flags Details

Description Braden McDaniel 2007-11-29 05:06:31 UTC
Description of problem:
Under certain circumstances, gcc emits some very noisy and--as far as I can
tell--unnecessary "lowering visibility" warnings.

Version-Release number of selected component (if applicable):

Additional info:
The attached example demonstrates the warning as it is encountered when using
boost::mpl::for_each. The warning is triggered when the types in the type vector
have default visibility and the function object has hidden visibility. Iterating
over public types while applying a function object that is part of the
implementation is a pretty normal use case.

The gcc main line does not issue a warning in this case. It appears that the
code that emits it has been replaced upstream, but lingers in Red Hat's gcc.

The only way I have found to suppress this warning is -Wno-attributes. That
nukes all attribute-related warnings, and as such is not really an acceptable

Comment 1 Braden McDaniel 2007-11-29 05:06:31 UTC
Created attachment 272181 [details]
Test case

Comment 2 Bug Zapper 2008-11-26 08:44:44 UTC
This message is a reminder that Fedora 8 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
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Comment 3 Bug Zapper 2009-01-09 05:22:23 UTC
Fedora 8 changed to end-of-life (EOL) status on 2009-01-07. Fedora 8 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

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