bug in rootcint

Hi all,

   For about the last week I've been having problems with the SVN trunk of rootcint. The error looks like:

$ rootcint -f /afs/path/tmp/UtilCint.cc -c \
-I. -I/afs/path/tmp -I/afs/path/tmp -I/afs/path/rel/include \
-I/afs/path/rel/include -DUNIX -DLINUX -D__UNIX__ -D__LINUX__ \
-DDATAREP_LITTLE_IEEE -DDATAREP_LITTLE_ENDIAN \
-DDEFECT_NO_IOSTREAM_NAMESPACES -DDEFECT_NO_JZEXT -DDEFECT_NO_INTHEX \
-DDEFECT_NO_INTHOLLERITH -DDEFECT_NO_READONLY -
DDEFECT_NO_DIRECT_FIXED \
-DDEFECT_NO_STRUCTURE -DUSE_ROOT -I/afs/path/root/trunk-opt/include \
  LoadMinosPDG.h MsgUtil.h UtilBlockedRunningAverage.h \   UtilBlockedRunningAverageVector.h UtilHepevt.h UtilIstHEP.h \   UtilMCFlag.h UtilMath.h UtilPDG.h UtilRunningAverage.h \   UtilRunningAverageVector.h UtilStream.h UtilString.h LinkDef.h Error: link requested for unknown class UtilPDG LinkDef.h:28: Warning: Error occurred during reading source files Warning: Error occurred during dictionary source generation !!!Removing /afs/path/tmp/UtilCint.cc /afs/path/tmp/UtilCint.h !!! Error: rootcint: error loading headers...

This is on Linux SLF3.0.5 w/ gcc 3.4.3. I can't come up with a consistent test of this problem. Relevant notes:

• Our code (in this pkg) hasn't changed, only root versions which update nightly. This problem was first observed after the clean rebuild on Sunday night (other nights are incremental builds).
• This error occurs _only_ for the version of root built w/ optimization turned on. Our non-opt build of root against this same instance of the same package is fine.
• One of the packages (referencing these same classes) that was giving problems cleared up after root was re-built yesterday following a "distclean" (as opposed to the nightly incremental build)
• The problematic files have namespaces, as opposed to classes, with enums, typedefs and functions.

The fact that the problem moves around depending on library loading order and for the optimized version suggests that the error lies with an off-by-one error or a missing \0 in string handling that depends on memory layout.

-robert

Robert W. Hatcher | rhatcher_at_fnal.gov 630-840-3102 FNAL CD/REX (MINOS) | MS 220, PO Box 500, Batavia IL 60510 Received on Thu Sep 04 2008 - 16:49:15 CEST