Why doesn't posix_platform NormalizePath resolve symlinks?

[rpav]

Is there a reason NormalizePath in platform_posix.cc uses a function which does not expand symlinks? (i.e., RelPathNotExpandSymlink) As per my comment in cquery-project/emacs-cquery#47, this appears to produce incorrect results.

For example, on my system (Arch Linux):

/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.1/../../../..
  is not:
/
  but rather:
/usr

as per:

$ realpath /bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.1/../../../..
/usr

Due to this, cquery spews tens of thousands of lines of "Could not normalize path..." rather than working. Note, cquery --check "works," in that it finds a proper command line from compile_commands.json, but it doesn't seem to actually resolve anything beyond this.