g++ 'cmath' bug ?

g++ 'cmath' bug ?

[Gert Vandelaer]

Hy all,

I have a major problem with my gcc-g++ compiler on my system (Linux, with Slackware gcc-3.3.2 package) here's what happens when trying to compile a simple c++ program.

root@lapdjeez:~# cat test.cpp 
#include <cmath>
#include <cstdio>

int main (int argc, char **argv)
{
        printf("Hello\n"); 
        return 0; 
}
root@lapdjeez:~# g++-gcc-3.2.2 test.cpp 
In file included from test.cpp:1:
/usr/include/c++/3.2.2/cmath:358: `modf' not declared
/usr/include/c++/3.2.2/cmath: In function `float std::modf(float, float*)':
/usr/include/c++/3.2.2/cmath:362: `::modff' undeclared (first use here)
/usr/include/c++/3.2.2/cmath: In function `long double std::modf(long double, 
   long double*)':
/usr/include/c++/3.2.2/cmath:376: `::modfl' undeclared (first use here)
root@lapdjeez:~# 

I also tried removing/installing newer/older versions of gcc-g++ ... 
even trying to build a new g++ compiler from source (gcc-3.3.2 and gcc-3.4.0) gives me similar "modf not declared" errors during the build process (via 'make bootstrap' or './configure && make' ..)

The C compiler works fine, and building a new C compiler also works, it's only c++ where there's problems.

Any pointers much appreciated,


bye,
Gert

Re: g++ 'cmath' bug ?

[Gert Vandelaer]

Hy,

thnx Dara for pointing out it might be something with my glibc ...
I rebuilt a new glibc (version 2.3.3 with prefix=/usr) and everything works fine now.

bye,
gert 
> 
> > Hello,
> > 
> > what version of glibc do you have installed? 2.2.5 at
> > a minimum is required and newer probably doesn't hurt.
> > It sounds like there's some kind of mismatch between
> > your libstdc++ and glibc.
> > 
> > Dara
> > 
> > 
> > 	
> > 		
> > __________________________________
> > Do you Yahoo!?
> > Yahoo! Movies - Buy advance tickets for 'Shrek 2'
> > http://movies.yahoo.com/showtimes/movie?mid=1808405861 
> > 
> 

Re: g++ 'cmath' bug ?

[Dara Hazeghi]

Hello,

what version of glibc do you have installed? 2.2.5 at
a minimum is required and newer probably doesn't hurt.
It sounds like there's some kind of mismatch between
your libstdc++ and glibc.

Dara


	
		
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