diff -Nru pkg-create-dbgsym-0.42/debian/changelog pkg-create-dbgsym-0.43/debian/changelog
--- pkg-create-dbgsym-0.42/debian/changelog	2010-04-22 09:36:38.000000000 +0100
+++ pkg-create-dbgsym-0.43/debian/changelog	2010-04-26 13:00:42.000000000 +0100
@@ -1,3 +1,12 @@
+pkg-create-dbgsym (0.43) lucid-proposed; urgency=low
+
+  * pkg_create_dbgsym: Do not check debian/files for whether we already
+    processed a .ddeb, since Launchpad Soyuz disables dpkg-distaddfile for
+    ddebs still. Instead, skip the run if we do not find any unstripped binary
+    in the current package. (LP: #562418)
+
+ -- Martin Pitt <martin.pitt@ubuntu.com>  Mon, 26 Apr 2010 14:00:38 +0200
+
 pkg-create-dbgsym (0.42) lucid; urgency=low
 
   * Add tests/dhtest.doublestrip/: Call dh_strip twice, to check whether this
diff -Nru pkg-create-dbgsym-0.42/pkg_create_dbgsym pkg-create-dbgsym-0.43/pkg_create_dbgsym
--- pkg-create-dbgsym-0.42/pkg_create_dbgsym	2010-04-22 09:26:07.000000000 +0100
+++ pkg-create-dbgsym-0.43/pkg_create_dbgsym	2010-04-26 12:54:31.000000000 +0100
@@ -60,16 +60,15 @@
 dp="debian/${pkgname}-dbgsym" # debug package path
 dp=`readlink -f "$dp"` # debug package path
 
-if grep -q "^$pkgname-dbgsym_.*\.ddeb" debian/files; then
-    echo "ddeb for $pkgname already exists, ignoring" >&2
-    exit 0
-fi
-
 # find all ELF files and extract their debug symbols; also add debug links
-# to original files
+# to original files; if we do not find any unstripped files, then a likely
+# cause is that we already ran this program on the current package, in which
+# case we must not run it again to not destroy debug link CRC sums and produce
+# empty ddebs
+unset any_unstripped
 origdir=`pwd`
 cd $p
-find -type f | while read f; do
+find -type f | ( while read f; do
     # ignore static libraries
     if echo "$f" | grep -q '\.[ao]$'; then continue; fi
     # ignore non-ELF files
@@ -78,6 +77,11 @@
     if [ -n "$blacklist" ]; then
         if echo "$f" | fgrep -q "$blacklist"; then continue; fi
     fi
+    if ! readelf -S "$f" | grep -q ' .debug_'; then
+	# no debug information
+	continue
+    fi
+    any_unstripped=1
 
     mkdir -p $dp/usr/lib/debug/`dirname "$f"`
     objcopy --only-keep-debug "$f" "$dp/usr/lib/debug/$f" || {
@@ -89,6 +93,12 @@
 	exit 1
     }
 done
+if [ -z "$any_unstripped" ]; then
+    echo "$pkgname is already stripped, ignoring" >&2
+    rm -rf $dp
+    exit 0
+fi
+)
 cd $origdir
 
 if [ ! -d "$dp" ] || [ -z "`find $dp -type f`" ]; then