tvtime FTBFS because of old version of libtool

tvtime FTBFS in saucy because of old version of libtool:

../libtool: line 694: X--tag=CXX: command not found
../libtool: line 727: libtool: ignoring unknown tag : command not found
../libtool: line 694: X--mode=link: command not found
../libtool: line 844: *** Warning: inferring the mode of operation is deprecated.: command not found
../libtool: line 845: *** Future versions of Libtool will require -mode=MODE be specified.: command not found
x86_64-linux-gnu-gcc: fatal error: no input files
compilation terminated.
x86_64-linux-gnu-gcc: fatal error: no input files
compilation terminated.
x86_64-linux-gnu-gcc: fatal error: no input files
compilation terminated.
x86_64-linux-gnu-gcc: fatal error: no input files
compilation terminated.
../libtool: line 1998: X-g: command not found
../libtool: line 1998: X-O2: command not found
../libtool: line 1749: X-L/usr/lib/x86_64-linux-gnu: No such file or directory
../libtool: line 2162: Xtvtime: command not found
../libtool: line 2167: X: command not found
../libtool: line 2174: Xtvtime: command not found
../libtool: line 2182: mkdir /.libs: No such file or directory
mkdir: cannot create directory '/.libs': Permission denied
make[3]: *** [tvtime] Error 1
make[3]: Leaving directory `/build/buildd/tvtime-1.0.2/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/build/buildd/tvtime-1.0.2'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/build/buildd/tvtime-1.0.2'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2

see buildlog: https://launchpadlibrarian.net/148287063/buildlog_ubuntu-saucy-amd64.tvtime_1.0.2-0~39~saucy1_FAILEDTOBUILD.txt.gz