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RE: Does GCC have any built-in DEBUG preprocessor flags?

From: "Rupert Wood" <me at rupey dot net>
To: "'Joseph D. Wagner'" <wagnerjd at prodigy dot net>
Cc: <gcc-help at gcc dot gnu dot org>
Date: Fri, 6 Dec 2002 18:12:15 -0000
Subject: RE: Does GCC have any built-in DEBUG preprocessor flags?

Joseph D. Wagner wrote:

> I'm wondering if GCC automatically defines any preprocessor DEBUG
> flags when executed with the -g option.

At first glance through specs and source, no.

> For example, when a program compiles on Microsoft Visual C++ in
> Debug mode, the compiler automatically defines _DEBUG as a
> preprocessor flag,

_DEBUG is auto-defined for /MDd, /MTd or /MLd - i.e. it's more "compiled
for debug runtime". /Zi and /ZI (more analagous to -g) don't trigger it.

In any case, MSVC-generated projects explicitly include -D_DEBUG on
debug compile lines.

Rup.

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