[PATCH 2/2] tools: do not include scripts/Kbuild.include

[PATCH 2/2] tools: do not include scripts/Kbuild.include

[Masahiro Yamada]

Since commit d9f4ff50d2aa ("kbuild: spilt cc-option and friends to
scripts/Makefile.compiler"), some kselftests fail to build.

The tools/ directory opted out Kbuild, and went in a different
direction. They copy any kind of files to the tools/ directory
in order to do whatever they want to do in their world.

tools/build/Build.include mimics scripts/Kbuild.include, but some
tool Makefiles included the Kbuild one to import a feature that is
missing in tools/build/Build.include:

 - Commit ec04aa3ae87b ("tools/thermal: tmon: use "-fstack-protector"
   only if supported") included scripts/Kbuild.include from
   tools/thermal/tmon/Makefile to import the cc-option macro.

 - Commit c2390f16fc5b ("selftests: kvm: fix for compilers that do
   not support -no-pie") included scripts/Kbuild.include from
   tools/testing/selftests/kvm/Makefile to import the try-run macro.

 - Commit 9cae4ace80ef ("selftests/bpf: do not ignore clang
   failures") included scripts/Kbuild.include from
   tools/testing/selftests/bpf/Makefile to import the .DELETE_ON_ERROR
   target.

 - Commit 0695f8bca93e ("selftests/powerpc: Handle Makefile for
   unrecognized option") included scripts/Kbuild.include from
   tools/testing/selftests/powerpc/pmu/ebb/Makefile to import the
   try-run macro.

Copy what they want there, and stop including scripts/Kbuild.include
from the tool Makefiles.

Link: https://lore.kernel.org/lkml/86dadf33-70f7-a5ac-cb8c-64966d2f45a1@linux.ibm.com/
Fixes: d9f4ff50d2aa ("kbuild: spilt cc-option and friends to scripts/Makefile.compiler")
Reported-by: Janosch Frank <frankja@linux.ibm.com>
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 tools/testing/selftests/bpf/Makefile          |  3 ++-
 tools/testing/selftests/kvm/Makefile          | 12 +++++++++++-
 .../selftests/powerpc/pmu/ebb/Makefile        | 11 ++++++++++-
 tools/thermal/tmon/Makefile                   | 19 +++++++++++++++++--
 4 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 044bfdcf5b74..d872b9f41543 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -1,5 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
-include ../../../../scripts/Kbuild.include
 include ../../../scripts/Makefile.arch
 include ../../../scripts/Makefile.include
 
@@ -476,3 +475,5 @@ EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR)	\
 	prog_tests/tests.h map_tests/tests.h verifier/tests.h		\
 	feature								\
 	$(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32 bpf_gcc bpf_testmod.ko)
+
+.DELETE_ON_ERROR:
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index a6d61f451f88..8b45bc417d83 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -1,5 +1,15 @@
 # SPDX-License-Identifier: GPL-2.0-only
-include ../../../../scripts/Kbuild.include
+
+TMPOUT = .tmp_$$$$
+
+try-run = $(shell set -e;		\
+	TMP=$(TMPOUT)/tmp;		\
+	mkdir -p $(TMPOUT);		\
+	trap "rm -rf $(TMPOUT)" EXIT;	\
+	if ($(1)) >/dev/null 2>&1;	\
+	then echo "$(2)";		\
+	else echo "$(3)";		\
+	fi)
 
 all:
 
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/Makefile b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
index af3df79d8163..d5d3e869df93 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/Makefile
+++ b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
@@ -1,5 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
-include ../../../../../../scripts/Kbuild.include
 
