[Bug lto/48042] lto segfaults while building Qt 4.7.2 with -g -flto -fwhole-program

[bero at arklinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48042

bero at arklinux dot org changed:

           What    |Removed                     |Added
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  Attachment #23598|0                           |1
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  Attachment #23601|0                           |1
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--- Comment #7 from bero at arklinux dot org 2011-03-09 16:27:45 UTC ---
Created attachment 23605
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23605
Much smaller test case

Small self-contained test case, source-only.

$ tar xzf bug48042.tar.gz
$ cd bug48042
$ ./bug48042.sh
In file included from
../../../include/QtCore/../../src/corelib/global/qglobal.h:899:0,
                 from :10:
../../../include/Qt3Support/../../src/qt3support/tools/q3glist.h: In member
function ‘count’:
../../../include/Qt3Support/../../src/qt3support/tools/q3glist.h:161:1:
internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper: g++ returned 1 exit status
/usr/bin/ld: lto-wrapper failed
collect2: ld returned 1 exit status


The problem goes away if -g is added to the first compiler invocation as well
-- lto seems to fall over some constructs if linking is done with -g but an
object file was built without -g.