Dan 4612db54ac Try to autodetect the location of the clang standard libraries.
On some linuxes, /usr/include belongs to GCC and the standard
libraries that work with clang are in /usr/lib/clang/8.0.0 or
some variation thereof.

This results in errors such as:

```
/../lib64/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../include/c++/8.3.0/bits/cxxabi_init_exception.h:38:10: fatal error: 'stddef.h' file not found

```

during extraction.
2019-06-11 13:49:37 +02:00
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2017-11-01 22:48:36 -03:00