[MacPorts] #28706: pkgconfig @0.25 build with clang

[MacPorts]

#28706: pkgconfig @0.25 build with clang
---------------------------------+------------------------------------------
 Reporter:  bradskins@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement          |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  ports                |     Version:                                       
 Keywords:                       |        Port:  pkgconfig                            
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 Same type of issue as ticket #28705.  Please add the following line to the
 portfile to compile with clang 2.8.

 {{{
 configure.cflags -std=gnu89
 }}}

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Ticket URL: <https://trac.macports.org/ticket/28706>
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