diff -up pygobject-3.0.0/configure.ac.lm pygobject-3.0.0/configure.ac
--- pygobject-3.0.0/configure.ac.lm 2011-09-28 08:30:20.922562047 -0400
+++ pygobject-3.0.0/configure.ac 2011-09-28 08:30:26.406607623 -0400
@@ -154,6 +154,11 @@ AM_PATH_GLIB_2_0(glib_required_version,,
if test -n "$export_dynamic"; then
GLIB_LIBS=`echo $GLIB_LIBS | sed -e "s/$export_dynamic//"`
fi
+
+AC_CHECK_LIBM
+AC_SUBST(LIBM)
+GLIB_LIBS="$GLIB_LIBS $LIBM"
+
PYTHON_BASENAME=`basename $PYTHON`
AC_SUBST([PYTHON_BASENAME])