Since commit ("selftests: error out if kernel header files are not yet
built") got merged, the kselftest build correctly because the
KBUILD_OUTPUT isn't set when building out-of-tree and specifying 'O='
This is the error message that pops up.
make --silent --keep-going --jobs=32 O=/home/anders/.cache/tuxmake/builds/1482/build INSTALL_PATH=/home/anders/.cache/tuxmake/builds/1482/build/kselftest_install ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- V=1 CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- kselftest-install
make[3]: Entering directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
-e [1;31merror[0m: missing kernel header files.
Please run this and try again:
cd /home/anders/src/kernel/next/tools/testing/selftests/../../..
make headers
make[3]: Leaving directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
make[3]: *** [../lib.mk:77: kernel_header_files] Error 1
Fixing the issue by assigning KBUILD_OUTPUT the same way how its done in
kselftest's Makefile. By adding 'KBUILD_OUTPUT := $(O)' 'if $(origin O)'
is set to 'command line'. This will set the the BUILD dir to
KBUILD_OUTPUT/kselftest when doing out-of-tree builds which makes them
in its own separete output directory.
Signed-off-by: Anders Roxell <[email protected]>
---
tools/testing/selftests/lib.mk | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index b8ea03b9a015..d17854285f2b 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -44,6 +44,10 @@ endif
selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
top_srcdir = $(selfdir)/../../..
+ifeq ("$(origin O)", "command line")
+ KBUILD_OUTPUT := $(O)
+endif
+
ifneq ($(KBUILD_OUTPUT),)
# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
# expand a shell special character '~'. We use a somewhat tedious way here.
--
2.39.2
This patch needs to go through mm tree as the commit which it fixes is in mm.
On 6/13/23 12:49 PM, Anders Roxell wrote:
> Since commit ("selftests: error out if kernel header files are not yet
> built") got merged, the kselftest build correctly because the
> KBUILD_OUTPUT isn't set when building out-of-tree and specifying 'O='
> This is the error message that pops up.
>
> make --silent --keep-going --jobs=32 O=/home/anders/.cache/tuxmake/builds/1482/build INSTALL_PATH=/home/anders/.cache/tuxmake/builds/1482/build/kselftest_install ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- V=1 CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- kselftest-install
> make[3]: Entering directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
>
> -e [1;31merror[0m: missing kernel header files.
> Please run this and try again:
>
> cd /home/anders/src/kernel/next/tools/testing/selftests/../../..
> make headers
>
> make[3]: Leaving directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
> make[3]: *** [../lib.mk:77: kernel_header_files] Error 1
>
> Fixing the issue by assigning KBUILD_OUTPUT the same way how its done in
> kselftest's Makefile. By adding 'KBUILD_OUTPUT := $(O)' 'if $(origin O)'
> is set to 'command line'. This will set the the BUILD dir to
> KBUILD_OUTPUT/kselftest when doing out-of-tree builds which makes them
> in its own separete output directory.
>
> Signed-off-by: Anders Roxell <[email protected]>
Please add fixes tag. ("selftests: error out if kernel header files are not
yet built")
Tested-by: Muhammad Usama Anjum <[email protected]>
> ---
> tools/testing/selftests/lib.mk | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index b8ea03b9a015..d17854285f2b 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -44,6 +44,10 @@ endif
> selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
> top_srcdir = $(selfdir)/../../..
>
> +ifeq ("$(origin O)", "command line")
> + KBUILD_OUTPUT := $(O)
> +endif
> +
> ifneq ($(KBUILD_OUTPUT),)
> # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
> # expand a shell special character '~'. We use a somewhat tedious way here.
--
BR,
Muhammad Usama Anjum
On 13.06.23 10:16, Muhammad Usama Anjum wrote:
> This patch needs to go through mm tree as the commit which it fixes is in mm.
>
> On 6/13/23 12:49 PM, Anders Roxell wrote:
>> Since commit ("selftests: error out if kernel header files are not yet
>> built") got merged, the kselftest build correctly because the
>> KBUILD_OUTPUT isn't set when building out-of-tree and specifying 'O='
>> This is the error message that pops up.
