php5 and libtool 2.2 cause some PHP related packages to FTBFS

Binary package hint: php5

php5 and libtool 2.2 cause some PHP related packages to FTBFS.

php-imap, for instance:
cd build-php5 && ./configure --build=i486-linux-gnu --host=i486-linux-gnu \
                --prefix=/usr \
                --with-php-config=/usr/bin/php-config5 \
                --disable-rpath \
                --disable-static \
                --with-imap=shared,/usr \
                --with-kerberos=/usr \
                --with-imap-ssl PHP_OPENSSL="yes"
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
./configure: line 1850: LT_AC_PROG_SED: command not found
checking for i486-linux-gnu-gcc... i486-linux-gnu-gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether i486-linux-gnu-gcc accepts -g... yes
checking for i486-linux-gnu-gcc option to accept ISO C89... none needed
checking whether i486-linux-gnu-gcc and cc understand -c and -o together... yes
checking for system library directory... lib
checking if compiler supports -R... no
checking if compiler supports -Wl,-rpath,... yes
checking build system type... i486-pc-linux-gnu
checking host system type... i486-pc-linux-gnu
checking target system type... i486-pc-linux-gnu
./configure: line 3347: s/.*>//: No such file or directory
checking for PHP prefix... /usr
checking for PHP includes... -I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend -I/usr/include/php5/ext -I/usr/include/php5/ext/date/lib -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
checking for PHP extension directory... /usr/lib/php5/20060613+lfs
checking for PHP installed headers prefix... /usr/include/php5
checking for re2c... no
configure: WARNING: You will need re2c 0.12.0 or later if you want to regenerate PHP parsers.
checking for gawk... no
checking for nawk... nawk
checking if nawk is broken... no
checking for IMAP support... ./configure: line 3586: s/^shared,//: No such file or directory
yes, shared
checking for IMAP Kerberos support... /usr
checking for IMAP SSL support... yes
checking how to run the C preprocessor... i486-linux-gnu-gcc -E
checking for utf8_mime2text signature... new
checking for U8T_CANONICAL... yes
checking for pam_start in -lpam... yes
checking for crypt in -lcrypt... yes
./configure: line 4937: s/[^a-zA-Z0-9]/_/g: No such file or directory
checking for krb5-config... /usr/bin/krb5-config
checking for pkg-config... no
checking for OpenSSL version... >= 0.9.6
checking for CRYPTO_free in -lcrypto... yes
checking for SSL_CTX_set_ssl_version in -lssl... yes
checking whether build with IMAP works... yes
./configure: line 6401: AC_PROG_LIBTOOL: command not found
configure: creating ./config.status
config.status: error: cannot find input file: config.h.in
make: *** [configure-php5-stamp] Error 1
dpkg-buildpackage: failure: debian/rules build gave error exit status 2