#2662: gcc 4.5.0 -Os does not generate correct code
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Reporter: bdu...@… | Owner: lfs-b...@…
Type: defect | Status: new
Priority: high | Milestone: 6.7
Component: Book | Version: SVN
Severity: major | Keywords:
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Comment(by matt...@…):
Bruce, I realise you've already done loads of work in tracking this issue
down, but I'm wondering if you could figure out which optimization is the
culprit? http://gcc.gnu.org/onlinedocs/gcc-4.5.0/gcc/Optimize-
Options.html#Optimize-Options lists all of the optimization options and
most of those show at which optimization level they get turned on by.
What I'm thinking is if you could change the Kernel Makefile to set '-Os
-fno-<optimzation option>' instead of plain '-Os' to selectively turn off
individual optimization options that are explicitly mentioned in the
manual as being turned on by '-Os'. I realise that this is probably going
to be a fair bit of work unless you hit really lucky, so understand if you
don't want to expend that effort.
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Ticket URL: <http://wiki.linuxfromscratch.org/lfs/ticket/2662#comment:2>
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