git clone https://github.com/steveicarus/iverilog.git
cd iverilog
-git checkout v11_0
+#git checkout v11_0
+git checkout d8cb29f6e0 # works ok, better than v11_0 stable
sh autoconf.sh
-./configure --prefix=/usr/local/iverilog
+./configure --prefix=/usr/local/
make -j$(nproc)
make check
make install