<p>Thanks for reminding the tips, it seems like I managed to break Xcode at that time...<br>
At least, I can compile on this mac OS configuration:</p>
<pre><code>$ uname -a
Darwin MBP-de-Nicolas 18.7.0 Darwin Kernel Version 18.7.0: Thu Jan 23 06:52:12 PST 2020; root:xnu-4903.278.25~1/RELEASE_X86_64 x86_64
$ clang -v
Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin18.7.0
Thread model: posix
</code></pre>

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