[MacPorts] #39523: zlib doesn't build when clang is the default compiler (/usr/bin/cc)

[MacPorts]

#39523: zlib doesn't build when clang is the default compiler (/usr/bin/cc)
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 Reporter:  daniel@…  |      Owner:  macports-tickets@…
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.1.3
 Keywords:  clang     |       Port:  zlib
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 When Clang is used as the default compiler (i.e., /usr/bin/cc) then the
 zlib configure script may fail to properly detect that the compiler is
 "gcc"-like. This in turn causes the configure script to follow a slightly
 different code path which then fails to properly compute the shared
 library extension on Darwin.

 This is effectively the same problem as:
   http://trac.macports.org/ticket/28656
 but when the compiler path doesn't include clang in it.

 The attached patch (also submitted upstream to zlib maintainers) fixes the
 problem by patching the configure script.

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Ticket URL: <https://trac.macports.org/ticket/39523>
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