Yes, that works great !! Thanks !!!
On 9 Feb 2004, Fons Rademakers wrote:
> Hi Robert,
>
> please make sure that libNew.so is the first of all libs, to do that
> use "root-config --new --glibs"
>
> Cheers, Fons.
>
>
>
> On Mon, 2004-02-09 at 16:28, Robert Michaels wrote:
> > Using ROOT 3.05-07 with gcc 3.2.3 on Red Hat Enterprise Linux WS release 3
> > and the same problem occurs with ROOT 3.10-02 (same gcc and RedHat).
> >
> > My problem is with the following TMapFile example. Although it does work
> > successfully as a macro run under rootn.exe, the compiled code gives an
> > error message and does not produce a map file. A similar problem was
> > reported by Jianglai Liu in roottalk Nov 18, 2003, but with no resolution.
> >
> > 1. First, here is what works:
> >
> > rootn.exe
> > root [0] .x hprod.cxx
> >
> > (--> Everything fine, the mapfile "hsimple.map" is created and
> > contains a histogram.)
> >
> > 2. Here is what does NOT work -- produces no map file
> >
> > ./hprod
> > Error in <TMapFile::TMapFile>: no memory mapped file capability available
> > Use rootn.exe or link application against "-lNew"
> >
> > (--> But it was linked to lNew, see below. Also $LD_LIBRARY_PATH and
> > $ROOTSYS are correct.)
> >
> > The question is why does the compiled version fail if I did in fact
> > link against "-lNew" ? Another hint is that on another RH distribution
> > (RH 8.0 with gcc 3.2.3 and the above versions of ROOT) the compiled code
> > does successfully run with the same Makefile. So, it may be difficult
> > to reproduce since it does work on some systems.
> >
> > Details:
> >
> > Here is the successful macro "hprod.cxx"
> >
> > { // macro version (run in rootn.exe)
> >
> > // Set the map address as per instructions (using rootn.exe)
> > // http://root.cern.ch/lxr/source/base/src/TMapFile.cxx#1065
> > TMapFile::SetMapAddress(0x41d92000);
> >
> > TMapFile* mfile = TMapFile::Create("hsimple.map","RECREATE", 100000,
> > "Demo memory mapped file with histograms");
> >
> > TH1F* hpx = new TH1F("hpx","This is the px distribution",100,-4,4);
> >
> > Float_t px, py;
> > int ii = 0;
> > while (1) {
> > gRandom->Rannor(px,py);
> > hpx->Fill(px);
> > if (!(ii % 100)) {
> > mfile->Update();
> > cout << "Update "<<ii<<endl;
> > }
> > ii++;
> > gSystem->Sleep(40);
> > }
> > }
> >
> >
> > ----------------
> > And here is the source of the compiled code (identical to macro
> > except for header stuff)
> >
> > #include <TROOT.h>
> > #include <TMapFile.h>
> > #include <TH1.h>
> > #include <iostream>
> > #include <TRandom.h>
> > #include <TSystem.h>
> >
> > using namespace std;
> > int main()
> > {
> >
> > // Set the map address as per instructions (using rootn.exe)
> > // http://root.cern.ch/lxr/source/base/src/TMapFile.cxx#1065
> > TMapFile::SetMapAddress(0x41d92000);
> >
> > TMapFile* mfile = TMapFile::Create("hsimple.map","RECREATE", 100000,
> > "Demo memory mapped file with histograms");
> >
> > TH1F* hpx = new TH1F("hpx","This is the px distribution",100,-4,4);
> >
> > Float_t px, py;
> > int ii = 0;
> > while (1) {
> > gRandom->Rannor(px,py);
> > hpx->Fill(px);
> > if (!(ii % 100)) {
> > mfile->Update();
> > cout << "Update "<<ii<<endl;
> > }
> > ii++;
> > gSystem->Sleep(40);
> > }
> > }
> >
> >
> > ---------------------
> > And here is the (simplified) Makefile for the compiled code
> >
> > ROOTCFLAGS = $(shell root-config --cflags)
> > ROOTLIBS = $(shell root-config --libs)
> > ROOTLIBS += $(ROOTSYS)/lib/libNew.so
> > ROOTGLIBS = $(shell root-config --glibs)
> > ROOTGLIBS += $(ROOTSYS)/lib/libNew.so
> >
> > CXXFLAGS = -O -Wall -fPIC -I$(ROOTSYS)/include -g
> > CC = g++
> > OPTIM=
> > CXXFLAGS +=$(ROOTCFLAGS)
> > LIBS = $(LIBM) $(ROOTLIBS) $(ROOTGLIBS)
> > hprod: hprod.o
> > $(CC) $(CXXFLAGS) -o hprod hprod.o $(LIBS)
> >
> >
> > ---------------------
> > And here is what the compilation says (it seems "-lNew" is linked)
> >
> > rm *.o ; make
> > g++ -O -Wall -fPIC -I/apps/root/3.05-07-gcc3.2.3/root/include -g -D_REENTRANT -I/apps/root/3.05-07-gcc3.2.3/root/include -c hprod.C
> > g++ -O -Wall -fPIC -I/apps/root/3.05-07-gcc3.2.3/root/include -g -D_REENTRANT -I/apps/root/3.05-07-gcc3.2.3/root/include -o hprod hprod.o -L/apps/root/3.05-07-gcc3.2.3/root/lib -lCore -lCint -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lpthread -lm -ldl -rdynamic /apps/root/3.05-07-gcc3.2.3/root/lib/libNew.so -L/apps/root/3.05-07-gcc3.2.3/root/lib -lCore -lCint -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix -lPhysics -lGui -lpthread -lm -ldl -rdynamic /apps/root/3.05-07-gcc3.2.3/root/lib/libNew.so
> >
> > ----
> > thanks !
> > Bob Michaels
> > Jefferson Lab
> --
> Org: CERN, European Laboratory for Particle Physics.
> Mail: 1211 Geneve 23, Switzerland
> E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248
> WWW: http://www.rademakers.org/fons/ Fax: +41 22 7679480
>
>
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