Build old ROOT v5

Thank you, that worked almost. At first for maybe other persons: Installing CERN ROOT (2017) – Nick's Reasearch Page (there is described how to do that via configure/make).

Unfortunately the making terminated as follows:

In file included from cint/cint/src/dict/libstrm.h:37:0,
from cint/cint/src/dict/libstrm.cxx:14:
cint/cint/lib/stream/iostrm.h:24:22: fatal error: iostream.h: No such file or directory
compilation terminated.
Makefile:597: recipe for target ‘cint/cint/src/dict/libstrm.o’ failed
make: *** [cint/cint/src/dict/libstrm.o] Error 1

I guess this has also been discovered and “solved” in Build failure with gcc 5.1.0: trying to include iostream.h - #8 by mato
But, to be honest, I do not understand what I have to do (with that file). Can someone please advice again? Thank you!

edit:

user@User-PC:~/root_old_source$ which gcc
/usr/bin/gcc

user@User-PC:~/root_old_source$ CC=/usr/bin/gcc ./configure --with-cc=“gcc-std=gnu99”
Checking for source directory … /home/user/root_old_source
Configuring for linuxx8664gcc
Checking for GNU Make version >= 3.80 … ok
Checking for C compiler … no C compiler gcc-std=gnu99 found
configure: C compiler MUST be installed
See http://root.cern.ch/drupal/content/build-prerequisites