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Not synced completely.
Just cherry-picking low-hanging fruits.
0b35786d77ba kbuild: call make once for all targets when O=.. is used
5e54d5e5fbc1 kbuild: kill EXTRA_ARFLAGS
836caba77c29 kbuild: kill backward compatibility checks
3156fd0529b5 kbuild: fix some minor typoes
b8b0618cf6fa kbuild: remove extra ifdef/endif of top Makefile
16f890988114 kbuild: Remove reference to uninitialised variable
9319f4539c18 kbuild: support simultaneous "make %config" and "make all"
9d5db8949f1e scripts/Makefile.clean: clean also $(extra-m) and $(extra-)
a4954fd7724c kbuild: remove obj-n and lib-n handling
371fdc77af44 kbuild: collect shorthands into scripts/Kbuild.include
a29b82326ed4 kbuild: Remove duplicate $(cmd) definition in Makefile.clean
a1e7b7bb1ab5 Makefile: sort list of defconfig targets in make help output
34948e0bbf98 kbuild: Drop support for clean-rule
4218affdf57f kbuild: remove warning about "make depend"
9c8fa9bc08f6 kbuild: fix if_change and friends to consider argument order
39a33ff80a25 kbuild: remove cc-option-align
a7f924190924 kbuild: add %.dtb.S and %.dtb to 'targets' automatically
54a702f70589 kbuild: mark $(targets) as .SECONDARY and remove .PRECIOUS markers
9564a8cf422d Kbuild: fix # escaping in .cmd files for future Make
bd412d81b7ea kbuild: .PHONY is not a variable, but PHONY is
6916162c7308 kbuild: remove duplicated comments about PHONY
d6c6ab93e17f kbuild: remove deprecated host-progs variable
7d0ea2524202 kbuild: use 'else ifeq' for checksrc to improve readability
3f80babd9ca4 kbuild: remove unused cc-fullversion variable
bd352a739fde kbuild: remove unused baseprereq
b421b8a6cb87 kbuild: remove unused archmrproper
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Based on the following Linux commits:
- 54a702f70589 ("kbuild: mark $(targets) as .SECONDARY and remove
.PRECIOUS markers")
- 8e9b61b293d9 ("kbuild: move .SECONDARY special target to
Kbuild.include")
This consolidates those two commits and adjusts commit log for barebox.
GNU Make automatically deletes intermediate files that are updated
in a chain of pattern rules.
Example 1) %.dtb.o <- %.dtb.S <- %.dtb <- %.dts
Example 2) %.o <- %.c <- %.c_shipped
arch/arm/crypto/Makefile marks such targets as .PRECIOUS to prevent Make
from deleting them, but the correct way is to use .SECONDARY.
.SECONDARY
Prerequisites of this special target are treated as intermediate
files but are never automatically deleted.
.PRECIOUS
When make is interrupted during execution, it may delete the target
file it is updating if the file was modified since make started.
If you mark the file as precious, make will never delete the file
if interrupted.
Both can avoid deletion of intermediate files, but the difference is
the behavior when Make is interrupted; .SECONDARY deletes the target,
but .PRECIOUS does not.
The use of .PRECIOUS is relatively rare since we do not want to keep
partially constructed (possibly corrupted) targets.
.SECONDARY with no prerequisites causes all targets to be treated as
secondary. This agrees the policy of Kbuild.
scripts/Kbuild.include seems a suitable place to add it because it is
included from almost all sub-makes.
I deleted 'SECONDARY' (no dot) from images/Makefile, which I guess
a typo.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Linux commit 9c2af1c7377a8a6ef86e5cabf80978f3dbbb25c0
If Make gets a fatal signal while a shell is executing, it may delete
the target file that the recipe was supposed to update. This is needed
to make sure that it is remade from scratch when Make is next run; if
Make is interrupted after the recipe has begun to write the target file,
it results in an incomplete file whose time stamp is newer than that
of the prerequisites files. Make automatically deletes the incomplete
file on interrupt unless the target is marked .PRECIOUS.
The situation is just the same as when the shell fails for some reasons.
Usually when a recipe line fails, if it has changed the target file at
all, the file is corrupted, or at least it is not completely updated.
Yet the file’s time stamp says that it is now up to date, so the next
time Make runs, it will not try to update that file.
However, Make does not cater to delete the incomplete target file in
this case. We need to add .DELETE_ON_ERROR somewhere in the Makefile
to request it.
scripts/Kbuild.include seems a suitable place to add it because it is
included from almost all sub-makes.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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From e398a00f84db33ea5ae7f6ee12c54511ef7a94fc Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Tue, 26 Dec 2017 18:09:35 +0100
Subject: [PATCH 4/4] build: fix that LZO file is always rebuilt
Port the make-cmd from linux kernel.
with the updated version $$ is porperly escaped, thus
the LZO rule works as intended.
And we avoid rebuilds when not required
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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U-boot commit info:
http://git.denx.de/?p=u-boot.git;a=commit;h=e391b1e64b0bd65709a28a4764afe4f32d408243
Signed-off-by: Andrey Panov <rockford@yandex.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The call if_changed mechanism does not work when the command
contains backslashes. This basically is an issue with lzo
and bzip2 compressed kernels. The compressed binaries do not
contain the uncompressed image size, so these use size_append
to append the size. This results in backslashes in the executed
command. With this if_changed always detects a change in the
command and rebuilds the compressed image even if nothing
has changed.
Fix this by escaping backslashes in make-cmd
This was worked out together with Jan Lübbe. The same patch
has recently been accepted to the kernel.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
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To get cc-disable-warning
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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add missing Kconfig
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