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Revision as of 14:54, 14 December 2010

Feature Name


Switch GCC in Fedora 15 to 4.6.x, rebuild all packages with it.


Name: Jakub Jelinek

  • Email:

Current status

  • Targeted release: Releases/15
  • Last updated: (DATE)
  • Percentage of completion: 50%

Detailed Description

GCC 4.6.0 is going to be released in early to mid April, is currently in bugfix only mode and is going to switch into regression bug fix mode at start of January. AFAIK SUSE has done some preliminary mass package rebuild testing already, we'd perform it either during the Christmas break or shortly afterwards.

Benefit to Fedora

See for the list of changes.


All packages should be rebuilt with the new gcc once it hits dist-f15.

How To Test

GCC has its own testsuite, which is run during the package build, plus many other packages with automated tests also help to test the new gcc.

User Experience

Users will be able to see compiled code improvements and use the newly added features, such as improved C++0x support, support for the Go language, REAL*16 support in Fortran, etc.


All packages need to be rebuilt.

Contingency Plan

If bugs are discovered, I'd appreciate help from the package owners in preparing self-contained testcases to speed up analysis and fixing the bugs. Don't have time to debug issues in 8000+ packages, especially when in many cases it could be caused by undefined code in the packages etc. I don't expect we'll have to fall back to the older gcc.


Release Notes

Fedora 15 comes with GCC 4.6.0 as primary compiler, see for user visible changes in it.

Comments and Discussion