--- a/configure.in
+++ b/configure.in
@@ -21,7 +21,7 @@
 ### along with Octave; see the file COPYING.  If not, write to the Free
 ### Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 
-AC_REVISION($Revision: 1.89 $)
+AC_REVISION($Revision: 1.90 $)
 AC_PREREQ(2.0)
 AC_INIT(src/octave.cc)
 AC_CONFIG_HEADER(config.h kpathsea/c-auto.h)
@@ -570,7 +570,9 @@
   ;;
 esac
 
-AC_CHECK_FUNCS(erf erfc lgamma)
+### Check for nonstandard but common math functions that we need.
+
+AC_CHECK_FUNCS(acosh asinh atanh erf erfc lgamma)
 
 AC_MSG_CHECKING([for signgam declaration in math.h])
 AC_TRY_LINK([#include <math.h>],
@@ -581,54 +583,6 @@
 
 CFLAGS="$XCFLAGS"
 
-### Check for nonstandard but common trig functions that we need.
-### If they are missing, we replace them using functions from the BSD
-### math library, and we may need to replace some other functions too.
-
-AC_REPLACE_FUNCS(acosh asinh atanh)
-
-if test -n "$LIBOBJS"; then
-  for func in $LIBOBJS
-  do
-    case "$func" in
-      *acosh.o*)
-	AC_DEFINE(ACOSH_MISSING, 1)
-      ;;
-      *asinh.o*)
-	AC_DEFINE(ASINH_MISSING, 1)
-      ;;
-      *atanh.o*)
-	AC_DEFINE(ATANH_MISSING, 1)
-      ;;
-    esac
-  done
-  case $LIBOBJS in
-    *acosh.o* | *asinh.o*)
-      AC_REPLACE_FUNCS(copysign)
-    ;;
-  esac
-  case $LIBOBJS in
-    *acosh.o* | *asinh.o* | *atanh.o*)
-      AC_REPLACE_FUNCS(log1p)
-    ;;
-  esac
-  case $LIBOBJS in
-    *log1p*)
-      AC_REPLACE_FUNCS(log__L)
-    ;;
-  esac
-  case $LIBOBJS in
-    *log1p*)
-      AC_REPLACE_FUNCS(finite)
-    ;;
-  esac
-  case $LIBOBJS in
-    *copysign* | *finite* | *log1p*)
-      AC_REPLACE_FUNCS(logb scalb)
-    ;;
-  esac
-fi
-
 ### Checks for OS specific cruft.
 
 AC_STRUCT_TM