M4 macro syntactical error

[Kip Warner]

Hey list,

I am having difficulty with the following simple M4 macro I've written:

   https://pastebin.com/CqK3t8Qz

It appears to emit the following when invoked from my project's
configure.ac:

   ./configure: line 17920: =$: command not found
   ./configure: line 17924: =: command not found
   ./configure: line 17943: -march=power9: command not found
   checking for POWER 9 instructions on x86_64... no

I don't expect this macro to validate the presence of a POWER 9 host on
an Intel machine, obviously. But syntactically what am I doing wrong?
This macro should always work, even on non-POWER 9 systems.

Yours truly,

-- 
Kip Warner -- Senior Software Engineer
OpenPGP signed/encrypted mail preferred
https://www.thevertigo.com

signature.asc
Description: This is a digitally signed message part