[MacPorts] #37543: syck: error: conflicting types for 'syckparse'

[MacPorts]

#37543: syck: error: conflicting types for 'syckparse'
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  Reporter:  ryandesign@…  |      Owner:  lharple@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.2
Resolution:                |   Keywords:  haspatch
      Port:  syck          |
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Changes (by ryandesign@…):

 * keywords:   => haspatch


Comment:

 This happens if bison @2.7_0 is installed. Attached is a patch to fix this
 by forcing the use of the system's copy of bison, which on Mountain Lion
 is still 2.3. The configure script provides the variable "YACC" to
 override the automatic detection, unfortunately the configure script then
 checks to make sure it has not been overridden and bails out if it has,
 therefore the patch for the configure script is needed to remove that
 check. May I commit these patches? Unless you know a way to make syck work
 with newer bison, which would be preferable in case future OS X includes a
 newer bison.

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Ticket URL: <https://trac.macports.org/ticket/37543#comment:1>
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