[MacPorts] #68340: go @1.17.13_0: environment variables for olders macOS versions cause bash to print "wrong substitution" and thus compiles fail.

[MacPorts]

#68340: go @1.17.13_0: environment variables for olders macOS versions cause bash
to print "wrong substitution" and thus compiles fail.
------------------------+--------------------
  Reporter:  garoffoli  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  go         |
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Comment (by RobK88):

 @garoffoli - You will get a substitution error when running `go env -w
 CGO_LDFLAGS="-g -O2 ${configure.ldflags}"` in bash since
 `${configure.ldflags}` is NOT defined in bash.

 `${configure.ldflags}` is defined in MacPorts. When you set
 `CGO_LDFLAGS="-g -O2 ${configure.ldflags}"`in a Portfile, the environment
 variable will be set properly by MacPorts since Macports knows the value
 for `${configure.ldflags}`.  Bash does not.

-- 
Ticket URL: <https://trac.macports.org/ticket/68340#comment:4>
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