Re: [MacPorts] #72595: gunits @2.24: error: ‘DBL_DECIMAL_DIG’ undeclared

[MacPorts]

#72595: gunits @2.24: error: ‘DBL_DECIMAL_DIG’ undeclared
-------------------------+-------------------------------------------------
  Reporter:              |      Owner:  saj
  barracuda156           |
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.10.7
Resolution:  fixed       |   Keywords:  lion mountainlion mavericks
      Port:  gunits      |  yosemite elcapitan
-------------------------+-------------------------------------------------

Comment (by saj):

 Builds now succeed on 10.6 through 10.10.  Unfortunately, the build is
 still broken on 10.11.  I will reopen.

 llvm.org say they fixed this in `llvmorg-3.9.0`.  I wanted to know which
 Apple clang incorporated that upstream release.

 https://trac.macports.org/wiki/XcodeVersionInfo#OSX10.11

 AFAICS, there are no llvm.org version identifiers here.  In my earlier
 patch, I had resorted to the information on Wikipedia.

 https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_10.x_(since_Free_On-
 Device_Development)_2

 The row for Xcode 8.0, with Apple clang-800.0.38, looked like the minimum:
 LLVM `3.9.0svn`.  And so I wrote this:

 {{{
 compiler.blacklist-append   {clang < 800}
 }}}

 The buildbot for 10.11 logged the following.

 {{{
 DEBUG: Xcode 8.2.1, CLT 8.2.0.0.1.1480973914
 DEBUG: SDK 10.11
 }}}
 {{{
 DEBUG: compiler clang 800.0.42.1 not blacklisted because it doesn't match
 {clang < 800}
 }}}

 I can only guess the underlying llvm clang in Xcode is still too old. \\
 i.e. 800 should be substituted with some other, greater, number.

 https://stackoverflow.com/a/32997109

 > The LLVM version reported was always misleading. "3.6.0svn" means that
 code was branched some time after 3.5 and before 3.6.

 This is nuts.

 I am afraid I don't have time to set up another test environment on 10.11,
 and I cannot send a PR in good faith without testing it on 10.11 first.
 If you are on 10.11, and if this bothers you, please try bumping that
 number.

-- 
Ticket URL: <https://trac.macports.org/ticket/72595#comment:7>
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