[MacPorts] #30041: Provide API for compiler blacklisting/whitelisting

[MacPorts]

#30041: Provide API for compiler blacklisting/whitelisting
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 Reporter:  jeremyhu@…             |       Owner:  macports-tickets@…                   
     Type:  enhancement            |      Status:  new                                  
 Priority:  Normal                 |   Milestone:                                       
Component:  base                   |     Version:                                       
 Keywords:                         |        Port:                                       
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Comment(by jmr@…):

 Replying to [comment:2 snc@…]:
 > Why not just implement this akin like `supported_archs`?
 As jeremyhu said via email:
 > But only having a whitelist would result in new compilers not being
 used.  I'd rather have both options (blacklist + fallback and whitelist).

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Ticket URL: <https://trac.macports.org/ticket/30041#comment:4>
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