http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54145
Bug #: 54145
Summary: [4.6/4.7 Regression] no symbol generated for `void
QMailThreadSortKey::deserialize<QDataStream>(QDataStre
am&)'
Classification: Unclassified
Product: gcc
Version: 4.7.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: d...@gcc.gnu.org
Created attachment 27911
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27911
preprocessed source
[forwarded from http://bugs.debian.org/667341]
seen when building the qmf testsuite with 4.7 or the trunk.
g++ -m64 -Wl,-O1 -o build/tst_qmailthread tst_qmailthread.o
-L/usr/lib/x86_64-linux-gnu -L../../src/libraries/qmfclient/build -lqmfclient
-lQtTest -lQtCore -lpthread
tst_qmailthread.o: In function `tst_qmailthread::test_threadKeys()':
tst_qmailthread.cpp:(.text+0x559b): undefined reference to `void
QMailThreadSortKey::deserialize<QDataStream>(QDataStream&)'
collect2: error: ld returned 1 exit status
make[3]: *** [build/tst_qmailthread] Error 1
make[3]: Leaving directory
`/home/packages/tmp/qmf-1.0.7~2011w23.2/tests/tst_qmailthread'
the symbol is emitted in qmailthreadsortkey1.cpp, when built with 4.6 (both
with -O1 and -O2), and with 4.7 with -O1, but not with -O2. Same behavior for
the trunk.
$ g++ -c -O1 -Wall -W -fPIC -o qmailthreadsortkey1.o qmailthreadsortkey1.cpp
$ objdump -C -t qmailthreadsortkey1.o |grep deserialize
0000000000000000 l d
.text._ZN15MailSortKeyImplI18QMailThreadSortKeyE11deserializeI11QDataStreamEEvRT_
0000000000000000
.text._ZN15MailSortKeyImplI18QMailThreadSortKeyE11deserializeI11QDataStreamEEvRT_
0000000000000000 l d
.text._ZN18QMailThreadSortKey11deserializeI11QDataStreamEEvRT_ 0000000000000000
.text._ZN18QMailThreadSortKey11deserializeI11QDataStreamEEvRT_
0000000000000000 w F
.text._ZN15MailSortKeyImplI18QMailThreadSortKeyE11deserializeI11QDataStreamEEvRT_
00000000000000a1 void
MailSortKeyImpl<QMailThreadSortKey>::deserialize<QDataStream>(QDataStream&)
0000000000000000 w F
.text._ZN18QMailThreadSortKey11deserializeI11QDataStreamEEvRT_ 0000000000000048
void QMailThreadSortKey::deserialize<QDataStream>(QDataStream&)
$ g++ -c -O2 -Wall -W -fPIC -o qmailthreadsortkey1.o qmailthreadsortkey1.cpp
$ objdump -C -t qmailthreadsortkey1.o |grep deserialize
$
