Since commit d5470d14431e ("kbuild: re-implement Makefile.headersinst
without recursion"), headers_install emits an ugly warning.
$ make headers_install
[ snip ]
UPD include/generated/uapi/linux/version.h
find: ‘./include/uapi/Kbuild’: No such file or directory
HDRINST usr/include/video/uvesafb.h
...
This happens for GNU Make <= 4.2.1
When I wrote that commit, I missed this warning because I was using the
state-of-the-art Make version compiled from the git tree.
$(wildcard $(src)/*/) is intended to match to only existing directories
since it has a trailing slash, but actually matches to regular files too.
(include/uapi/Kbuild in this case)
This is a bug of GNU Make, and was fixed by:
| commit b7acb10e86dc8f5fdf2a2bbd87e1059c315e31d6
| Author: spagoveanu@xxxxxxxxx <spagoveanu@xxxxxxxxx>
| Date: Wed Jun 20 02:03:48 2018 +0300
|
| * src/dir.c: Preserve glob d_type field
We need to cater to old Make versions. Add '$(filter %/,...) to filter
out the regular files.
Fixes: d5470d14431e ("kbuild: re-implement Makefile.headersinst without recursion")
Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---
scripts/Makefile.headersinst | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst
index d2b572a7a628..ddc764838df2 100644
--- a/scripts/Makefile.headersinst
+++ b/scripts/Makefile.headersinst
@@ -20,8 +20,10 @@ dst := usr/include
-include $(src)/Kbuild
-src-subdirs := $(patsubst $(src)/%/,%,$(wildcard $(src)/*/))
-gen-subdirs := $(patsubst $(gen)/%/,%,$(wildcard $(gen)/*/))
+# $(filter %/, ...) is needed to workaround the bug for GNU Make <= 4.2.1
+# $(wildcard $(src)/*/) contains not only directories but also regular files.
+src-subdirs := $(patsubst $(src)/%/,%,$(filter %/, $(wildcard $(src)/*/)))
+gen-subdirs := $(patsubst $(gen)/%/,%,$(filter %/, $(wildcard $(gen)/*/)))
all-subdirs := $(sort $(src-subdirs) $(gen-subdirs))
src-headers := $(if $(src-subdirs), $(shell cd $(src) && find $(src-subdirs) -name '*.h'))
--
2.17.1
