[MacPorts] #50435: fail to install mysql on EI Capitan 10.11

[MacPorts]

#50435: fail to install mysql on EI Capitan 10.11
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 Reporter:  s_brandy@…                    |      Owner:  macports-tickets@…
     Type:  defect                        |     Status:  new
 Priority:  High                          |  Milestone:
Component:  ports                         |    Version:  2.3.4
 Keywords:  'sys/types.h' file not found  |       Port:
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 my Macbook Pro is : OS X EI Capitan 10.11 and have Xcode 7.2 installed.

 $> sudo port install mysql55

 and I got fails which report 'sys/types.h' file not found. I surely run
 'Xcode-select --install' in advance.

 details please refer to attachments

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Ticket URL: <https://trac.macports.org/ticket/50435>
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