Date: Sat, 14 Oct 2006 18:27:58 GMT From: Wes Peters<wes@softweyr.com> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/104425: c++ vs. fesetenv: undefined reference to __test_sse() Message-ID: <200610141827.k9EIRwde021787@www.freebsd.org> Resent-Message-ID: <200610141830.k9EIULCi097285@freefall.freebsd.org>
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>Number: 104425
>Category: bin
>Synopsis: c++ vs. fesetenv: undefined reference to __test_sse()
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Oct 14 18:30:19 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Wes Peters
>Release: 6.2-PRERELEASE
>Organization:
FreeBSD
>Environment:
FreeBSD zaphod.softweyr.com 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #4: Thu Oct 12 08:51:53 PDT 2006 rootb@zaphod.softweyr.com:/usr/obj/usr/src/sys/ZAPHOD i386
>Description:
wes@zaphod$ cat hello.cc
#include <iostream>
#include <fenv.h>
using namespace std;
int main(int argc, char *argv[])
{
fenv_t envp;
int i = fegetenv(&envp);
fesetenv(&envp);
cout << "Hello, world" << endl;
}
wes@zaphod$ c++ -g hello.cc -lm
/var/tmp//ccgJGfUg.o(.text+0x1b6): In function `fesetenv':
/usr/include/fenv.h:211: undefined reference to `__test_sse()'
The problem seems to lie in the C++ runtime startup, the nearly identical C program has no problems:
wes@zaphod$ cat hello.c
#include <stdio.h>
#include <fenv.h>
#pragma STDC FENV_ACCESS ON
int main(int argc, char *argv[])
{
fenv_t envp;
int i = fegetenv(&envp);
fesetenv(&envp);
printf("Hello, world\n");
}
wes@zaphod$ cc -g hello.c -lm
wes@zaphod$ ./a.out
Hello, world
>How-To-Repeat:
Attempt to compile any C++ program that calls fesetenv.
>Fix:
Still working on it. This may be a show-stopper for release, if we care about C++ and floating-point support.
>Release-Note:
>Audit-Trail:
>Unformatted:
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