diff --git a/config/lam_check_optflags.m4 b/config/lam_check_optflags.m4
new file mode 100644
index 0000000000..37b7943a8b
--- /dev/null
+++ b/config/lam_check_optflags.m4
@@ -0,0 +1,66 @@
+dnl -*- shell-script -*-
+dnl
+dnl $HEADER$
+dnl
+dnl $Id: lam_check_optflags.m4,v 1.1 2004/01/07 07:41:42 jsquyres Exp $
+dnl
+
+AC_DEFUN(LAM_CHECK_OPTFLAGS,[
+
+# Modularize this setup so that sub-configure.in scripts can use this
+# same setup code.
+
+##################################
+# Optimization flags
+##################################
+
+# If the user did not specify optimization flags, add some (the value
+# from $OPTFLAGS)
+
+co_arg="$1"
+co_found=0
+for co_word in $co_arg; do
+    case $co_word in
+    -g)    co_found=1 ;;
+    +K0)   co_found=1 ;;
+    +K1)   co_found=1 ;;
+    +K2)   co_found=1 ;;
+    +K3)   co_found=1 ;;
+    +K4)   co_found=1 ;;
+    +K5)   co_found=1 ;;
+    -O)    co_found=1 ;;
+    -O0)   co_found=1 ;;
+    -O1)   co_found=1 ;;
+    -O2)   co_found=1 ;;
+    -O3)   co_found=1 ;;
+    -O4)   co_found=1 ;;
+    -O5)   co_found=1 ;; 
+    -O6)   co_found=1 ;;
+    -O7)   co_found=1 ;;
+    -O8)   co_found=1 ;;
+    -O9)   co_found=1 ;;
+    -xO)   co_found=1 ;;
+    -xO0)  co_found=1 ;;
+    -xO1)  co_found=1 ;;
+    -xO2)  co_found=1 ;;
+    -xO3)  co_found=1 ;;
+    -xO4)  co_found=1 ;;
+    -xO5)  co_found=1 ;; 
+    -xO6)  co_found=1 ;;
+    -xO7)  co_found=1 ;;
+    -xO8)  co_found=1 ;;
+    -xO9)  co_found=1 ;;
+    -fast) co_found=1 ;;
+    esac
+done
+
+if test "$co_found" = "0"; then
+    co_result="$OPTFLAGS $co_arg"
+else
+    co_result="$co_arg"
+fi
+
+# Clean up
+
+unset co_found co_word co_arg
+])