library RootTuple

Starting with release 2018, the code is able to produce particle vector output as a ROOT file. Here we rely on the library ​RootTuple, which is a lightweight Fortran interface to some existing ​ROOT installation.

Unfortunately, the default installation process of 'RootTuple' produces only a 'shared' library (*.so) , which is not usable with GiBUU; here we need a 'static' library (*.a). Therefore some rework is needed.

The easier way

If you have followed the download proceduce for the tar-balls, then

make buildRootTuple

should do all the job.

In case of troubles

We have changed line 10 in file GiBUU/libraries/RootTuple/RootTuple-master/src/CMakeLists.txt to

set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17") # [GiBUU]

since this C standard was needed for the actual ROOT installation.

If your compiler complaints, please check the output of the command root-config --cflags. Maybe you can lower the restrictions for your personal ROOT installation to '-std=c++11'.

The manual way

If something goes wrong, you may try to do the manual compilation procedure:

1. Download the source from ​https://github.com/davidchall/RootTuple

2. Modify the file RootTuple-master/src/CMakeLists.txt by changing one line

   add_library (RootTuple SHARED ${RootTuple_SOURCES})
   

   to

   add_library (RootTuple STATIC ${RootTuple_SOURCES})
   

3. follow the usual given build procedure of 'RootTuple'

...here internals to your ROOT installation may enter...

1. Maybe you have to add in RootTuple-master/CMakeLists.txt the line

   set (CMAKE_CXX_FLAGS "-std=c++17")
   

2. If you have errors related to missing latex2html, comment out in RootTuple-master/CMakeLists.txt

   #add_subdirectory (docs)
   

(We thank Taisiya Mineeva for pointing us to this!)

4. make the library accessible for GiBUU, e.g.:

   cp RootTuple-master/build/src/libRootTuple.a <your/path/to/GiBUU>/objects/LIB/lib/libRootTuple.100.a
   

   (Here the '...100...' indicates the version number, which is fixed to be 1.0.0; please do not change!)

After this, a new rebuild of GiBUU (make renew; make) should detect the library.