 noarg:
 	$(MAKE) -C ../../
@@ -8,6 +7,16 @@ noarg:
 CFLAGS += -m64
 
 TMPOUT = $(OUTPUT)/TMPDIR/
+
+try-run = $(shell set -e;		\
+	TMP=$(TMPOUT)/tmp;		\
+	mkdir -p $(TMPOUT);		\
+	trap "rm -rf $(TMPOUT)" EXIT;	\
+	if ($(1)) >/dev/null 2>&1;	\
+	then echo "$(2)";		\
+	else echo "$(3)";		\
+	fi)
+
 # Toolchains may build PIE by default which breaks the assembly
 no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \
         $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie)
diff --git a/tools/thermal/tmon/Makefile b/tools/thermal/tmon/Makefile
index 59e417ec3e13..92a683e4866c 100644
--- a/tools/thermal/tmon/Makefile
+++ b/tools/thermal/tmon/Makefile
@@ -1,6 +1,21 @@
 # SPDX-License-Identifier: GPL-2.0
-# We need this for the "cc-option" macro.
-include ../../../scripts/Kbuild.include
+
+TMPOUT = .tmp_$$$$
+
+try-run = $(shell set -e;		\
+	TMP=$(TMPOUT)/tmp;		\
+	mkdir -p $(TMPOUT);		\
+	trap "rm -rf $(TMPOUT)" EXIT;	\
+	if ($(1)) >/dev/null 2>&1;	\
+	then echo "$(2)";		\
+	else echo "$(3)";		\
+	fi)
+
+__cc-option = $(call try-run,\
+	$(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4))
+
+cc-option = $(call __cc-option, $(CC),\
+	$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2))
 
 VERSION = 1.0
 
-- 
2.27.0

Re: [PATCH 2/2] tools: do not include scripts/Kbuild.include

[Paolo Bonzini]

On 15/04/21 09:27, Masahiro Yamada wrote:
> Since commit d9f4ff50d2aa ("kbuild: spilt cc-option and friends to
> scripts/Makefile.compiler"), some kselftests fail to build.
> 
> The tools/ directory opted out Kbuild, and went in a different
> direction. They copy any kind of files to the tools/ directory
> in order to do whatever they want to do in their world.
> 
> tools/build/Build.include mimics scripts/Kbuild.include, but some
> tool Makefiles included the Kbuild one to import a feature that is
> missing in tools/build/Build.include:
> 
>   - Commit ec04aa3ae87b ("tools/thermal: tmon: use "-fstack-protector"
>     only if supported") included scripts/Kbuild.include from
>     tools/thermal/tmon/Makefile to import the cc-option macro.
> 
>   - Commit c2390f16fc5b ("selftests: kvm: fix for compilers that do
>     not support -no-pie") included scripts/Kbuild.include from
>     tools/testing/selftests/kvm/Makefile to import the try-run macro.
> 
>   - Commit 9cae4ace80ef ("selftests/bpf: do not ignore clang
>     failures") included scripts/Kbuild.include from
>     tools/testing/selftests/bpf/Makefile to import the .DELETE_ON_ERROR
>     target.
> 
>   - Commit 0695f8bca93e ("selftests/powerpc: Handle Makefile for
>     unrecognized option") included scripts/Kbuild.include from
>     tools/testing/selftests/powerpc/pmu/ebb/Makefile to import the
>     try-run macro.
> 
> Copy what they want there, and stop including scripts/Kbuild.include
> from the tool Makefiles.

I think it would make sense to add try-run, cc-option and 
.DELETE_ON_ERROR to tools/build/Build.include?

