ltmain.in: Fix reordering --as-needed

Libtool was reordering flags like, --as-needed, which broke its usage,
since the relevant libraries were no longer following the flag.

Reported: https://savannah.gnu.org/support/?111213

* build-aux/ltmain.in: Add check for --as-needed and --no-as-needed
  flags.

build-aux/ltmain.in

diff --git a/build-aux/ltmain.in b/build-aux/ltmain.in
index 1417745..294ed43 100644
--- a/build-aux/ltmain.in
+++ b/build-aux/ltmain.in
@@ -5580,6 +5580,11 @@
 	arg=$func_stripname_result
 	;;
 
+	-Wl,--as-needed|-Wl,--no-as-needed)
+	deplibs="$deplibs $arg"
+	continue
+	;;
+
       -Wl,*)
 	func_stripname '-Wl,' '' "$arg"
 	args=$func_stripname_result
@@ -6008,6 +6013,15 @@
 	lib=
 	found=false
 	case $deplib in
+	-Wl,--as-needed|-Wl,--no-as-needed)
+	   if test prog,link = "$linkmode,$pass"; then
+         compile_deplibs="$deplib $compile_deplibs"
+         finalize_deplibs="$deplib $finalize_deplibs"
+       else
+         deplibs="$deplib $deplibs"
+       fi
+       continue
+       ;;
 	-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe \
         |-threads|-fopenmp|-fopenmp=*|-openmp|-mp|-xopenmp|-omp|-qsmp=*)
 	  if test prog,link = "$linkmode,$pass"; then