https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67858
Bug ID: 67858
Summary: g++-5.1.1 warns about unused variable only when
optimization flag is used
Product: gcc
Version: 5.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: crayzeewulf at gmail dot com
Target Milestone: ---
Created attachment 36446
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36446&action=edit
Code that demostrates the bug.
In a large project, I've been getting some compiler warnings from g++-5.1.1
only when building the release version (which uses optimization flags) but not
while building the debug version (which disables most compiler optimization).
I've narrowed down the problem to a minimal example attached below with
commands to reproduce the problem. The problem does not occur if I use
g++-4.8.4.
This is also discussed on StackOverflow at:
http://stackoverflow.com/questions/32917767/g-5-1-1-warns-about-unused-variable-only-when-optimization-flag-is-used
