[MacPorts] #61918: librsvg fails on big sur with llvm-objdump: Unknown command line arguments -macho -dylibs-used -non-verbose

[MacPorts]

#61918: librsvg fails on big sur with llvm-objdump: Unknown command line arguments
-macho -dylibs-used -non-verbose
--------------------------+---------------------
 Reporter:  ShadSterling  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.6.4
 Keywords:  bigsur        |       Port:  librsvg
--------------------------+---------------------
 {{{
 :info:build llvm-objdump: Unknown command line argument '-macho'.  Try:
 '/opt/local/libexec/llvm-11/bin/llvm-objdump --help'
 :info:build llvm-objdump: Did you mean '-h'?
 :info:build llvm-objdump: Unknown command line argument '-dylibs-used'.
 Try: '/opt/local/libexec/llvm-11/bin/llvm-objdump --help'
 :info:build llvm-objdump: Did you mean '--dylibs-used'?
 :info:build llvm-objdump: Unknown command line argument '-non-verbose'.
 Try: '/opt/local/libexec/llvm-11/bin/llvm-objdump --help'
 :info:build llvm-objdump: Did you mean '--non-verbose'?
 }}}

 This came up in reinstalling everything after moving to Big Sur, librsvg
 is not requested.

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Ticket URL: <https://trac.macports.org/ticket/61918>
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