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Re: 3.3 problem: <ctype.h> and <iostream>

On Wednesday, January 22, 2003, at 04:34 PM, Craig Rodrigues wrote:
Hi,

I just did a contrib/gcc_update in my CVS tree on the 3.3 branch
and am now encountering a new problem.

If I have the following file:

#include <ctype.h>
#include <iostream>
#include <ios>

int main(int argc, char *argv[])
{
}


Compiling it yields the following error on RedHat Linux 7.2 system:

======================================================================= ============
In file included from /u0/test/gcc-3.3-cvs/test/include/c++/3.3/ios:48,
from /u0/test/gcc-3.3-cvs/test/include/c++/3.3/ostream:45,
from /u0/test/gcc-3.3-cvs/test/include/c++/3.3/iostream:45,
from a.cc:2:
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:58:34: macro "isspace" pas
sed 2 arguments, but takes just 1
In file included from /u0/test/gcc-3.3-cvs/test/include/c++/3.3/ios:48,
from /u0/test/gcc-3.3-cvs/test/include/c++/3.3/ostream:45,
from /u0/test/gcc-3.3-cvs/test/include/c++/3.3/iostream:45,
from a.cc:2:
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:58: error: `
std::isspace' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:58: error: template
declaration of `bool std::isspace'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:62:34: macro "isprint" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:62: error: `
std::isprint' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:62: error: template
declaration of `bool std::isprint'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:66:34: macro "iscntrl" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:66: error: `
std::iscntrl' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:66: error: template
declaration of `bool std::iscntrl'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:70:34: macro "isupper" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:70: error: `
std::isupper' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:70: error: template
declaration of `bool std::isupper'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:74:34: macro "islower" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:74: error: `
std::islower' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:74: error: template
declaration of `bool std::islower'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:78:34: macro "isalpha" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:78: error: `
std::isalpha' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:78: error: template
declaration of `bool std::isalpha'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:82:34: macro "isdigit" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:82: error: `
std::isdigit' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:82: error: template
declaration of `bool std::isdigit'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:86:34: macro "ispunct" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:86: error: `
std::ispunct' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:86: error: template
declaration of `bool std::ispunct'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:90:35: macro "isxdigit" pa
ssed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:90: error: `
std::isxdigit' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:90: error: template
declaration of `bool std::isxdigit'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:94:34: macro "isalnum" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:94: error: `
std::isalnum' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:94: error: template
declaration of `bool std::isalnum'
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:98:34: macro "isgraph" pas
sed 2 arguments, but takes just 1
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:98: error: `
std::isgraph' declared as an `inline' variable
/u0/test/gcc-3.3-cvs/test/include/c++/3.3/bits/localefwd.h:98: error: template
declaration of `bool std::isgraph'
======================================================================= ============


If I change the order of the includes to:

#include <iostream>
#include <ios>
#include <ctype.h>

Then the error goes away.

What's going on here?
Looks pretty clear.  You're picking up a version of <ctype.h> that's
appropriate for C, instead of one that's appropriate for C++.  The C
version of <ctype.h> declares a whole bunch of macros, and the
C++ version shouldn't.  In a C++ compilation you should either get
a completely different header, or else a header that's conditionalized
on #ifdef __cplusplus.  Somehow the machinery to do that broke.

			--Matt
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