Gem5 install problems. scons build/ARM/gem5.opt

[Liangxiangeng]

OS：Linux redhat 6.8.
GCC：4.8.5
Python：2.7.8
Scons: 3.1.1
zlib: 1.2.3
m4:1.4.13
protobuf:2.5.0
pydot:1.4.1
When "scons build/ARM/gem5.opt" There are some errors
For example:
ext/pybind11/include/pybind11/pytypes.h:735:78: error: 'PyCapsule_CheckExact' was not declared in this scope
ext/pybind11/include/pybind11/pytypes.h:1100:88: error: 'PyCapsule_GetContext' was not declared in this scope
ext/pybind11/include/pybind11/pybind11.h:770:20: error: 'it' was not declared in this scope
Why there are so many not declared parts?
Thank you!

[cirosantilli2]

Hi,

I'm not sure about these errors, I don't get them on Ubuntu 18.04, what's your gem5 git commit?

Try to have a look at the source to figure it out, most build errors are just trivial problems.

Generally speaking, newer GCC will work better, can you try using a newer one as well e.g. with scons CXX=g++-6 --verbose?

Here is a Ubuntu 18.04 Docker setup that successfully builds gem5 for you to diff you the problem.

Related unanswered question on the mailing list: https://www.mail-archive.com/gem5-users@gem5.org/msg14633.html