clang-format broken

[Olivier FAURAX]

Hello!

It seems clang-format, and perhaps other clang-*, are broken due to 
"option [...] registered more than once".
It seems related to several links to same or similar libraries.

$ which clang-format
/usr/bin/clang-format

$ clang-format -help
: CommandLine Error: Option 'disable-symbolication' registered more than 
once!
LLVM ERROR: inconsistency in registered CommandLine options

Thanks for the work!
-- 
Olivier FAURAX

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