diff -r fa3a18f9abcf -r cc9b84a83b34 scripts/build/libc/glibc.sh
--- a/scripts/build/libc/glibc.sh	Sun May 29 19:24:41 2011 +0200
+++ b/scripts/build/libc/glibc.sh	Mon May 30 23:05:28 2011 +0200
@@ -27,12 +27,19 @@
 
     # C library addons
     for addon in "${addons_list[@]}"; do
-        # NPTL addon is not to be downloaded, in any case
-        [ "${addon}" = "nptl" ] && continue || true
-        CT_GetFile "glibc-${addon}-${CT_LIBC_VERSION}"      \
-                   {ftp,http}://ftp.gnu.org/gnu/glibc       \
-                   ftp://gcc.gnu.org/pub/glibc/releases     \
-                   ftp://gcc.gnu.org/pub/glibc/snapshots
+        if ! CT_GetFile "glibc-${addon}-${CT_LIBC_VERSION}"     \
+                        {ftp,http}://ftp.gnu.org/gnu/glibc      \
+                        ftp://gcc.gnu.org/pub/glibc/releases    \
+                        ftp://gcc.gnu.org/pub/glibc/snapshots
+        then
+            # Some add-ons are bundled with glibc, others are
+            # bundled in their own tarball. Eg. NPTL is internal,
+            # while LinuxThreads was external. Also, for old
+            # versions of glibc, the libidn add-on was external,
+            # but with version >=2.10, it is internal.
+            CT_DoLog DEBUG "Addon '${addon}' could not be downloaded."
+            CT_DoLog DEBUG "We'll see later if we can find it in the source tree"
+        fi
     done
 
     return 0