Project installs a link to the optional executable /usr/local/bin/yosys-abc

[yurivict]

yosys installs /usr/local/bin/yosys-abc optionally, based on the ABCEXTERNAL variable in its makefile, but qflow relies on /usr/local/bin/yosys-abc.

Warning: Symlink '/usr/local/share/qflow/bin/yosys-abc' pointing to '/usr/local/bin/yosys-abc' which does not exist in the stage directory or in localbase

I am not sure, but /usr/local/bin/yosys-abc is probably the same as the abc executable installed by Berkeley's abc project.

qflow should allow to use one or the other, depending which one is installed.