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* [Bug web/51019] New: unclear documentation on -fomit-frame-pointer default for -Os and different platforms
@ 2011-11-08 1:40 solar-gcc at openwall dot com
2012-01-13 6:55 ` [Bug middle-end/51019] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: solar-gcc at openwall dot com @ 2011-11-08 1:40 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51019
Bug #: 51019
Summary: unclear documentation on -fomit-frame-pointer default
for -Os and different platforms
Classification: Unclassified
Product: gcc
Version: 4.6.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: web
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: solar-gcc@openwall.com
The texinfo documentation for GCC 4.6.2 says:
Starting with GCC version 4.6, the default setting (when not
optimizing for size) for 32-bit Linux x86 and 32-bit Darwin x86
targets has been changed to `-fomit-frame-pointer'. The default
can be reverted to `-fno-omit-frame-pointer' by configuring GCC
with the `--enable-frame-pointer' configure option.
Enabled at levels `-O', `-O2', `-O3', `-Os'.
The "when not optimizing for size" comment feels contradictory to having "-Os"
listed on the "Enabled at levels" line. Also, it is not clear what the default
is on other than "32-bit Linux x86 and 32-bit Darwin x86". In practice, I
observe the following behavior with GCC 4.6.2: on Linux/x86_64,
-fomit-frame-pointer is the default at both -O2 and -Os (I did not test
others); on Linux/i386, it is the default at -O2, but not at -Os. This needs
to be documented more clearly.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug middle-end/51019] unclear documentation on -fomit-frame-pointer default for -Os and different platforms
2011-11-08 1:40 [Bug web/51019] New: unclear documentation on -fomit-frame-pointer default for -Os and different platforms solar-gcc at openwall dot com
@ 2012-01-13 6:55 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-01-13 6:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51019
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |documentation
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-01-13
Component|web |middle-end
Ever Confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-13 06:55:22 UTC ---
Confirmed. Related to bug 13822.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-11-08 1:40 [Bug web/51019] New: unclear documentation on -fomit-frame-pointer default for -Os and different platforms solar-gcc at openwall dot com
2012-01-13 6:55 ` [Bug middle-end/51019] " pinskia at gcc dot gnu.org
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