When a gem fails, where do I find the mkmf.log file?

Question

Can\'t find the \'libpq-fe.h header

** extconf.rb failed **

Could not create Makefile due to some reason, probably lack of necessary libraries and/or

Answer 1

Windows solution

As @givanse said, the mkmf logs are in the gem installation directory. Because that can be complicated, you should just search for the mkmf file. You can do that in Windows explorer or in PowerShell

cd C:\Dev\Ruby22 # Change to reflect your Ruby install dir
Get-ChildItem mkmf* -Recurse