[MacPorts] #63758: libcaca @0.99.beta20_0: syntax error near `=~' during configure (10.4.11)

[MacPorts]

#63758: libcaca @0.99.beta20_0: syntax error near `=~' during configure (10.4.11)
-------------------------+-----------------------
  Reporter:  evanmiller  |      Owner:  michaelld
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:  tiger
      Port:  libcaca     |
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Comment (by ryandesign):

 Indeed, the bash regular expression operator `=~` was introduced in bash
 3. Tiger has bash 2.

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Ticket URL: <https://trac.macports.org/ticket/63758#comment:1>
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