[MacPorts] #63599: python310 @@3.10.0 builds but does not run profiles on macOS 10.11.6 llvm-profdata problem?

[MacPorts]

#63599: python310 @@3.10.0 builds but does not run profiles on macOS 10.11.6 llvm-
profdata problem?
-----------------------+-----------------------
 Reporter:  snowflake  |      Owner:  jmroot
     Type:  defect     |     Status:  assigned
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.7.99
 Keywords:             |       Port:  python310
-----------------------+-----------------------
 python310 is a new port today. I have been building python310-devel for
 many months with no problems

 This error is reported after running tests:
 {{{
 make[1]: Entering directory
 `/opt/local/var/macports/build/_Users_davidevans_macports_sources_github
 .com_macports_macports-ports_lang_python310/python310/work/Python-3.10.0'
 /opt/local/bin/llvm-profdata merge -output=code.profclangd *.profclangr
 warning: code-34741.profclangr: Unsupported instrumentation profile format
 version
 warning: code-34774.profclangr: Unsupported instrumentation profile format
 version
 warning: code-34776.profclangr: Unsupported instrumentation profile format
 version
 warning: code-34778.profclangr: Unsupported instrumentation profile format
 version
 warning: code-34780.profclangr: Unsupported instrumentation profile format
 version
 <many more deleted>
 error: No profiles could be merged.
 make[1]: *** [build_all_merge_profile] Error 1
 }}}

 The buildbot is not complaining, but there is obviously something
 different about my system. What could it be? llvm -versions?

 port select --list llvm
 Available versions for llvm:
         mp-llvm-10 (active)

-- 
Ticket URL: <https://trac.macports.org/ticket/63599>
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