[MacPorts] #49531: putty fails to build on OS X 10.11

[MacPorts]

#49531: putty fails to build on OS X 10.11
-------------------------+--------------------------------
 Reporter:  macports2@…  |      Owner:  macports-tickets@…
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.3.4
 Keywords:               |       Port:
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 I have a new installation (not an upgrade) of OS X 10.11, Xcode 7.1
 (7B91b) and the latest version of port.  The graphite2 build fails because
 unistd.h cannot be found.  A 'find /' shows the file exists in two
 locations for the Mac OS X platform:
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include
 and
 /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/sys

 Thanks.

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Ticket URL: <https://trac.macports.org/ticket/49531>
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