[MacPorts] #68716: gdal @3.8.0: Undefined symbols std::__1::__shared_mutex_base::lock_shared()

[MacPorts]

#68716: gdal @3.8.0: Undefined symbols std::__1::__shared_mutex_base::lock_shared()
----------------------------------------+--------------------
 Reporter:  nilason                     |      Owner:  (none)
     Type:  defect                      |     Status:  new
 Priority:  Normal                      |  Milestone:
Component:  ports                       |    Version:  2.8.1
 Keywords:  elcapitan, mavericks, lion  |       Port:  gdal
----------------------------------------+--------------------
 GDAL fails for El Capitan (10.11), Mavericks (10.9) and Lion (10.7) with
 "undefined symbols" linking error:

 {{{
 Undefined symbols for architecture x86_64:
   "std::__1::__shared_mutex_base::lock_shared()", referenced from:
       __ZNSt3__112shared_mutex11lock_sharedB7v160006Ev in
 cpl_vsi_mem.cpp.o
   "std::__1::__shared_mutex_base::unlock_shared()", referenced from:
       __ZNSt3__112shared_mutex13unlock_sharedB7v160006Ev in
 cpl_vsi_mem.cpp.o
   "std::__1::__shared_mutex_base::lock()", referenced from:
       __ZNSt3__112shared_mutex4lockB7v160006Ev in cpl_vsi_mem.cpp.o
   "std::__1::__shared_mutex_base::unlock()", referenced from:
       __ZNSt3__112shared_mutex6unlockB7v160006Ev in cpl_vsi_mem.cpp.o
   "std::__1::__shared_mutex_base::__shared_mutex_base()", referenced from:
       __ZNSt3__112shared_mutexC2B7v160006Ev in cpl_vsi_mem.cpp.o
 ld: symbol(s) not found for architecture x86_64
 }}}


 It is triggered by new code for GDAL 3.8.0 committed with
 [https://github.com/OSGeo/gdal/commit/dbfde657469903aba4f612a12210eaf569e242dc
 dbfde65].

 The call to the failing code has passed the following condition:

 {{{
 #if __cplusplus >= 201703L || _MSC_VER >= 1910
 }}}


 assuming the compiler supports the calls. But apparently the standard
 library doesn't contain it.


 Presently, the `gdal` port sets the the c++ standard to 2014.

-- 
Ticket URL: <https://trac.macports.org/ticket/68716>
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