>>
>> make --silent --keep-going --jobs=32 O=/home/anders/.cache/tuxmake/builds/1482/build INSTALL_PATH=/home/anders/.cache/tuxmake/builds/1482/build/kselftest_install ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- V=1 CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- kselftest-install
>> make[3]: Entering directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
>>
>> -e [1;31merror[0m: missing kernel header files.
>> Please run this and try again:
>>
>> cd /home/anders/src/kernel/next/tools/testing/selftests/../../..
>> make headers
>>
>> make[3]: Leaving directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
>> make[3]: *** [../lib.mk:77: kernel_header_files] Error 1
>>
>> Fixing the issue by assigning KBUILD_OUTPUT the same way how its done in
>> kselftest's Makefile. By adding 'KBUILD_OUTPUT := $(O)' 'if $(origin O)'
>> is set to 'command line'. This will set the the BUILD dir to
>> KBUILD_OUTPUT/kselftest when doing out-of-tree builds which makes them
>> in its own separete output directory.
>>
>> Signed-off-by: Anders Roxell <[email protected]>
> Please add fixes tag. ("selftests: error out if kernel header files are not
> yet built")
>
> Tested-by: Muhammad Usama Anjum <[email protected]>
This should get squashed into the original patch unless it's already in
mm-stable (which it isn't) and we have a stable commit id.
--
Cheers,
David / dhildenb
On 6/13/23 00:49, Anders Roxell wrote:
> Since commit ("selftests: error out if kernel header files are not yet
> built") got merged, the kselftest build correctly because the
> KBUILD_OUTPUT isn't set when building out-of-tree and specifying 'O='
> This is the error message that pops up.
>
> make --silent --keep-going --jobs=32 O=/home/anders/.cache/tuxmake/builds/1482/build INSTALL_PATH=/home/anders/.cache/tuxmake/builds/1482/build/kselftest_install ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- V=1 CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- kselftest-install
> make[3]: Entering directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
>
> -e [1;31merror[0m: missing kernel header files.
> Please run this and try again:
>
> cd /home/anders/src/kernel/next/tools/testing/selftests/../../..
> make headers
>
> make[3]: Leaving directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
> make[3]: *** [../lib.mk:77: kernel_header_files] Error 1
>
> Fixing the issue by assigning KBUILD_OUTPUT the same way how its done in
> kselftest's Makefile. By adding 'KBUILD_OUTPUT := $(O)' 'if $(origin O)'
> is set to 'command line'. This will set the the BUILD dir to
> KBUILD_OUTPUT/kselftest when doing out-of-tree builds which makes them
> in its own separete output directory.
>
> Signed-off-by: Anders Roxell <[email protected]>
> ---
> tools/testing/selftests/lib.mk | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index b8ea03b9a015..d17854285f2b 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -44,6 +44,10 @@ endif
> selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
> top_srcdir = $(selfdir)/../../..
>
> +ifeq ("$(origin O)", "command line")
> + KBUILD_OUTPUT := $(O)
> +endif
> +
Thanks for fixing this up! This looks correct.
(It's too bad that we have all this duplication between the Makefile
and lib.mk.)
thanks,
--
John Hubbard
NVIDIA
> ifneq ($(KBUILD_OUTPUT),)
> # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
> # expand a shell special character '~'. We use a somewhat tedious way here.
On Wed, 14 Jun 2023 at 04:23, John Hubbard <[email protected]> wrote:
>
> On 6/13/23 00:49, Anders Roxell wrote:
> > Since commit ("selftests: error out if kernel header files are not yet
> > built") got merged, the kselftest build correctly because the
> > KBUILD_OUTPUT isn't set when building out-of-tree and specifying 'O='
> > This is the error message that pops up.
> >
> > make --silent --keep-going --jobs=32 O=/home/anders/.cache/tuxmake/builds/1482/build INSTALL_PATH=/home/anders/.cache/tuxmake/builds/1482/build/kselftest_install ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- V=1 CROSS_COMPILE_COMPAT=arm-linux-gnueabihf- kselftest-install
> > make[3]: Entering directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
> >
> > -e [1;31merror [0m: missing kernel header files.
