kbuild: Really don't clean bounds.h and asm-offsets.h
Commit 7d3cc8b tried to keep bounds.h and asm-offsets.h during make
clean by filtering these out of $(clean-files), but they are listed in
$(targets) and $(always) and thus removed automatically. Introduce a new
$(no-clean-files) variable to really skip such files in Makefile.clean.
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 0135155..fcd1a98 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -779,6 +779,13 @@
Kbuild will assume the directories to be in the same relative path as the
Makefile if no absolute path is specified (path does not start with '/').
+To exclude certain files from make clean, use the $(no-clean-files) variable.
+This is only a special case used in the top level Kbuild file:
+
+ Example:
+ #Kbuild
+ no-clean-files := $(bounds-file) $(offsets-file)
+
Usually kbuild descends down in subdirectories due to "obj-* := dir/",
but in the architecture makefiles where the kbuild infrastructure
is not sufficient this sometimes needs to be explicit.
diff --git a/Kbuild b/Kbuild
index e3737ad..18a8bfb 100644
--- a/Kbuild
+++ b/Kbuild
@@ -94,5 +94,5 @@
missing-syscalls: scripts/checksyscalls.sh FORCE
$(call cmd,syscalls)
-# Delete all targets during make clean
-clean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets)))
+# Keep these two files during make clean
+no-clean-files := $(bounds-file) $(offsets-file)
diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index 6f89fbb..686cb0d 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -45,6 +45,8 @@
$(host-progs) \
$(hostprogs-y) $(hostprogs-m) $(hostprogs-)
+__clean-files := $(filter-out $(no-clean-files), $(__clean-files))
+
# as clean-files is given relative to the current directory, this adds
# a $(obj) prefix, except for absolute paths