<div dir="ltr"><div>Thank you! My PATH was set correctly, but the binary was named python3 and not python. I fixed the issue with a symlink and was able to get ~1hr into the compile. Then this:</div><div> </div><div><div style="background-color: rgb(250, 250, 250); border-color: rgb(187, 187, 187); border-style: solid; border-width: 1px; overflow-wrap: break-word;" class="prettyprint"><code class="prettyprint"><div class="subprettyprint">/cygdrive/c/Users/ryans/cp2k-7.1/src/environment.F:223:2: 223 | #error -ffast-math (GCC) or -hfpN (N>0, Cray) can lead to wrong results and numerical instabilities and are therefore no longer supported | 1~~~~ Error: #error -ffast-math (GCC) or -hfpN (N>0, Cray) can lead to wrong results and numerical instabilities and are therefore no longer supported make[3]: *** [/cygdrive/c/Users/ryans/cp2k-7.1/Makefile:466: environment.o] Error 1 make[2]: *** [/cygdrive/c/Users/ryans/cp2k-7.1/Makefile:134: all] Error 2 make[1]: *** [/cygdrive/c/Users/ryans/cp2k-7.1/Makefile:123: sopt] Error 2 make: *** [Makefile:118: all] Error 2 </div></code></div></div><div> </div><div>should I be passing a different flag than --ffast-math? </div> On Monday, March 16, 2020 at 5:07:02 AM UTC-7, brhr wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>Hello,</div></div></blockquote><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>I think this error is caused because not python in cygwin is called but python in anaconda is when you execute make.</div><div>It is necessary to install python on cygwin. If installation is done, python2.x.exe and python3.x.exe should be in the cygwin/bin directory.</div><div>If these executables exist properly, it may improve by editing the PATH specification of .bash_profile in ${HOME}(maybe cygwin/home/user) as adding 'bin' on anywhere of the left of '$PATH' such as follows:</div><div>export PATH=~/bin:/usr/local/sbin:/usr/local/bin:/sbin:/usr/sbin:/usr/bin:$PATH</div></div></blockquote><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>Hopes this helps,</div></div></blockquote><div> Aoyama Iwao </div></blockquote></div>