ltmain.in: Fix --preserve-dup-deps stripping duplicates

Building INN with libtool otherwise failed with unresolved circular
dependencies, even with the use of --preserve-dup-deps.

diff --git a/build-aux/ltmain.in b/build-aux/ltmain.in
index 991228ae996c95e9d4da734178cef7982e0f2478..f850b95176a74adced6482d909fc7d7c5962c093 100644 (file)
--- a/build-aux/ltmain.in
+++ b/build-aux/ltmain.in
@@ -6730,42 +6730,47 @@ func_mode_link ()
          # Add libraries to $var in reverse order
          eval tmp_libs=\"\$$var\"
          new_libs=
+         # FIXME: Pedantically, this is the right thing to do, so
+         #        that some nasty dependency loop isn't accidentally
+         #        broken: new_libs="$deplib $new_libs"
          for deplib in $tmp_libs; do
-           # FIXME: Pedantically, this is the right thing to do, so
-           #        that some nasty dependency loop isn't accidentally
-           #        broken:
-           #new_libs="$deplib $new_libs"
-           # Pragmatically, this seems to cause very few problems in
-           # practice:
-           case $deplib in
-           -L*) new_libs="$deplib $new_libs" ;;
-           -R*) ;;
-           *)
-             # And here is the reason: when a library appears more
-             # than once as an explicit dependence of a library, or
-             # is implicitly linked in more than once by the
-             # compiler, it is considered special, and multiple
-             # occurrences thereof are not removed.  Compare this
-             # with having the same library being listed as a
-             # dependency of multiple other libraries: in this case,
-             # we know (pedantically, we assume) the library does not
-             # need to be listed more than once, so we keep only the
-             # last copy.  This is not always right, but it is rare
-             # enough that we require users that really mean to play
-             # such unportable linking tricks to link the library
-             # using -Wl,-lname, so that libtool does not consider it
-             # for duplicate removal.
-             case " $specialdeplibs " in
-             *" $deplib "*) new_libs="$deplib $new_libs" ;;
+           # Modification for INN in the loop (fix --preserve-dup-deps).
+           if $opt_preserve_dup_deps; then
+             new_libs="$deplib $new_libs"
+           else
+             # Pragmatically, this seems to cause very few problems in
+             # practice:
+             case $deplib in
+             -L*) new_libs="$deplib $new_libs" ;;
+             -R*) ;;
              *)
-               case " $new_libs " in
-               *" $deplib "*) ;;
-               *) new_libs="$deplib $new_libs" ;;
-               esac
-               ;;
+               # And here is the reason: when a library appears more
+               # than once as an explicit dependence of a library, or
+               # is implicitly linked in more than once by the
+               # compiler, it is considered special, and multiple
+               # occurrences thereof are not removed.  Compare this
+               # with having the same library being listed as a
+               # dependency of multiple other libraries: in this case,
+               # we know (pedantically, we assume) the library does not
+               # need to be listed more than once, so we keep only the
+               # last copy.  This is not always right, but it is rare
+               # enough that we require users that really mean to play
+               # such unportable linking tricks to link the library
+               # using -Wl,-lname, so that libtool does not consider it
+               # for duplicate removal.  And if not possible for portability
+               # reasons, then --preserve-dup-deps should be used.
+               case " $specialdeplibs " in
+               *" $deplib "*) new_libs="$deplib $new_libs" ;;
+               *)
+                 case " $new_libs " in
+                 *" $deplib "*) ;;
+                 *) new_libs="$deplib $new_libs" ;;
+                 esac
+                 ;;
+               esac
+               ;;
              esac
-             ;;
-           esac
+           fi
          done
          tmp_libs=
          for deplib in $new_libs; do