After my last master pull, I noticed that I cannot build without boost,
tested on a clean Ubuntu 18.04 Docker:
apt install apt install gcc g++ scons python-dev zlib1g-dev
protobuf-compiler m4
scons -j8 build/ARM/gem5.opt
fails with:
build/ARM/systemc/ext/systemc:37:10: fatal error: boost/bind.hpp: No
such file or directory
#include <boost/bind.hpp>
^~~~~~~~~~~~~~~~
The problem can be fixed by installing:
apt install libboost-all-dev
The commit that introduced this line is
c172a64db11daa14e11b614374688934112dffd2 systemc: Include boost/bind.hpp
in the systemc header.
> This should be mostly ok to include here since gem5 itself shouldn't
> include systemc, just the sub headers that systemc brings in. systemc
> code which includes systemc *will* have a dependency on boost, but that
> at least contains the new dependency somewhat.
I think that previously this was not required for the default build.
So I just want to double check: is this intentional that the default
build depends on Boost now?
While not ideal, it is not impossible to allow this. But in that case, I
just want to check what the Boost policy will be moving forward. I'd
recommend: "no boost outside of systemc" to prevent getting large
compilation times due to Boost.
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