[MacPorts] #28827: grads2 fails to install

[MacPorts]

#28827: grads2 fails to install
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 Reporter:  barry.j.mcinnes@…         |       Owner:  takeshi@…           
     Type:  defect                    |      Status:  new                 
 Priority:  Normal                    |   Milestone:                      
Component:  ports                     |     Version:  1.9.2               
 Keywords:                            |        Port:  grads2              
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Comment(by takeshi@…):

 I updated wgrib2. Your build failed when _png_set_longjmp_fn needed in
 libgrib2c.a was not found. I have
 {{{
 $ port installed wgrib2 libpng
 The following ports are currently installed:
   libpng @1.4.7_0+universal (active)
   wgrib2 @1.9.3a_1+g95 (active)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/28827#comment:5>
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