ac_libtoolize_cflags

Change the contents of variable COMPILER-FLAGS-VAR so that they are Libtool friendly, ie. prefix each of them with `-Xcompiler' so that Libtool doesn't remove them.

AC_DEFUN([AC_LIBTOOLIZE_CFLAGS],
  [ac_libtoolize_ldflags_temp=""
   for i in $$1
   do
     ac_libtoolize_ldflags_temp="$ac_libtoolize_ldflags_temp -Xcompiler $i"
   done
   $1="$ac_libtoolize_ldflags_temp"])dnl

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