copysignl on alpha/linux?

[Benjamin Kosnik]

copysignl seems to be missing from /usr/lib/libm.a or /usr/lib/libc.a
on alpha-linux boxes (say castro.cygnus.com). This is giving me errors
when I try to link v-3 as a shared library on alpha, I get:


% g++ -g filebuf.cc 
/castro/street/bkoz/H-alpha-gcc-3/lib/gcc-lib/alphaev6-unknown-linux-gnu/2.96/../../../libstdc++.so: undefined reference to `copysignl'
collect2: ld returned 1 exit status


Is this an issue with the alpha C libraries? Note that x86-linux boxes
seem to have this symbol.

-Benjamin