[MacPorts] #58855: gnucash 3.5: config error -> build failure on Mohave (was: gnucash @3.5: Unknown CMake command "check_symbol_exists")

[MacPorts]

#58855: gnucash 3.5: config error -> build failure on Mohave
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  Reporter:  LenoreHorner  |      Owner:  drkp
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.5.4
Resolution:                |   Keywords:
      Port:  gnucash       |
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Comment (by LenoreHorner):

 Following Ken's link and adding include(CheckSymbolExists) near the top of
 my CMakeLists.txt (despite not Finding check_symbol_exists in the file)
 enabled configure to complete and gnucash to build.  Something's not set
 right for the graphical interface, but that's a separate issue I expect.

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Ticket URL: <https://trac.macports.org/ticket/58855#comment:4>
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