The attached file TStreamerInfoReadBuffer.cxx fails to instantiate template
functions when compiled with -O2. With -O or -g things work as expected. This
is a regression that does not appear in <4.4.0.
Compile the attached file with:
g++ -O2 -m64 -c TStreamerInfoReadBuffer.cxx -o TStreamerInfoReadBuffer.o
do:
nm TStreamerInfoReadBuffer.o | grep
__ZN13TStreamerInfo10ReadBufferIPPcEEiR7TBufferRKT_iiii
and no symbol will be found.
Compile with -O:
g++ -O -m64 -c TStreamerInfoReadBuffer.cxx -o TStreamerInfoReadBuffer.o
And:
nm TStreamerInfoReadBuffer.o | grep
__ZN13TStreamerInfo10ReadBufferIPPcEEiR7TBufferRKT_iiii
00000000000603f2 S __ZN13TStreamerInfo10ReadBufferIPPcEEiR7TBufferRKT_iiii
000000000006ba70 S __ZN13TStreamerInfo10ReadBufferIPPcEEiR7TBufferRKT_iiii.eh
--
Summary: implicit instantiation of function templates fails with
-O2, works with -O and -g...
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: blocker
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: Fons dot Rademakers at cern dot ch
GCC build triplet: i686-apple-darwin9
GCC host triplet: i686-apple-darwin9
GCC target triplet: i686-apple-darwin9
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40056
