It seems I've come upon an interesting issue, probably a bug. Here it
is:
I have a header file that defines __stdcall, __fastdecl and __cdecl.
If the preprocessor uses the CPLUS_INCLUDE_PATH to find that header
file, then it does not issue a warning saying that any of the above
identifiers has been redefined. If, however, it does not use that
environment variable, then it DOES issue the warning.
Angel Tsankov
[EMAIL PROTECTED]
----- Original Message -----
From: "Chan Kar Heng" <[EMAIL PROTECTED]>
To: "cygwin mailing list" <cygwin@cygwin.com>
Sent: Sunday, August 14, 2005 9:46 AM
Subject: Re: g++ defines for win32
another way:
echo "#include <stdio.h>" | gcc -dM -E -
... but this only shows macros defined for the current target
platform unlike -dumpspecs which shows everything.
(in the above, the include file used could be removed, or other
files could be specified instead).
rgds,
kh
Gerrit P. Haase wrote:
Angel Tsankov wrote:
I downloaded g++ from cygwin and installed it. I noticed that it
has built-in definitions of __stdcall, __cdecl and __fastcall.
I've come across other g++ builds for Windows that do not have
definitions for these identifiers, so I had to filter them out
from my source code with the help of macros. Now I need to know
how to distinguish this build of g++ from others in order to not
filter the above identifiers out.
Here's what I have now:
#if !(defined (_MSC_VER) || (defined (__GNUC__) && defined
(__WIN32__)))
#define __cdecl
#define __stdcall
#define __fastcall
#endif
gcc -dumpspecs:
*cpp:
%(cpp_cpu) %{posix:-D_POSIX_SOURCE} %{mno-win32:%{mno-cygwin:
%emno-cygwin and mno-win32 are not compatible}}
%{mno-cygwin:-D__MSVCRT__ -D__MINGW32__ %{!ansi:%{mthreads:-D_MT}}}
%{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__
%{!ansi:-Dunix} -D__unix__ -D__unix }
%{mwin32|mno-cygwin:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__
%{!ansi:-DWINNT}} %{!nostdinc:%{!mno-win32|mno-cygwin:-idirafter
../include/w32api%s -idirafter ../../include/w32api%s}}
For Cygwin (= -mno-win32 = default):
__CYGWIN32__
__CYGWIN__
__unix
__unix__
unix
For MinGW (= -mno-cygwin):
__MINGW32__
__MSVCRT__
WIN32
_WIN32
__WIN32
__WIN32__
For Cygwin (+ -mwin32):
__CYGWIN32__
__CYGWIN__
WIN32
_WIN32
__WIN32
__WIN32__
Gerrit
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