[cfe-dev] Why can't I parse the whole AST？

[周书林 via cfe-dev]

In osx 10.11， I can compile the postfix-3.0.3 and dump the whole AST of
src/global/mail_params.c with clang-check.
But in Linux Mint 17.2, I can compile the postfix-3.0.3 and produce the
compile_commands.json, but when use clang-check to dump the same source
file, some error occurred. And in the parsed AST, some sub-tree also is
empty. For example, Parsed-AST.png and Unparsed-AST.png in attachments.
Why did this happen?
Sincerely hope for your help.
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