[MacPorts] #63090: Cannot build gcc7 on Big Sur

[MacPorts]

#63090: Cannot build gcc7 on Big Sur
----------------------+--------------------
 Reporter:  weitzner  |      Owner:  (none)
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  gcc7
----------------------+--------------------
 Failure when attempting to compile gcc7 on Big Sur. I have attached the
 relevant build log to this ticket. The error that is encountered is

 {{{
 :info:build ld: library not found for -lgcc_s.10.4
 :info:build collect2: error: ld returned 1 exit status
 }}}

 Upon inspecting the MacOSX SDK, this library is indeed absent, but I would
 suspect there is an alternate library to provide similar functionality and
 that someone who is familiar with this codebase would know how and how to
 adjust (hopefully) with minimal effort. Finding a solution to this issue
 is important because I have a tool that needs to be build with gcc7
 (otherwise it hangs or segfaults) and I cannot currently build it on a
 Mac.

-- 
Ticket URL: <https://trac.macports.org/ticket/63090>
MacPorts <https://www.macports.org/>
Ports system for macOS