G++: error: unrecognized option ‘-soname’

Question

I am trying to build SLitrani on Ubuntu 12.04 64-bit. I have already built ROOT 5.34.03 from source and I did figure out how to set the LD_LIBRARY_PATH and PATH variables for $ROOTDEV so the problem is not there but when I try to make SplineFit I get

>>> g++: error: unrecognized option ‘-soname=libSplineFit.so’
make: *** [libSplineFit.so] Error 1

I also did change all the -m32 to -m64 in the Makefiles so I don't know what is going on. I was able to get TwoPad installed but I can't continue from SplineFit. I have been on this build for quite some time and would appreciate any help.

Answer 1

From memory, soname is a linker operation, not a compiler one. So, if you're doing it with g++, you may need to change the option into something like:

-Wl,-soname=libSplineFit.so

The following transcript shows that this is necessary:

pax> g++ --soname=x -Wall -o qq qq.cpp
cc1plus: error: unrecognized command line option "-fsoname=x"

pax> g++ -Wl,-soname=x -Wall -o qq qq.cpp

pax> 

From the online GNU docs for gcc:

-Wl,option: pass option as an option to the linker. If option contains commas, it is split into multiple options at the commas.

Answer 2

I know this is an old question but after a week of struggling I thought I should post my findings.

I've successfully edited the makefiles for this so they can compile on Ubuntu 12.04 x64.

You can remove the -soname option completely, it seemingly is unnecessary.

As mentioned: all "m32" change to "m64".

You can replace "$ROOTSYS/libs" with "$ROOTLIBS"

and with TwoPad makefile reorder the library order (under LIBS += (.....)) so that -lTwoPad is NOT last on the list, and for VisuSLitrani make -lPhysMore last in its group.

As far as I know the errors saying "set but not used" can be ignored.

If any of this still doesn't work contact me back and I can send you my makefiles.