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Subject:	gcc and macro expansion
From:	Dmitry Bely <dbely AT mail DOT ru>
Date:	18 Jun 2000 23:29:51 +0400
Message-ID:	<8zw2eqj4.fsf@mail.ru>
Lines:	27
User-Agent:	Gnus/5.0803 (Gnus v5.8.3) XEmacs/21.1 (Big Bend)
MIME-Version:	1.0

I am trying to use STLport (www.stlport.org) with cygwin/gcc 2.95.2 and
have found the very strange problem. Here is the very simplified example:

[--- test.cpp ---]
#define INC_PATH //E/Cygnus/cygwin-b20/H-i586-cygwin32/i586-cygwin32/include/mingw32
#define MAKE_INCLUDE(file) <INC_PATH/file>
#include MAKE_INCLUDE(ctype.h)
[--- end of test.cpp ---]

MAKE_INCLUDE(ctype.h) is expanded as
<  / ctype.h > !!!!

If I define INC_PATH as 
#define INC_PATH E:/Cygnus/cygwin-b20/H-i586-cygwin32/i586-cygwin32/include/mingw32

MAKE_INCLUDE(ctype.h) is expanded as
< E:/Cygnus/cygwin-b20/H- 1 -cygwin32/ 1 -cygwin32/include/mingw32 / ctype.h >

Does anybody has an idea why this happens? I have tried other compilers
(e.g. Watcom), and they work as expected:

<E:/Cygnus/cygwin-b20/H-i586-cygwin32/i586-cygwin32/include/mingw32/ctype.h>

Help! It's the real showstopper for me :-((((

Hope to hear from you soon,
Dmitry



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