Re: warning with gcc 4.1.1

Hi Boris,

   I've verified on my FC5 x86 and there are no such warning using 4.1.1. Can you double check that your /usr/local/root/include/Bytes.h is the one of 5.12.00. Compare to http://root.cern.ch/lxr/source/base/inc/Bytes.h.

Cheers, Fons.

Boris Skorodumov wrote:
> I found this message
> http://root.cern.ch/phpBB2/viewtopic.php?t=3533&start=0&postdays=0&postorder=asc&highlight=&sid=54d044689523a6fd4aaef6b487904293
>
> It is still present in v5.13.01 with gcc 4.1.1 (FC5)
> This is just all output i got:
>
> g++ -g -O3 -Wall -fPIC -Wno-deprecated -pthread -I/usr/local/root/include -c
> lab2cms.cpp
> /usr/local/root/include/Bytes.h: In function 'void tobuf(char*&, Float_t)':
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h: In function 'void tobuf(char*&, Double_t)':
> /usr/local/root/include/Bytes.h:244: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h: In function 'Float_t host2net(Float_t)':
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h: In function 'Double_t host2net(Double_t)':
> /usr/local/root/include/Bytes.h:527: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> lab2cms.cpp: In function 'void plotGraph(std::string)':
> lab2cms.cpp:792: warning: unused variable 'gr1'
> g++ -g -O3 -Wall -fPIC -Wno-deprecated -pthread -I/usr/local/root/include -c
> main.cpp
> /usr/local/root/include/Bytes.h: In function 'void tobuf(char*&, Float_t)':
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:222: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h: In function 'void tobuf(char*&, Double_t)':
> /usr/local/root/include/Bytes.h:244: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h: In function 'Float_t host2net(Float_t)':
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h:510: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> /usr/local/root/include/Bytes.h: In function 'Double_t host2net(Double_t)':
> /usr/local/root/include/Bytes.h:527: warning: dereferencing type-punned pointer
> will break strict-aliasing rules
> g++ -g -O3 lab2cms.o main.o -L/usr/local/root/lib -lCore -lCint -lHist -lGraf
> -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -pthread -lm -ldl
> -rdynamic -o lab2cms
>
>
> --
> Boris Skorodumov, PhD Student
> Physics Department
> University of Notre Dame
> In 46556, USA
> http://www.nd.edu/~bskorodo
>
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