Passing options to firtool in Chisel tests

[oharboe]

I thought that multiplier lowering was done by Chisel or firtool, but that was our code to work around a problem in yosys :-)

(Since fixed in yosys, need to check)

However, this got me onto the problem of passing options to firtool, and the problem below is that I expected an error from a made up option by ChatGPT -disable-multiplier-lowering

Why doesn't firtool fail with the command line below?

How do I pass options to firtool, seems like -DfirtoolOpts=-disable-multiplier-lowering is ignored.

How can I log the output of the firtool command?

https://circt.llvm.org/docs/VerilogGeneration/#controlling-output-style-with-loweringoptions

https://www.chisel-lang.org/docs/explanations/testing#command-line-arguments

java -Xms512m -Xmx32g -jar Multiplier_test.jar -R Multiplier_test_stripped.jar -e -DfirtoolOpts=-disable-multiplier-lowering -z 'latency 0'