Problems building a profiled ROOT version on SL3

ROOT
1

Hi everybody,

on “Scientific Linux SL Release 3.0.3” with gcc323 I tried to build ROOT 4.01.02
with profiling support. I added a ‘-pg’ to the OPTFLAGS in config/Makefile.linux
and started the make. Everything worked as expected up to the point when
rootcint_tmp is run:

Generating dictionary netx/src/G__Netx.cxx…
utils/src/rootcint_tmp -f netx/src/G__Netx.cxx -c -Ixrootd/src/xrootd/src netx/inc/TXAbsNetCommon.h netx/inc/TXConnectionMgr.h netx/inc/TXDebug.
h netx/inc/TXError.h netx/inc/TXInputBuffer.h netx/inc/TXLogConnection.h netx/inc/TXMessage.h netx/inc/TXMutexLocker.h netx/inc/TXNetConn.h netx
/inc/TXNetFile.h netx/inc/TXPhyConnection.h netx/inc/TXSocket.h netx/inc/TXUnsolicitedMsg.h netx/inc/TXUrl.h netx/inc/LinkDef.h
gmake: *** [netx/src/G__Netx.cxx] Segmentation fault

Is this a known problem? Or is there a workaround (or even a solution) for this
problem?

Thanks,
Matthias

2

Hi,

not seen this problem yet :wink: And no idea on how to fix it since it looks like a compiler issue. You could try profiling with valgrind/cachegrind, which does not need a recompile with a special option (just compilation with the debug option).

Cheers, Fons.

3

Hi Fons,

thanks for the prompt reply. Running in valgrind has the disadvantage that things
run very slow and it takes ages to profile the BaBar reco and simu applications.
And I guess profiling the code that was compiled with -g will give different results
compared with the code compiled with -O and w/o -g. And we can not simply
compare the outcome with previous releases.

You think it’s a compiler problem. I’ll try with different gcc versions and see what
happens.

Greetings,
Matthias

4

Hi Fons,

I tried with gcc3.3.1 (instead of gcc3.2.3) and everything worked. Looks like we
had bad luck when choosing the compiler version for BaBar.

Matthias