Makefile question

ROOT
1

I am trying to compile/create an so file based on old hsimple.C tutorial.
The following compiles and generates the executable but it segfaults on ./main
Surely, I am missing lots of libraries… Is there an automated way to generate the list of so files needed?

g++ -std=c++11 -c -I${ROOTSYS}/include ${ROOTSYS}/tutorials/hsimple.C -o ./hsimple.o
g++ -v -std=c++11 -I$ROOTSYS/include -L$ROOTSYS/lib mainSimple1.cxx -lCore -lHist -lCling -lRIO -lTree -lUnuran -lGpad -lMathCore hsimple.o -o main./main

Thanks

Claude

2

Hi, Claude.

You certainly can. You can use

root-config --cflags
root-config --ldflags
root-config --libs

Then just modify your calls to g++ accordingly:

g++ -std=c++11 -c `root-config --cflags` ${ROOTSYS}/tutorials/hsimple.C -o ./hsimple.o
3

Hi,
just as a note, depending on the compiler you might have to move the root-config --cflags --libs argument to the end of the gcc invocation: libraries required by compilation targets should be listed after the targets that require them, as per gcc’s documentation of the -l option.

So I would go with this:

g++ -c ${ROOTSYS}/tutorials/hsimple.C $(root-config --cflags --libs)

Cheers,
Enrico

4

Ah, good call. I know Ubuntu can be a pain about that.