> > Please run this and try again:
> >
> > cd /home/anders/src/kernel/next/tools/testing/selftests/../../..
> > make headers
> >
> > make[3]: Leaving directory '/home/anders/src/kernel/next/tools/testing/selftests/alsa'
> > make[3]: *** [../lib.mk:77: kernel_header_files] Error 1
> >
> > Fixing the issue by assigning KBUILD_OUTPUT the same way how its done in
> > kselftest's Makefile. By adding 'KBUILD_OUTPUT := $(O)' 'if $(origin O)'
> > is set to 'command line'. This will set the the BUILD dir to
> > KBUILD_OUTPUT/kselftest when doing out-of-tree builds which makes them
> > in its own separete output directory.
> >
> > Signed-off-by: Anders Roxell <[email protected]>
> > ---
> > tools/testing/selftests/lib.mk | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> > index b8ea03b9a015..d17854285f2b 100644
> > --- a/tools/testing/selftests/lib.mk
> > +++ b/tools/testing/selftests/lib.mk
> > @@ -44,6 +44,10 @@ endif
> > selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
> > top_srcdir = $(selfdir)/../../..
> >
> > +ifeq ("$(origin O)", "command line")
> > + KBUILD_OUTPUT := $(O)
> > +endif
> > +
>
> Thanks for fixing this up! This looks correct.
>
> (It's too bad that we have all this duplication between the Makefile
> and lib.mk.)
I agree, also the duplication of get_sys_includes in bpf, hid and net Makefile's
Do you have any idea how we can remove the duplication?
Cheers,
Anders
>
> thanks,
> --
> John Hubbard
> NVIDIA
>
> > ifneq ($(KBUILD_OUTPUT),)
> > # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
> > # expand a shell special character '~'. We use a somewhat tedious way here.
>
>
On 6/14/23 14:16, Anders Roxell wrote:
>> (It's too bad that we have all this duplication between the Makefile
>> and lib.mk.)
>
> I agree, also the duplication of get_sys_includes in bpf, hid and net Makefile's
> Do you have any idea how we can remove the duplication?
>
Well, since you asked... :)
Yes. Given that the goal is to support two similar, related activities:
a) make -C tools/testing/selftests
b) make -C tools/testing/selftests/<subtest>
, we could move common functionality into common_vars.mk and
common_targets.mk, and include those from both the top level
tools/testing/selftests/Makefile, and the subtest Makefiles.
This allows deduplication in a fairly safe sort of way, because it also
simultaneously moves everything to a non-recursive Make design. That's
especially nice, because then dependencies work reliably, and you also
don't have to worry about propagating Make variables (via Make's export
directive).
I haven't done this, because a few years ago I somehow got the vague
impression that it would not be well-received. But maybe that's
pessimistic and/or obsolete--times change, after all!
***************************************************************
Contents of tools/testing/selftests/Makefile:
include common_vars.mk
include alsa/alsa.mk
include amd-pstate/amd-pstate.mk
include arm64/arm64.mk
...etc, there are 100+ subdirs
include common_targets.mk
(This is instead of doing "TARGETS += xxx" in the Makefile. Including
the subtest *.mk fragments allows each subtest to add features and
quirks as necessary, while also enabling full dependency checking via a
true non-recursive Make.)
***************************************************************
Contents of tools/testing/selftests/common_targets.mk:
all: kernel_headers
...
Other rules/targets here.
***************************************************************
Contents of tools/testing/selftests/common_vars.mk:
Common variables, some of which may be overridden by a Makefile.
***************************************************************
Using alsa as an example of a subtest:
***************************************************************
Contents of tools/testing/selftests/alsa/alsa.mk:
TARGETS += alsa
TEST* items
Plus: alsa-specific items, such as:
CFLAGS += $(shell pkg-config --cflags alsa)
***************************************************************
Contents of tools/testing/selftests/alsa/Makefile:
include ../common_vars.mk
include alsa.mk
...maybe very little else needs to go here.
include ../common_targets.mk
thanks,
--
John Hubbard
NVIDIA