./configure: 12102: Syntax error: word unexpected (expecting ")") about bitlbee-facebook HOT 4 CLOSED

$ find / -name 'zlib' 2&>/dev/null
/basejail/usr/src/sys/modules/zlib

$ pkg info autoconf automake glib json-glib libtool bitlbee
autoconf-2.69
automake-1.15_1
glib-2.44.1_2
json-glib-1.0.4
libtool-2.4.6
bitlbee-3.4.1_4

$ bash ./autogen.sh 
--------8<--------
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
checking whether make supports nested variables... (cached) yes
checking for cc option to accept ISO C99... none needed
./configure: 12102: Syntax error: word unexpected (expecting ")")

$ cat -n configure | sed -n '12095,12115p'
 12095  # Check whether --with-plugindir was given.
 12096  if test "${with_plugindir+set}" = set; then :
 12097    withval=$with_plugindir; plugindir="$with_plugindir"
 12098
 12099  fi
 12100
 12101
 12102  PKG_CHECK_MODULES(BITLBEE, bitlbee >= 3.4)
 12103  PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.32.0 gobject-2.0)
 12104  PKG_CHECK_MODULES(JSON, json-glib-1.0 >= 0.14.0)
 12105  PKG_CHECK_MODULES(ZLIB, zlib)
 12106
 12107
 12108       if test -z "$GLIB_GENMARSHAL"; then :
 12109    GLIB_GENMARSHAL=`$PKG_CONFIG --variable="glib_genmarshal" "glib-2.0"`
 12110  fi
 12111       if test -n "$GLIB_GENMARSHAL"; then :
 12112
 12113  fi
 12114
 12115  if test -z "$GLIB_GENMARSHAL"; then :

$ bash ./configure
--------8<--------
checking for cc option to accept ISO C99... none needed
./configure: line 12102: syntax error near unexpected token `BITLBEE,'
./configure: line 12102: `PKG_CHECK_MODULES(BITLBEE, bitlbee >= 3.4)'