Preloader Make untar failing.

Hi,

I stumbled upon the exact same issue, Quartus 18.0 & Windows 10 here.

MKami1 answer nailed it, however personnally I did not want to delete c:\windows\system32\tar.exe from my system, so instead I opted for a one line modification of the Makefile, to avoid swapping windows-style paths by unix-style paths for this specific command:

#$(UNTAR) $(shell cygpath --unix "$(if $1,$1,$(if $<,$<,$(error ERROR: no input provided to gnu make function untar_recipe)))")

$(UNTAR) $(if $1,$1,$(if $<,$<,$(error ERROR: no input provided to gnu make function untar_recipe)))

Works fine. There is probably a much better permanent fix, but I will let Altera care about it.

Cheers

Julien