Fix libtqtrla FTBFS on newer Debian and Ubuntu versions

lib/libtqtrla/configure.in.in

@@ -13,3 +13,18 @@ lt_age="0"
 AC_SUBST(lt_current)
 AC_SUBST(lt_revision)
 AC_SUBST(lt_age)
+
+dnl this package requires heimdal Kerberos to compile
+KDE_FIND_PATH(pkg-config, PKGCONFIG, [${prefix}/bin ${exec_prefix}/bin /usr/bin /usr/local/bin /opt/local/bin], [AC_MSG_WARN([Could not find pkg-config ])
+])
+
+if test -n "$PKGCONFIG"; then
+  vers=`$PKGCONFIG krb5 --modversion 2>/dev/null | sed -e 's/libkrb5 //' | awk 'BEGIN { FS = "."; } { printf "%d", ($1 * 1000 + $2) * 1000 + $3;}'`
+  if test -n "$vers" && test "$vers" -ge 1000000
+  then
+     KRB5_CFLAGS="`$PKGCONFIG krb5 --cflags`"
+     CPPFLAGS="$CPPFLAGS $KRB5_CFLAGS"
+  else
+     AC_CHECK_HEADER(kadm5/admin.h)
+  fi
+fi