release script: Make autoconf run more robust.

scripts/release/get-package-and-version.shinc

@@ -44,9 +44,6 @@
 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 # meant to be included in shell scripts
-package=$(${AUTOCONF-autoconf} -f '--trace=AC_INIT:$1#$2')
-version=${package#*#}
-package=${package%#*}
 hostname=${hostname-$(hostname)}
 if [[ -x "scripts/reconfigure-${hostname}" ]]; then
   reconfCmd="scripts/reconfigure-${hostname}"
@@ -54,6 +51,12 @@ else
   # let's hope everything's correctly setup
   reconfCmd=scripts/reconfigure
 fi
+if [[ ! -f m4/ltversion.m4 ]]; then
+  $reconfCmd >/dev/null 2>&1
+fi
+package=$(${AUTOCONF-autoconf} -f '--trace=AC_INIT:$1#$2')
+version=${package#*#}
+package=${package%#*}
 log_dir=${log_dir-"${package}-${version}-release-logs"}
 mkdir -p "$log_dir"