[MacPorts] #60976: R @4.0.2 fails to configure with Xcode 12, missing includes in bzip2 test program (was: Failed to configure R, requires bzip2 version >= 1.0.6, yet bzip2 Version 1.0.8 is installed)

[MacPorts]

#60976: R @4.0.2 fails to configure with Xcode 12, missing includes in bzip2 test
program
-----------------------+------------------------
  Reporter:  raramayo  |      Owner:  i0ntempest
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  R         |
-----------------------+------------------------

Comment (by jmroot):

 The correct config.log shows that this is the problem:
 {{{
 conftest.c:257:5: error: implicitly declaring library function 'exit' with
 type 'void (int) __attribute__((noreturn))' [-Werror,-Wimplicit-function-
 declaration]
     exit(strcmp(ver, "1.0.6") < 0);
     ^
 conftest.c:257:5: note: include the header <stdlib.h> or explicitly
 provide a declaration for 'exit'
 conftest.c:257:10: error: implicitly declaring library function 'strcmp'
 with type 'int (const char *, const char *)' [-Werror,-Wimplicit-function-
 declaration]
     exit(strcmp(ver, "1.0.6") < 0);
          ^
 conftest.c:257:10: note: include the header <string.h> or explicitly
 provide a declaration for 'strcmp'
 }}}

 The reporter of the duplicate was using the Xcode 12 beta CLTs. I would
 assume that's why everyone isn't seeing this.

-- 
Ticket URL: <https://trac.macports.org/ticket/60976#comment:6>
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