Paolo

> Link: https://lore.kernel.org/lkml/86dadf33-70f7-a5ac-cb8c-64966d2f45a1@linux.ibm.com/
> Fixes: d9f4ff50d2aa ("kbuild: spilt cc-option and friends to scripts/Makefile.compiler")
> Reported-by: Janosch Frank <frankja@linux.ibm.com>
> Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> ---
> 
>   tools/testing/selftests/bpf/Makefile          |  3 ++-
>   tools/testing/selftests/kvm/Makefile          | 12 +++++++++++-
>   .../selftests/powerpc/pmu/ebb/Makefile        | 11 ++++++++++-
>   tools/thermal/tmon/Makefile                   | 19 +++++++++++++++++--
>   4 files changed, 40 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> index 044bfdcf5b74..d872b9f41543 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -1,5 +1,4 @@
>   # SPDX-License-Identifier: GPL-2.0
> -include ../../../../scripts/Kbuild.include
>   include ../../../scripts/Makefile.arch
>   include ../../../scripts/Makefile.include
>   
> @@ -476,3 +475,5 @@ EXTRA_CLEAN := $(TEST_CUSTOM_PROGS) $(SCRATCH_DIR) $(HOST_SCRATCH_DIR)	\
>   	prog_tests/tests.h map_tests/tests.h verifier/tests.h		\
>   	feature								\
>   	$(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32 bpf_gcc bpf_testmod.ko)
> +
> +.DELETE_ON_ERROR:
> diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
> index a6d61f451f88..8b45bc417d83 100644
> --- a/tools/testing/selftests/kvm/Makefile
> +++ b/tools/testing/selftests/kvm/Makefile
> @@ -1,5 +1,15 @@
>   # SPDX-License-Identifier: GPL-2.0-only
> -include ../../../../scripts/Kbuild.include
> +
> +TMPOUT = .tmp_$$$$
> +
> +try-run = $(shell set -e;		\
> +	TMP=$(TMPOUT)/tmp;		\
> +	mkdir -p $(TMPOUT);		\
> +	trap "rm -rf $(TMPOUT)" EXIT;	\
> +	if ($(1)) >/dev/null 2>&1;	\
> +	then echo "$(2)";		\
> +	else echo "$(3)";		\
> +	fi)
>   
>   all:
>   
> diff --git a/tools/testing/selftests/powerpc/pmu/ebb/Makefile b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
> index af3df79d8163..d5d3e869df93 100644
> --- a/tools/testing/selftests/powerpc/pmu/ebb/Makefile
> +++ b/tools/testing/selftests/powerpc/pmu/ebb/Makefile
> @@ -1,5 +1,4 @@
>   # SPDX-License-Identifier: GPL-2.0
> -include ../../../../../../scripts/Kbuild.include
>   
>   noarg:
>   	$(MAKE) -C ../../
> @@ -8,6 +7,16 @@ noarg:
>   CFLAGS += -m64
>   
>   TMPOUT = $(OUTPUT)/TMPDIR/
> +
> +try-run = $(shell set -e;		\
> +	TMP=$(TMPOUT)/tmp;		\
> +	mkdir -p $(TMPOUT);		\
> +	trap "rm -rf $(TMPOUT)" EXIT;	\
> +	if ($(1)) >/dev/null 2>&1;	\
> +	then echo "$(2)";		\
> +	else echo "$(3)";		\
> +	fi)
> +
>   # Toolchains may build PIE by default which breaks the assembly
>   no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \
>           $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie)
> diff --git a/tools/thermal/tmon/Makefile b/tools/thermal/tmon/Makefile
> index 59e417ec3e13..92a683e4866c 100644
> --- a/tools/thermal/tmon/Makefile
> +++ b/tools/thermal/tmon/Makefile
> @@ -1,6 +1,21 @@
>   # SPDX-License-Identifier: GPL-2.0
> -# We need this for the "cc-option" macro.
> -include ../../../scripts/Kbuild.include
> +
> +TMPOUT = .tmp_$$$$
> +
> +try-run = $(shell set -e;		\
> +	TMP=$(TMPOUT)/tmp;		\
> +	mkdir -p $(TMPOUT);		\
> +	trap "rm -rf $(TMPOUT)" EXIT;	\
> +	if ($(1)) >/dev/null 2>&1;	\
> +	then echo "$(2)";		\
> +	else echo "$(3)";		\
> +	fi)
> +
> +__cc-option = $(call try-run,\
> +	$(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4))
> +
> +cc-option = $(call __cc-option, $(CC),\
> +	$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2))
>   
>   VERSION = 1.0
>   
> 

Re: [PATCH 2/2] tools: do not include scripts/Kbuild.include

[Masahiro Yamada]

On Thu, Apr 15, 2021 at 4:40 PM Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> On 15/04/21 09:27, Masahiro Yamada wrote:
> > Since commit d9f4ff50d2aa ("kbuild: spilt cc-option and friends to
> > scripts/Makefile.compiler"), some kselftests fail to build.
> >
> > The tools/ directory opted out Kbuild, and went in a different
> > direction. They copy any kind of files to the tools/ directory
> > in order to do whatever they want to do in their world.
> >
> > tools/build/Build.include mimics scripts/Kbuild.include, but some
> > tool Makefiles included the Kbuild one to import a feature that is
> > missing in tools/build/Build.include:
> >
> >   - Commit ec04aa3ae87b ("tools/thermal: tmon: use "-fstack-protector"
> >     only if supported") included scripts/Kbuild.include from
> >     tools/thermal/tmon/Makefile to import the cc-option macro.
> >
> >   - Commit c2390f16fc5b ("selftests: kvm: fix for compilers that do
> >     not support -no-pie") included scripts/Kbuild.include from
> >     tools/testing/selftests/kvm/Makefile to import the try-run macro.
> >
> >   - Commit 9cae4ace80ef ("selftests/bpf: do not ignore clang
> >     failures") included scripts/Kbuild.include from
> >     tools/testing/selftests/bpf/Makefile to import the .DELETE_ON_ERROR
> >     target.
> >
> >   - Commit 0695f8bca93e ("selftests/powerpc: Handle Makefile for
> >     unrecognized option") included scripts/Kbuild.include from
> >     tools/testing/selftests/powerpc/pmu/ebb/Makefile to import the
> >     try-run macro.
> >
> > Copy what they want there, and stop including scripts/Kbuild.include
> > from the tool Makefiles.
>
> I think it would make sense to add try-run, cc-option and
> .DELETE_ON_ERROR to tools/build/Build.include?


