Removing # lines from .i file changes compiler behavior

[Alexandre Oliva]

On Feb 13, 2000, Martin Buchholz <martin@xemacs.org> wrote:

> # 18 "/usr/include/alloca.h" 3

> are just comments for use by the debugger and warning printer.

Nope.  They're also used to recognize system header files.

> So I guess c++ knows about avoiding warnings in system header files?

Yup.

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