[MacPorts] #60194: rust at 1.42.0: ld: symbol(s) not found for architecture x86_64

[MacPorts]

#60194: rust at 1.42.0: ld: symbol(s) not found for architecture x86_64
------------------------+--------------------
 Reporter:  nasyxx      |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.99
 Keywords:  rust clang  |       Port:  rust
------------------------+--------------------
 When updating rust from 1.41.1 to 1.42.0, it failed with:

 {{{
 --->  Computing dependencies for rust
 Warning: Your DNS servers incorrectly claim to know the address of
 nonexistent hosts. This may cause checksum mismatches for some ports. See
 this page for more information:
 <https://trac.macports.org/wiki/MisbehavingServers>
 --->  Building rust
 Error: Failed to build rust: command execution failed
 Error: See /Users/Nasy/.macports/var/macports/logs/_Users_Nasy_
 .macports_macports-ports_lang_rust/rust/main.log for details.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 }}}

 When I looked deeper into the log, I found that the error was like this
 (including the line number of the log)

 {{{
 3749   :info:build           ld: symbol(s) not found for architecture
 x86_64
 3750   :info:build           clang: error: linker command failed with exit
 code 1 (use -v to see invocation)
 3751   :info:build
 3752   :info:build error: aborting due to previous error
 3753   :info:build error: could not compile `rustc_driver`.
 }}}

 I have installed `llvm-9.0 at 9.0.1+ocaml+polly`

-- 
Ticket URL: <https://trac.macports.org/ticket/60194>
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