Link with --as-needed, -z,defs and -O1

Index: gucharmap-2.30.1/ltmain.sh
===================================================================
--- gucharmap-2.30.1.orig/ltmain.sh	2010-04-27 19:59:34.161231676 +0200
+++ gucharmap-2.30.1/ltmain.sh	2010-04-27 19:59:30.065237945 +0200
@@ -4188,6 +4188,11 @@
 	func_stripname ' ' '' "$arg"
 	arg=$func_stripname_result
 	;;
+        
+       -Wl,--as-needed)
+        deplibs="$deplibs $arg"
+        continue
+        ;;
 
       -Wl,*)
 	func_stripname '-Wl,' '' "$arg"
@@ -4543,6 +4548,15 @@
 	lib=
 	found=no
 	case $deplib in
+        -Wl,--as-needed)
+          if test "$linkmode,$pass" = "prog,link"; then
+            compile_deplibs="$deplib $compile_deplibs"
+            finalize_deplibs="$deplib $finalize_deplibs"
+          else
+            deplibs="$deplib $deplibs"
+          fi
+          continue
+          ;;
 	-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe|-threads)
 	  if test "$linkmode,$pass" = "prog,link"; then
 	    compile_deplibs="$deplib $compile_deplibs"