without gobject-introspection installed, autogen.sh fails with the following output:

# ./autogen.sh 
*** WARNING: I am going to run 'configure' with no arguments.
*** If you wish to pass any to it, please specify them on the
*** './autogen.sh' command line.

autoreconf-2.69: Entering directory `.'
autoreconf-2.69: configure.ac: not using Gettext
autoreconf-2.69: running: aclocal --force -I m4 ${ACLOCAL_FLAGS}
autoreconf-2.69: configure.ac: tracing
autoreconf-2.69: configure.ac: creating directory build-aux
autoreconf-2.69: running: libtoolize --copy --force
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'build-aux'.
libtoolize: copying file 'build-aux/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
autoreconf-2.69: running: /usr/bin/autoconf-2.69 --force
autoreconf-2.69: configure.ac: not using Autoheader
autoreconf-2.69: running: automake --add-missing --copy --force-missing
configure.ac:18: installing 'build-aux/ar-lib'
configure.ac:18: installing 'build-aux/compile'
configure.ac:20: installing 'build-aux/config.guess'
configure.ac:20: installing 'build-aux/config.sub'
configure.ac:12: installing 'build-aux/install-sh'
configure.ac:12: installing 'build-aux/missing'
Makefile.am:38: error: HAVE_INTROSPECTION does not appear in AM_CONDITIONAL
Makefile.am:135: error: HAVE_INTROSPECTION does not appear in AM_CONDITIONAL
Makefile.am: installing 'build-aux/depcomp'
parallel-tests: installing 'build-aux/test-driver'
autoreconf-2.69: automake failed with exit status: 1