To be safe, I just copy-pasted what the makefiles need.
If someone wants to refactor the tool build system, that is fine,
but, to me, I do not see consistent rules or policy under tools/.

-- 
Best Regards
Masahiro Yamada

Re: [PATCH 2/2] tools: do not include scripts/Kbuild.include

[Christian Borntraeger]

On 15.04.21 09:27, Masahiro Yamada wrote:
> Since commit d9f4ff50d2aa ("kbuild: spilt cc-option and friends to
> scripts/Makefile.compiler"), some kselftests fail to build.
> 
> The tools/ directory opted out Kbuild, and went in a different
> direction. They copy any kind of files to the tools/ directory
> in order to do whatever they want to do in their world.
> 
> tools/build/Build.include mimics scripts/Kbuild.include, but some
> tool Makefiles included the Kbuild one to import a feature that is
> missing in tools/build/Build.include:
> 
>   - Commit ec04aa3ae87b ("tools/thermal: tmon: use "-fstack-protector"
>     only if supported") included scripts/Kbuild.include from
>     tools/thermal/tmon/Makefile to import the cc-option macro.
> 
>   - Commit c2390f16fc5b ("selftests: kvm: fix for compilers that do
>     not support -no-pie") included scripts/Kbuild.include from
>     tools/testing/selftests/kvm/Makefile to import the try-run macro.
> 
>   - Commit 9cae4ace80ef ("selftests/bpf: do not ignore clang
>     failures") included scripts/Kbuild.include from
>     tools/testing/selftests/bpf/Makefile to import the .DELETE_ON_ERROR
>     target.
> 
>   - Commit 0695f8bca93e ("selftests/powerpc: Handle Makefile for
>     unrecognized option") included scripts/Kbuild.include from
>     tools/testing/selftests/powerpc/pmu/ebb/Makefile to import the
>     try-run macro.
> 
> Copy what they want there, and stop including scripts/Kbuild.include
> from the tool Makefiles.
> 
> Link: https://lore.kernel.org/lkml/86dadf33-70f7-a5ac-cb8c-64966d2f45a1@linux.ibm.com/
> Fixes: d9f4ff50d2aa ("kbuild: spilt cc-option and friends to scripts/Makefile.compiler")
> Reported-by: Janosch Frank <frankja@linux.ibm.com>
> Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

When applying this on top of d9f4ff50d2aa ("kbuild: spilt cc-option and friends to scripts/Makefile.compiler")

I still do get

# ==== Test Assertion Failure ====
#   lib/kvm_util.c:142: vm->fd >= 0
#   pid=315635 tid=315635 - Invalid argument
#      1	0x0000000001002f4b: vm_open at kvm_util.c:142
#      2	 (inlined by) vm_create at kvm_util.c:258
#      3	0x00000000010015ef: test_add_max_memory_regions at set_memory_region_test.c:351
#      4	 (inlined by) main at set_memory_region_test.c:397
#      5	0x000003ff971abb89: ?? ??:0
#      6	0x00000000010017ad: .annobin_abi_note.c.hot at crt1.o:?
#   KVM_CREATE_VM ioctl failed, rc: -1 errno: 22
not ok 7 selftests: kvm: set_memory_region_test # exit=254

and the testcase compilation does not pickup the pgste option.

Re: [PATCH 2/2] tools: do not include scripts/Kbuild.include

[Paolo Bonzini]

On 15/04/21 10:04, Masahiro Yamada wrote:
> On Thu, Apr 15, 2021 at 4:40 PM Paolo Bonzini <pbonzini@redhat.com> wrote:
>> I think it would make sense to add try-run, cc-option and
>> .DELETE_ON_ERROR to tools/build/Build.include?
> 
> To be safe, I just copy-pasted what the makefiles need.
> If someone wants to refactor the tool build system, that is fine,
> but, to me, I do not see consistent rules or policy under tools/.

"Please put this in a common file instead of introducing duplication" is 
not asking for wholesale refactoring.

