When trying to make FFTW 3.3.10, I get the error:
../libtool: line 1719: /home/zhangxifen/miniconda3/envs/f2018/bin/x86_64-conda_cos6-linux-gnu-ar: No such file or directory
It says there is no x86_64-conda_cos6-linux-gnu-ar file. I can find x86_64-conda_cos7-linux-gnu-ar. Does anyone know which package installs this and which version do I need to get cos6 instead of cos7?