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List: buildroot
Subject: [Buildroot] [Bug 13046] New: Optimize for fast -Ofast is not compliant
From: bugzilla () busybox ! net
Date: 2020-06-30 8:16:21
Message-ID: bug-13046-163 () https ! bugs ! busybox ! net/
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https://bugs.busybox.net/show_bug.cgi?id=13046
Bug ID: 13046
Summary: Optimize for fast -Ofast is not compliant
Product: buildroot
Version: 2020.05
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
Assignee: unassigned@buildroot.uclibc.org
Reporter: sveyret@gmail.com
CC: buildroot@uclibc.org
Target Milestone: ---
In buildroot, it is possible to select the gcc optimization flag (Build
options/gcc optimization level).
The flag -Ofast in gcc creates code that is not compliant to standards. This is
written in gcc documentations, and also in the help when you select "optimize
for fast" in "gcc optimization level". But for someone creating an embedded
system where speed is critical, he may select this optimization without reading
the help, which would build non-working packages (I spent about a whole week
searching why NodeJS was not working on my system!)
I suggest to indicate the problem in the label like, for example: "optimize for
fast (may break packages!)".
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