[Bug lto/65252] Link time optimization breaks use of filenames in linker scripts

2015-03-02 Thread rguenth at gcc dot gnu.org
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).


[Bug lto/65252] Link time optimization breaks use of filenames in linker scripts

2015-02-28 Thread trippels at gcc dot gnu.org
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.


[Bug lto/65252] Link time optimization breaks use of filenames in linker scripts

2015-02-28 Thread goswin-v-b at web dot de
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.