Bug#626869: gcc-4.6: undefined reference to `_q_add' with -mabi=ieeelongdouble

[Vincent Lefevre <vincent@vinc17.net>]

Package: gcc-4.6
Version: 4.6.0-2
Severity: normal

I get the following error:

ay:~> gcc-4.4 tst.c -o tst -mabi=ieeelongdouble
cc1: warning: Using IEEE extended precision long double
/tmp/cceTQS0o.o: In function `main':
tst.c:(.text+0x84): undefined reference to `_q_add'
collect2: ld returned 1 exit status
zsh: exit 1     gcc-4.4 tst.c -o tst -mabi=ieeelongdouble

tst.c is:

int main (void)
{
  volatile long double x = 1, y;
  y = x + x;
  return 0;
}

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (900, 'testing'), (900, 'stable'), (500, 'oldstable'), (200, 'unstable')
Architecture: powerpc (ppc)

Kernel: Linux 2.6.26-1-powerpc
Locale: LANG=POSIX, LC_CTYPE=en_US.ISO8859-1 (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash

Versions of packages gcc-4.6 depends on:
ii  binutils               2.21.0.20110327-3 The GNU assembler, linker and bina
ii  cpp-4.6                4.6.0-2           The GNU C preprocessor
ii  gcc-4.6-base           4.6.0-2           The GNU Compiler Collection (base 
ii  libc6                  2.11.2-7          Embedded GNU C Library: Shared lib
ii  libcloog-ppl0          0.15.9-3          the Chunky Loop Generator (runtime
ii  libgcc1                1:4.6.0-2         GCC support library
ii  libgmp10               2:5.0.1+dfsg-7    Multiprecision arithmetic library
ii  libgmpxx4ldbl          2:5.0.1+dfsg-7    Multiprecision arithmetic library 
ii  libgomp1               4.6.0-2           GCC OpenMP (GOMP) support library
ii  libmpc2                0.9-3             multiple precision complex floatin
ii  libmpfr4               3.0.0-9           multiple precision floating-point 
ii  libppl-c4              0.11.2-3          Parma Polyhedra Library (C interfa
ii  libppl9                0.11.2-3          Parma Polyhedra Library (runtime l
ii  zlib1g                 1:1.2.3.4.dfsg-3  compression library - runtime

Versions of packages gcc-4.6 recommends:
ii  libc6-dev                     2.11.2-7   Embedded GNU C Library: Developmen

Versions of packages gcc-4.6 suggests:
pn  binutils-gold                 <none>     (no description available)
pn  gcc-4.6-doc                   <none>     (no description available)
pn  gcc-4.6-locales               <none>     (no description available)
pn  gcc-4.6-multilib              <none>     (no description available)
pn  libgcc1-dbg                   <none>     (no description available)
pn  libgomp1-dbg                  <none>     (no description available)
pn  libmudflap0-4.6-dev           <none>     (no description available)
pn  libmudflap0-dbg               <none>     (no description available)
pn  libquadmath-dbg               <none>     (no description available)

-- no debconf information