>Number:         25930
>Category:       lib
>Synopsis:       isnan missing
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jun 14 21:54:00 UTC 2004
>Closed-Date:
>Last-Modified:
>Originator:     Dan McMahill
>Release:        NetBSD 2.0_BETA
>Organization:
	
>Environment:
	
	
System: NetBSD ftp.netbsd.org 2.0_BETA NetBSD 2.0_BETA (NBFTP) #4: Fri Apr 16 22:40:25 EDT 2004 tls@enola-gay:/usr/src/sys/arch/i386/compile/NBFTP i386
Architecture: i386
Machine: i386
>Description:

isnan and isinf don't seem to work right in c++ programs.  I always get:

foo.cpp: In function `int main(int, char**)':
foo.cpp:8: error: `isnan' undeclared (first use this function)
foo.cpp:8: error: (Each undeclared identifier is reported only once for each
   function it appears in.)

Something in /usr/include/g++/cmath seems to trigger this.

	
>How-To-Repeat:

cat > foo.cpp << EOF
#include <iostream>
#include <cmath>

int main(int argc, char **argv)
{
        double x=2.3;

        std::cout << "isnan(" << x << ") = " << isnan(x) << std::endl;

        return 0;
}

EOF

g++ -Wall -o foo foo.cpp


	
>Fix:

	
>Release-Note:
>Audit-Trail:
>Unformatted: