public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug lto/65252] Link time optimization breaks use of filenames in linker scripts
[not found] <bug-65252-4@http.gcc.gnu.org/bugzilla/>
@ 2015-02-28 14:52 ` trippels at gcc dot gnu.org
2015-03-01 7:57 ` goswin-v-b at web dot de
2015-03-02 8:50 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-02-28 14:52 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65252
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
You could use -fno-lto when compiling early.cc.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug lto/65252] Link time optimization breaks use of filenames in linker scripts
[not found] <bug-65252-4@http.gcc.gnu.org/bugzilla/>
2015-02-28 14:52 ` [Bug lto/65252] Link time optimization breaks use of filenames in linker scripts trippels at gcc dot gnu.org
@ 2015-03-01 7:57 ` goswin-v-b at web dot de
2015-03-02 8:50 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: goswin-v-b at web dot de @ 2015-03-01 7:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65252
--- Comment #2 from Goswin von Brederlow <goswin-v-b at web dot de> ---
As long as it's only one C/C++ file that works. But if one has multiple files
then -fno-lto would optimize less. I was thinking of a more general case than
mine.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug lto/65252] Link time optimization breaks use of filenames in linker scripts
[not found] <bug-65252-4@http.gcc.gnu.org/bugzilla/>
2015-02-28 14:52 ` [Bug lto/65252] Link time optimization breaks use of filenames in linker scripts trippels at gcc dot gnu.org
2015-03-01 7:57 ` goswin-v-b at web dot de
@ 2015-03-02 8:50 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-03-02 8:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65252
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |hubicka at gcc dot gnu.org
Resolution|--- |WONTFIX
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
LTO doesn't know about linker scripts and their effects (see other related
bugreports). For your case LTO partitioning might simply tear boot.o and
early.o
apart and put parts in differen LTRANS units.
I don't see any way to fix this but to teach WPA to parse linker scripts and
guide partitioning.
That means basically a WONTFIX with the known workaround to compile boot.o and
early.o without -flto.
Another workaround that might work is to use -flto-partition=1to1 (but the
filenames will still get wrong I think).
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2015-03-02 8:50 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <bug-65252-4@http.gcc.gnu.org/bugzilla/>
2015-02-28 14:52 ` [Bug lto/65252] Link time optimization breaks use of filenames in linker scripts trippels at gcc dot gnu.org
2015-03-01 7:57 ` goswin-v-b at web dot de
2015-03-02 8:50 ` rguenth at gcc dot gnu.org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).