[MacPorts] #57427: gnucash upgrade fails due to unknown option "-Wno-register"

[MacPorts]

#57427: gnucash upgrade fails due to unknown option "-Wno-register"
-------------------------+---------------------
 Reporter:  Blokkendoos  |      Owner:  (none)
     Type:  defect       |     Status:  new
 Priority:  Low          |  Milestone:
Component:  ports        |    Version:  2.5.4
 Keywords:               |       Port:  gnucash
-------------------------+---------------------
 Macports v2.5.4 on Mac OS X 10.10.5
 {{{
 :info:build error: unknown warning option '-Wno-register'; did you mean
 '-Wno-reorder'? [-Werror,-Wunknown-warning-option]
 }}}
 As a workaround I patched the Cmakelists.txt file. See portfiles attached.

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Ticket URL: <https://trac.macports.org/ticket/57427>
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