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Message-ID: <3D607140.6020805@ims.u-tokyo.ac.jp>
Date: Mon, 19 Aug 2002 13:17:04 +0900
From: Michiel Jan Laurens de Hoon <mdehoon AT ims DOT u-tokyo DOT ac DOT jp>
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To: cygwin AT cygwin DOT com
Subject: g++ -mno-cygwin header problems, new.h ?
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I am trying to use #include <vector> with g++ -mno-cygwin. My test 
program is

$ cat test.c
#include <vector>

int main()
{ return 0;
}

which compiles fine with g++ without -mno-cygwin.
To try the same with -mno-cygwin, I copied the c++ include files from 
c:\cygwin\usr\include\g++-3 to c:\cygwin\usr\include\mingw\g++-3 (as 
described in 
http://www.colomsat.net.co/freehost/ngiraldo/cppcygwin.html), and try to 
compile again with -mno-cygwin. Now I get lots of errors:

$ g++ -mno-cygwin test.c
In file included from /usr/local/include/g++-v3/backward/new.h:33,
                 from /usr/include/mingw/g++-3/stl_algobase.h:52,
                 from /usr/include/mingw/g++-3/vector:30,
                 from test.c:1:
/usr/local/include/g++-v3/backward/backward_warning.h:32:2: warning: 
#warning This file includes at least one deprecated or antiquated 
header. Please consider using one of the 32 headers found in section 
17.4.1.2 of the C++ standard. Examples include substituting the <X> 
header for the <X.h> header for C++ includes, or <sstream> instead of 
the deprecated header <strstream.h>. To disable this warning use 
-Wno-deprecated.
In file included from /usr/local/include/g++-v3/backward/new.h:34,
                 from /usr/include/mingw/g++-3/stl_algobase.h:52,
                 from /usr/include/mingw/g++-3/vector:30,
                 from test.c:1:
/usr/local/include/g++-v3/new:79: `size_t' undeclared in namespace `std'
/usr/local/include/g++-v3/new:79: declaration of `operator new' as 
non-function
/usr/local/include/g++-v3/new:79: invalid declarator
/usr/local/include/g++-v3/new:80: `size_t' undeclared in namespace `std'
/usr/local/include/g++-v3/new:80: declaration of `operator new []' as

... and many more.
I guess the problem starts when new.h is included, which is not a mingw 
include file.
I get the same error if I try to use the c++ include files that come 
with the mingw distribution (using -I /mingw/include/g++-3, where /mingw 
is where I installed mingw). I am not sure why I get the deprecated 
warning, as I am using #include <vector>, not #include <vector.h>.

Does anybody know what is the correct way to include the c++ header 
files with -mno-cygwin?

Thanks in advance,

Michiel de Hoon
University of Tokyo, Human Genome Center.





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