[MacPorts] #63261: cmake @3.20.5_1: rpath error when linking any project on 10.4

[MacPorts]

#63261: cmake @3.20.5_1: rpath error when linking any project on 10.4
-------------------------+-----------------------
  Reporter:  evanmiller  |      Owner:  michaelld
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:  tiger
      Port:  cmake       |
-------------------------+-----------------------

Comment (by kencu):

 Yes, only Tiger has changed, in the commit you noted
 <https://gitlab.kitware.com/cmake/cmake/-/commit/4aed96e2309e64571aabfda263b3ca4c4f62d619>

 In this file:
 {{{
 Modules/Platform/Darwin.cmake
 }}}

 {{{
 set(CMAKE_SHARED_MODULE_SUFFIX ".so")
 set(CMAKE_MODULE_EXISTS 1)
 set(CMAKE_DL_LIBS "")
 -
 - # Enable rpath support for 10.5 and greater where it is known to work.
 - if("${DARWIN_MAJOR_VERSION}" GREATER 8)
 -   set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")
 - endif()
 + set(CMAKE_SHARED_LIBRARY_RUNTIME_C_FLAG "-Wl,-rpath,")

 foreach(lang C CXX OBJC OBJCXX)
   set(CMAKE_${lang}_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version
 ")
 }}}

 So it would seem that a simple patch that reverts that, and we are back in
 business on Tiger.

 Luckily MacPorts has almost exclusively avoided using @rpath references,
 so we should be undamaged here.

-- 
Ticket URL: <https://trac.macports.org/ticket/63261#comment:9>
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