* m4/libtool.m4 (_LT_CONFIG_COMMANDS): Only call sed if
	necessary while quoting all libtool variables.

Index: m4/libtool.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/m4/libtool.m4,v
retrieving revision 1.177
diff -u -r1.177 libtool.m4
--- m4/libtool.m4	28 Mar 2005 09:32:59 -0000	1.177
+++ m4/libtool.m4	28 Mar 2005 16:00:34 -0000
@@ -462,12 +462,26 @@
 
 # Quote evaled strings.
 for var in lt_decl_all_varnames([[ ]], lt_decl_quote_varnames); do
-    eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"X\\\$\$var\\" | \\\$Xsed -e \\"\\\$sed_quote_subst\\"\\\`\\\\\\""
+    case \`eval \\\\\$ECHO "X\\\\\$\$var"\` in
+    *[[\\\\\\\`\\"\\\$]]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"X\\\$\$var\\" | \\\$Xsed -e \\"\\\$sed_quote_subst\\"\\\`\\\\\\""
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
 done
 
 # Double-quote double-evaled strings.
 for var in lt_decl_all_varnames([[ ]], lt_decl_dquote_varnames); do
-    eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"X\\\$\$var\\" | \\\$Xsed -e \\"\\\$double_quote_subst\\" -e \\"\\\$sed_quote_subst\\" -e \\"\\\$delay_variable_subst\\"\\\`\\\\\\""
+    case \`eval \\\\\$ECHO "X\\\\\$\$var"\` in
+    *[[\\\\\\\`\\"\\\$]]*)
+      eval "lt_\$var=\\\\\\"\\\`\\\$ECHO \\"X\\\$\$var\\" | \\\$Xsed -e \\"\\\$double_quote_subst\\" -e \\"\\\$sed_quote_subst\\" -e \\"\\\$delay_variable_subst\\"\\\`\\\\\\""
+      ;;
+    *)
+      eval "lt_\$var=\\\\\\"\\\$\$var\\\\\\""
+      ;;
+    esac
 done
 
 # Fix-up fallback echo if it was mangled by the above quoting rules.