Gunther Nikl - pr14516 and GCC 3.4 (original) (raw)

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• From: Gunther Nikl
• To: gcc at gcc dot gnu dot org
• Cc: mmitchel at gcc dot gnu dot org, geoffk at geoffk dot org, ian at airs dot com
• Date: Wed, 30 Nov 2005 16:06:40 +0100
• Subject: pr14516 and GCC 3.4

Hello!

This PR is about missing USER_LABEL_PREFIX for static variables. The issue was fixed for 4.0, but for 3.4 there won't be a fix as stated in the audit trail by Mark Mitchell in comment #15. He probably based his decision on comment #14, where Geoff Keating states that this bug does only affect debugging programs that don't have full debugging info. That conclusion is wrong, the bug has a much more severe impact! A missing USER_LABEL_PREFIX can led to assembler errors if the variable name matches the name of a machine register if registers are used without a prefix and thats the default for a.out systems. This bug prevents using GCC 3.4 on targets with a nonzero USER_LABEL_PREFIX safely. Since 3.4 is the last 3.x version it should be usable on such system safely.

A proposed patch in comment #7 was rejected in comment #8 without giving any details what problems the patch might cause. Can this bug get fixed with minimal efforts?

Gunther

• Follow-Ups:
  • Re: pr14516 and GCC 3.4
    * From: Ian Lance Taylor
  • Re: pr14516 and GCC 3.4
    * From: Mark Mitchell