[Libre-soc-bugs] [Bug 890] Static Timing Analysis of eth_mac

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=890

--- Comment #17 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
https://www.cyberciti.biz/faq/see-check-if-bash-variable-defined-in-script-on-linux-unix-macos/

this'll do.  if [ -z .... ];

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