octave from mercurial: make fails

[Kjetil brinchmann Halvorsen]

I am on Lubuntu 13.10

(all of this worked some few days ago)
Just made hg pull & hg update
./configure
make

stops with this message:

numeric/lo-mappers.cc:139:10: note: suggested alternatives:
In file included from /usr/include/features.h:371:0,
                 from /usr/include/stdint.h:25,
                 from /usr/lib/gcc/x86_64-linux-gnu/4.8/include/stdint.h:9,
                 from ../oct-conf-post.h:163,
                 from ../config.h:3337,
                 from numeric/lo-mappers.cc:25:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:103:1: note:   'frexp'
 __MATHCALL (frexp,, (_Mdouble_ __x, int *__exponent));
 ^
In file included from /usr/include/c++/4.8/complex:44:0,
                 from ./util/oct-cmplx.h:27,
                 from numeric/lo-mappers.h:29,
                 from numeric/lo-mappers.cc:32:
/usr/include/c++/4.8/cmath:331:5: note:   'std::frexp'
     frexp(_Tp __x, int* __exp)
     ^
numeric/lo-mappers.cc: In function 'float xlog2(float, int&)':
numeric/lo-mappers.cc:368:10: error: 'frexpf' is not a member of 'gnulib'
   return gnulib::frexpf (x, &exp);
          ^
numeric/lo-mappers.cc:368:10: note: suggested alternative:
In file included from ../libgnu/math.h:27:0,
                 from /usr/include/c++/4.8/cmath:44,
                 from /usr/include/c++/4.8/complex:44,
                 from ./util/oct-cmplx.h:27,
                 from numeric/lo-mappers.h:29,
                 from numeric/lo-mappers.cc:32:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:103:1: note:   'frexpf'
 __MATHCALL (frexp,, (_Mdouble_ __x, int *__exponent));
 ^
numeric/lo-mappers.cc: In function 'double xlog2(double, int&)':
numeric/lo-mappers.cc:140:1: warning: control reaches end of non-void
function [-Wreturn-type]
 }
 ^
numeric/lo-mappers.cc: In function 'float xlog2(float, int&)':
numeric/lo-mappers.cc:369:1: warning: control reaches end of non-void
function [-Wreturn-type]
 }
 ^
make[4]: *** [numeric/numeric_libnumeric_la-lo-mappers.lo] Error 1
make[4]: Leaving directory `/home/kjetil/gnuoctave/octave/liboctave'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/kjetil/gnuoctave/octave/liboctave'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/kjetil/gnuoctave/octave/liboctave'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/kjetil/gnuoctave/octave'
make: *** [all] Error 2
address@hidden:~/gnuoctave/octave$

kjetil