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Probably I've found tyhe solution:
I've downloaded the cygwin new release (both the 32 and the 64 bit) and I've used them to substitute
the cygwin software delivered with quartus.
Moreover remember to include during the installation of cygwin the "perl" utility.
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I return on this old thread because I have exactly the same problem described by marsi but I can't solve it.
OS: Win8.1
Quartus 13.1
Original cygwin distributed with Quartus generates a lot of "FAST_CWD pointer" warning messages
Updating cygwin eliminates the "FAST_CWD pointer" warning messages, but I'm no more able to download the elf program to Nios.
As marsi suggested, I updated both the 32bit and the 64bit parts and installed perl and afaik all other required packages.
My current situation is:
the project compiles fine, without errors
nios2-configure-sof works perfectly
nios2-download executes with no apparent error, but it actually does nothing
If I launch the Run or Debug in Eclipse I get a generic error message
I saved the old installation in \quartus\bin\cygwin_old directory.
If I go back to the original cygwin installation by simply renaming it quartus\bin\cygwin I go back to the original situation: I can still download and debug nios project, but I get again FAST_CWD warnings
Please help me. I'm really stuck on this point.
Honored Contributor
