Bug 457217 - gcc actual optimization for -O, -Os, -O2, and -O3 does not match man page
gcc actual optimization for -O, -Os, -O2, and -O3 does not match man page
Product: Fedora
Classification: Fedora
Component: gcc (Show other bugs)
i386 Linux
low Severity low
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Assigned To: Jakub Jelinek
Fedora Extras Quality Assurance
: Documentation
Depends On:
  Show dependency treegraph
Reported: 2008-07-30 06:02 EDT by Edwin ten Brink
Modified: 2009-07-14 11:26 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2009-07-14 11:26:44 EDT
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Description Edwin ten Brink 2008-07-30 06:02:42 EDT
Description of problem:
When comparing the man page info on which optimizations are enabled at which
optimization level, some discrepancies can be found. Either the man-page or gcc
needs to be updated to match each other.

When the output of:
# gcc -c -Q -O --help=optimizers
# gcc -c -Q -Os --help=optimizers
# gcc -c -Q -O2 --help=optimizers
# gcc -c -Q -O3 --help=optimizers
is compared against the man-page, the following discrepancies can be observed:

Not enabled at at the levels indicated in the man-page:
           Enabled at levels -O2, -O3, -Os.
           Enabled at levels -O, -O2, -O3, -Os.
           Enabled at levels -O2, -O3, -Os.
           Enabled at levels -O2, -O3. (but is actually enabled at -O)

Not listed in output, unknown if it's enabled
           Enabled at levels -O2, -O3, -Os.
           Enabled at levels -O2, -O3.

Not listed in output

The ones not listed in the output should be shown to give a detailed overview of
what each level implies.

Version-Release number of selected component (if applicable):
# gcc --version
gcc (GCC) 4.3.0 20080428 (Red Hat 4.3.0-8)
# rpm -q gcc

How reproducible:

Steps to Reproduce:
Actual results:

Expected results:

Additional info:
Comment 1 Bug Zapper 2009-06-09 22:17:54 EDT
This message is a reminder that Fedora 9 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 9.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '9'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 9's end of life.

Bug Reporter: Thank you for reporting this issue and we are sorry that 
we may not be able to fix it before Fedora 9 is end of life.  If you 
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The process we are following is described here: 
Comment 2 Bug Zapper 2009-07-14 11:26:44 EDT
Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 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.

Thank you for reporting this bug and we are sorry it could not be fixed.

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