> -----Original Message-----
> From: Brandon
> Sent: Wednesday, 4 June 2008 2:15 a.m.
> To: [EMAIL PROTECTED]
> Subject: Bug#484299: Can not use powf and sinf in the same project.
>
>
> Package: mingw32-runtime
> Version: 3.13-1
> Severity: normal
>
> A project which attempts to use both powf and sinf will fail to link
> with mingw. It links fine with gcc, assuming that the math library is
> linked in with -lm. Here is sample code which will fail:
>
> --- Begin sample code ---
> #include <cmath>
>
> int main(int argc, char ** argv)
> {
> float x = 2.0f, y = 3.0f, z;
>
> z = powf(x, y);
> x = sinf(z);
> return 0;
> }
> --- End ---
>
> The error message is:
> /usr/lib/gcc/i586-mingw32msvc/4.2.1-sjlj/libstdc++.a(stubs.o):
> (.text+0x160):
> multiple definition of
> `_powf' /tmp/ccgqbZdX.o:tmp.cpp:(.text$powf[_powf]+0x0): first defined
> here collect2: ld returned 1 exit status
>
> If you comment out either z = powf..., or x = sinf..., this program
> will build just fine. As a side note, I think it has taken me
> more than
> a day to diagnose this bug. It's been a big PITA.
>
> -Brandon
This is a cross-compile bug in libstdc++. math/stubs.o should be empty. Please
file a bug
report with gcc bugzilla.
Danny
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