[MacPorts] #39975: root: Add --enable-cxx11 when using libc++

[MacPorts]

#39975: root: Add --enable-cxx11 when using libc++
--------------------------+------------------------
  Reporter:  jfcaron@…    |      Owner:  jeremyhu@…
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.2.0
Resolution:               |   Keywords:
      Port:  root         |
--------------------------+------------------------

Comment (by jeremyhu@…):

 Not exactly.  I'm thinking this:

 {{{
 Index: Portfile
 ===================================================================
 --- Portfile    (revision 113119)
 +++ Portfile    (working copy)
 @@ -111,6 +111,26 @@
                      --enable-fink \
                      --enable-gdml

 +platform darwin {
 +    set cxx_stdlib {}
 +
 +    if {[info exists configure.cxx_stdlib] &&
 +        ${configure.cxx_stdlib} ne {} &&
 +        [string match *clang* ${configure.cxx}]} {
 +        set cxx_stdlib ${configure.cxx_stdlib}
 +    } elseif {[string match *clang* ${configure.cxx}] &&
 +              ${os.major} >= 13} {
 +        set cxx_stdlib libc++
 +    } else {
 +        set cxx_stdlib libstdc++
 +    }
 +
 +    if {${cxx_stdlib} == "libc++"} {
 +        configure.args-delete --disable-c++11
 +        configure.args-append --enable-c++11
 +    }
 +}
 +
  universal_variant   no

  default_variants    +ssl +xml +gsl +minuit2 +tmva +roofit +graphviz
 +opengl +soversion
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/39975#comment:16>
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