--- a/configure.in
+++ b/configure.in
@@ -20,8 +20,8 @@
 ### along with Octave; see the file COPYING.  If not, write to the Free
 ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
-AC_REVISION($Revision: 1.179 $)
-AC_PREREQ(2.0)
+AC_REVISION($Revision: 1.180 $)
+AC_PREREQ(2.9)
 AC_INIT(src/octave.cc)
 AC_CONFIG_HEADER(config.h)
 
@@ -547,11 +547,11 @@
 elif $have_f2c; then
   AC_DEFINE(F77_APPEND_UNDERSCORE, 1)
   AC_MSG_RESULT([defining F77_APPEND_UNDERSCORE to be 1])
-  AC_CHECK_LIB(f2c, main, FLIBS=-lf2c, [], -lm)
+  AC_CHECK_LIB(f2c, s_stop, FLIBS=-lf2c, [], -lm)
   if test -z "$FLIBS"; then
-    AC_CHECK_LIB(I77, main, FLIBS=-lI77, [])
+    AC_CHECK_LIB(I77, f_open, FLIBS=-lI77, [])
     if test -n "$FLIBS"; then
-      AC_CHECK_LIB(F77, main, FLIBS="$FLIBS -lF77", [])
+      AC_CHECK_LIB(F77, s_stop, FLIBS="$FLIBS -lF77", [])
     fi
   fi
   if test -z "$FLIBS"; then
@@ -767,16 +767,16 @@
 ### are often available.  If they are missing, we try to replace them
 ### with functions from the BSD/NET2 math library.
 
-AC_CHECK_LIB(sunmath, main)
+AC_CHECK_LIB(sunmath, quiet_nan)
 
 dnl This is bogus.  We shouldn't have to explicitly add libc too!
 
 case "$canonical_host_type" in
   *-*-linux*)
-    AC_CHECK_LIB(m, main, , , -lc)
+    AC_CHECK_LIB(m, sin, , , -lc)
   ;;
   *)
-    AC_CHECK_LIB(m, main)
+    AC_CHECK_LIB(m, sin)
   ;;
 esac
 
@@ -811,7 +811,7 @@
 
 TERMLIBS=""
 for termlib in termcap terminfo curses termlib; do
-  AC_CHECK_LIB(${termlib}, main, [TERMLIBS="${TERMLIBS} -l${termlib}"])
+  AC_CHECK_LIB(${termlib}, tputs, [TERMLIBS="${TERMLIBS} -l${termlib}"])
   case "${TERMLIBS}" in
     *-l${termlib}*)
       AC_MSG_RESULT([defining TERMLIBS to be $TERMLIBS])