[MacPorts] #57551: cmake @3.12.4 does not build on Mac OS X 10.4.11, Tiger, because it does not knaw hat unsetenv() does no exist here

[MacPorts]

#57551: cmake @3.12.4 does not build on Mac OS X 10.4.11, Tiger, because it does
not knaw hat unsetenv() does no exist here
------------------------+--------------------
  Reporter:  ballapete  |      Owner:  (none)
      Type:  defect     |     Status:  closed
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.5.4
Resolution:  duplicate  |   Keywords:  tiger
      Port:  cmake      |
------------------------+--------------------

Comment (by ballapete):

 Replying to [comment:1 michaelld]:
 > @kencu: Is this a function we can get into "macports-legacy-support"?
 Seems like an obvious addition!

 Don't know. The code of the function is:

 {{{
 int uv_os_unsetenv(const char* name) {
   if (name == NULL)
     return UV_EINVAL;

   if (unsetenv(name) != 0)
     return UV__ERR(errno);

   return 0;
 }
 }}}

 My patch looks simply like this:

 {{{
 --- Utilities/cmlibuv/src/unix/core.c.orig      2018-11-02
 13:15:50.000000000 +0100
 +++ Utilities/cmlibuv/src/unix/core.c   2018-11-10 01:31:17.000000000
 +0100
 @@ -1293,8 +1293,13 @@
    if (name == NULL)
      return UV_EINVAL;

 +  /* Mac OS X 10.4, Tiger, has void unsetenv() */
 +#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
    if (unsetenv(name) != 0)
      return UV__ERR(errno);
 +#else
 +  unsetenv(name);
 +#endif

    return 0;
  }
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/57551#comment:3>
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