commit c4d5ee13984f57b2f881635c49045151679f5e8a
author Michal Marek <mmarek@suse.cz> Mon May 16 16:37:34 2011 +0200
committer Michal Marek <mmarek@suse.cz> Mon May 16 16:39:28 2011 +0200
tree a55ebb0ca69be2369f0efd391198206dfc5c4919
parent e0a04b11e4059cab033469617c2a3ce2d8cab416

kbuild: make KBUILD_NOCMDDEP=1 handle empty built-in.o

Based on a patch by Rabin Vincent.

Fix building with KBUILD_NOCMDDEP=1, which currently does not work
because it does not build built-in.o with no dependencies:

  LD      fs/notify/built-in.o
ld: cannot find fs/notify/dnotify/built-in.o: No such file or directory
ld: cannot find fs/notify/inotify/built-in.o: No such file or directory
ld: cannot find fs/notify/fanotify/built-in.o: No such file or directory

Reported-and-tested-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Michal Marek <mmarek@suse.cz>

scripts/Kbuild.include

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index c034dd7..be39cd1 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -197,6 +197,8 @@
 # User may override this check using make KBUILD_NOCMDDEP=1
 arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
                     $(filter-out $(cmd_$@),   $(cmd_$(1))) )
+else
+arg-check = $(if $(strip $(cmd_$@)),,1)
 endif
 
 # >'< substitution is for echo to work,