Error with make

[weiT1993]

error_logs.txt

I am trying to install qsim on a linux machine. I did

mkdir build && cd build && cmake3 ..

which successfully ran. However, running

make

in the root directory produces the above error logs. I am not an experienced C++ user, please bear with me if this is a stupid question. Thank you!

[95-martin-orion]

From the error logs:

This file requires compiler and library support for the ISO C++ 2011 standard.

Our Makefile assumes that C++11 is enabled - in your case, you can either:

1. Add -std=c++11 to the CXXFLAGS line in the top-level Makefile, or
2. Build using Bazel (the .bazelrc enforces use of C++11).

Hope that helps!

[weiT1993]

error_logs.txt

Thanks, that gets me through the first errors. But there are other errors appearing now.

[95-martin-orion]

From the file:

error: use of deleted function
‘std::basic_ifstream<char>::basic_ifstream(const std::basic_ifstream<char>&)' {...}

This is a known error when using older versions of gcc, highlighted in issue #84. Your previous error logs indicate you are using gcc-4.8.2 -- if possible, I would recommend updating your gcc version, as we currently don't plan to support gcc-4.8.x

@sergeisakov, this shows that some subset of users may be using these older gcc versions - should we reconsider adding support for these versions?

[weiT1993]

I updated to gcc-8.3.1. However, make still produces the following errors:
error_logs.txt

[95-martin-orion]

Hmm...that indicates that your system does not use AVX by default. That should be fine, since PR #82 added multiplexing for (AVX|SSE|basic) simulators, but obviously something's not quite right.

You can try replacing -march=native in the Makefile with -mavx2 -mfma, but if your machine doesn't support AVX then that may fail as well.

@sergeisakov, could you take a look at this? I think the Bazel tests only check the AVX case - we probably should expand them to cover SSE and basic as well.

[weiT1993]

I switched to a newer Skylake server and it works now, so I am closing this issue. Thanks!