[MacPorts] #64874: moon-buggy build failure

[MacPorts]

#64874: moon-buggy build failure
---------------------------+--------------------
  Reporter:  adamcrussell  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:                |   Keywords:
      Port:  moon-buggy    |
---------------------------+--------------------

Comment (by ryandesign):

 The config.log shows that the failure to find `size_t`:

 {{{
 configure:5273: /usr/bin/clang -c -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk -arch arm64
 -I/opt/local/include
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk conftest.c
 >&5
 In file included from conftest.c:35:
 In file included from
 /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/usr/include/stdlib.h:66:
 In file included from
 /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/usr/include/sys/wait.h:109:
 In file included from
 /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/usr/include/sys/signal.h:156:
 /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/usr/include/sys/_types/_uid_t.h:31:31:
 error: cannot combine with previous 'type-name' declaration specifier
 typedef __darwin_uid_t        uid_t;
                               ^
 conftest.c:27:15: note: expanded from macro 'uid_t'
 #define uid_t int
               ^
 In file included from conftest.c:50:
 In file included from
 /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/usr/include/sys/types.h:109:
 /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/usr/include/sys/_types/_gid_t.h:31:25:
 error: cannot combine with previous 'type-name' declaration specifier
 typedef __darwin_gid_t  gid_t;
                         ^
 conftest.c:28:15: note: expanded from macro 'gid_t'
 #define gid_t int
               ^
 2 errors generated.
 }}}

 is caused by the preceding failure to find `uid_t`:

 {{{
 configure:5241: checking for uid_t in sys/types.h
 ./configure: line 5252: -I/opt/local/include: No such file or directory
 configure:5262: result: no
 }}}

 but that doesn't give us any clues about why it can't find `uid_t`. This
 is a pretty basic check. It should not fail.

 I see the same problem on my macOS 10.15.7 machine with Xcode 12.4.

 But we show successful build on our macOS 11 and earlier build machines as
 recently as 2020-12-25. I wonder what changed since then.

-- 
Ticket URL: <https://trac.macports.org/ticket/64874#comment:3>
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