BDR conpilation error un Ubuntu 12.4 LTS

Hi all, I have followed the wiki about postgresql BDR:

OS: Ubuntu 12.04.5 LTS

- git clone git://git.postgresql.org/git/2ndquadrant_bdr.git
- cd 2ndquadrant_bdr
- git checkout bdr/0.7.1
- ./configure --prefix=$HOME/bdr --with-openssl
- make
- make install

To install the BDR extension you'd then run:

- (cd contrib/btree_gist && make && make install)
- (cd contrib/bdr && make && make install)

or to instead install all contribs (useful to include widely used
extensions like hstore):

- (cd contrib && make all)
- (cd contrib && make install)

BUT during cd contrib/bdr && make I obtain the following error:

make -C ../../src/interfaces/libpq all
make[1]: Entering directory
`/usr/src/meteosmit/postgresql-BDR/2ndquadrant_bdr/src/interfaces/libpq'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory
`/usr/src/meteosmit/postgresql-BDR/2ndquadrant_bdr/src/interfaces/libpq'
sed '0,/BDR_VERSION_DATE/s,\(BDR_VERSION_DATE\).*,\1
"2014-12-22",;0,/BDR_VERSION_GITHASH/s,\(BDR_VERSION_GITHASH\).*,\1
"a63674e",' bdr_version.h.in >bdr_version.h
gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith
-Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute
-Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard
-fpic -I../../src/interfaces/libpq -I. -I. -I../../src/include
-D_GNU_SOURCE -c -o bdr.o bdr.c
bdr.c: In function ‘bdr_perdb_worker_main’:
bdr.c:1057:10: warning: ‘rc’ may be used uninitialized in this function
[-Wuninitialized]
gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith
-Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute
-Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard
-fpic -I../../src/interfaces/libpq -I. -I. -I../../src/include
-D_GNU_SOURCE -c -o bdr_apply.o bdr_apply.c
bdr_apply.c: In function ‘process_remote_commit’:
bdr_apply.c:286:2: error: invalid operands to binary >> (have ‘TimestampTz’
and ‘int’)
bdr_apply.c:355:3: error: invalid operands to binary >> (have ‘TimestampTz’
and ‘int’)
make: *** [bdr_apply.o] Error 1

Any help appreciated. Thanks.