Index: cnf/make.conf
===================================================================
--- cnf/make.conf	(revision 7381)
+++ cnf/make.conf	(revision 7382)
@@ -262,6 +262,11 @@
 #  'distlocks'   enables distfiles locking using fcntl or hardlinks. This
 #                is enabled by default. Tools exist to help clean the locks
 #                after crashes: /usr/lib/portage/bin/clean_locks.
+#  'installsources'
+#                Install source code into /usr/src/debug/${CATEGORY}/${PF}
+#                (also see 'splitdebug'). This feature works only if debugedit
+#                is installed and CFLAGS is set to include debug information
+#                (such as with the -ggdb flag).
 #  'test'        causes ebuilds to perform testing phases if they are capable
 #                of it. Some packages support this automatically via makefiles.
 #  'metadata-transfer'
@@ -275,6 +280,10 @@
 #  'parallel-fetch'
 #                do fetching in parallel to compilation
 #  'sandbox'     enables sandboxing when running emerge and ebuild.
+#  'splitdebug'  Prior to stripping ELF etdyn and etexec files, the debugging
+#                info is stored for later use by various debuggers.  This
+#                feature is disabled by 'nostrip'.  For installation of source
+#                code, see 'installsources'.
 #  'strict'      causes portage to react strongly to conditions that are
 #                potentially dangerous, like missing/incorrect Manifest files.
 #  'stricter'    causes portage to react strongly to conditions that may
Index: bin/prepstrip
===================================================================
--- bin/prepstrip	(revision 7381)
+++ bin/prepstrip	(revision 7382)
@@ -25,6 +25,11 @@
 export SAFE_STRIP_FLAGS="--strip-unneeded"
 export PORTAGE_STRIP_FLAGS=${PORTAGE_STRIP_FLAGS-${SAFE_STRIP_FLAGS} -R .comment}
 
+if hasq installsources ${FEATURES} && ! type -P debugedit >/dev/null ; then
+	ewarn "FEATURES=installsources is enabled but the debugedit binary could not"
+	ewarn "be found. This feature will not work unless debugedit is installed!"
+fi
+
 save_elf_sources() {
 	hasq installsources ${FEATURES} || return 0
 	type -P debugedit >/dev/null || return 0