library file path as variable

What do you mean by "the include options"? This question is so lacking in context (you don't mention which tools you're using, which versions, and so on) that it's extremely hard to give an answer without trying to guess every possible meaning for your question. You mention netlisting, but this could be auCdl netlisting, Spectre netlisting, Verilog netlisting, AMS netlisting - who knows? 

Please read the Guidelines for the Custom IC Design Forum - a clear question is much more likely to get a quick answer.

Andrew

You're right, I have two examples:

• a pwlf generator that includes a file which resides in a cell path. I use an absolute path but it would be more portable to have something like: $mylibrary_path/cellname/filename
• include file from setup->simulation files:

Same issue, I would like something like $mylibrary_path/cellname/filename

Forget my comment about netlisting; I was just guessing where the substitution would happen, but it's not important.

I tried searching the forum but I could not find anything similar.

There isn't really anything to do this built in. We've added specific cases for supporting files within cellViews - for example, the nport in analogLib can specify a lib/cell/view for the s-parameter file - but nothing general to do what you're asking for here.

If it's a definition file you're referencing, you could of course create a spectre text view and then create a symbol for that and instantiate it in the design.

Alternatively, define a UNIX env var for the library directory, and then you can do:

DEFINE mylib $MYLIBPATH

in your cds.lib, and then use $MYLIBPATH in the paths in ADE. Of course, that requires you to ensure that the env var is always set up outside of Virtuoso.

Regards,

Andrew

One other approach you could take is to put the file in the documents folder in your maestro view (if using ADE Explorer/Assembler). Then if you set this cdsenv in your .cdsinit:

envSetVal("maestro.simulation" "maestroViewEnvName" 'string "MAESTROVIEW")

then you could refer to $MAESTROVIEW/documents/thefile.scs in the definition files. 

This requires at least IC6.1.8/ICADVM20.1 ISR21 (so .500.21 at the end), although there were some subsequent fixes in parts of the flow, so using ISR27 or later would make more sense.

There is no general support for what you're asking for to reference a lib/cell/view - so this is the best option I can think of.

Andrew