Paolo

Re: [PATCH 2/2] tools: do not include scripts/Kbuild.include

[Christian Borntraeger]

On 15.04.21 10:06, Christian Borntraeger wrote:
> 
> On 15.04.21 09:27, Masahiro Yamada wrote:
>> Since commit d9f4ff50d2aa ("kbuild: spilt cc-option and friends to
>> scripts/Makefile.compiler"), some kselftests fail to build.
>>
>> The tools/ directory opted out Kbuild, and went in a different
>> direction. They copy any kind of files to the tools/ directory
>> in order to do whatever they want to do in their world.
>>
>> tools/build/Build.include mimics scripts/Kbuild.include, but some
>> tool Makefiles included the Kbuild one to import a feature that is
>> missing in tools/build/Build.include:
>>
>>   - Commit ec04aa3ae87b ("tools/thermal: tmon: use "-fstack-protector"
>>     only if supported") included scripts/Kbuild.include from
>>     tools/thermal/tmon/Makefile to import the cc-option macro.
>>
>>   - Commit c2390f16fc5b ("selftests: kvm: fix for compilers that do
>>     not support -no-pie") included scripts/Kbuild.include from
>>     tools/testing/selftests/kvm/Makefile to import the try-run macro.
>>
>>   - Commit 9cae4ace80ef ("selftests/bpf: do not ignore clang
>>     failures") included scripts/Kbuild.include from
>>     tools/testing/selftests/bpf/Makefile to import the .DELETE_ON_ERROR
>>     target.
>>
>>   - Commit 0695f8bca93e ("selftests/powerpc: Handle Makefile for
>>     unrecognized option") included scripts/Kbuild.include from
>>     tools/testing/selftests/powerpc/pmu/ebb/Makefile to import the
>>     try-run macro.
>>
>> Copy what they want there, and stop including scripts/Kbuild.include
>> from the tool Makefiles.
>>
>> Link: https://lore.kernel.org/lkml/86dadf33-70f7-a5ac-cb8c-64966d2f45a1@linux.ibm.com/
>> Fixes: d9f4ff50d2aa ("kbuild: spilt cc-option and friends to scripts/Makefile.compiler")
>> Reported-by: Janosch Frank <frankja@linux.ibm.com>
>> Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
>> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> 
> When applying this on top of d9f4ff50d2aa ("kbuild: spilt cc-option and friends to scripts/Makefile.compiler")
> 
> I still do get
> 
> # ==== Test Assertion Failure ====
> #   lib/kvm_util.c:142: vm->fd >= 0
> #   pid=315635 tid=315635 - Invalid argument
> #      1    0x0000000001002f4b: vm_open at kvm_util.c:142
> #      2     (inlined by) vm_create at kvm_util.c:258
> #      3    0x00000000010015ef: test_add_max_memory_regions at set_memory_region_test.c:351
> #      4     (inlined by) main at set_memory_region_test.c:397
> #      5    0x000003ff971abb89: ?? ??:0
> #      6    0x00000000010017ad: .annobin_abi_note.c.hot at crt1.o:?
> #   KVM_CREATE_VM ioctl failed, rc: -1 errno: 22
> not ok 7 selftests: kvm: set_memory_region_test # exit=254
> 
> and the testcase compilation does not pickup the pgste option.


What does work is the following:
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index a6d61f451f88..d9c6d9c2069e 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -1,5 +1,6 @@
  # SPDX-License-Identifier: GPL-2.0-only
  include ../../../../scripts/Kbuild.include
+include ../../../../scripts/Makefile.compiler
  
  all:
  

as it does pickup the linker option handling.

Re: [PATCH 2/2] tools: do not include scripts/Kbuild.include

[Masahiro Yamada]

On Fri, Apr 16, 2021 at 2:56 PM Christian Borntraeger
<borntraeger@de.ibm.com> wrote:
>
>
> On 15.04.21 10:06, Christian Borntraeger wrote:
> >
> > On 15.04.21 09:27, Masahiro Yamada wrote:
> >> Since commit d9f4ff50d2aa ("kbuild: spilt cc-option and friends to
> >> scripts/Makefile.compiler"), some kselftests fail to build.
> >>
> >> The tools/ directory opted out Kbuild, and went in a different
> >> direction. They copy any kind of files to the tools/ directory
> >> in order to do whatever they want to do in their world.
> >>
> >> tools/build/Build.include mimics scripts/Kbuild.include, but some
> >> tool Makefiles included the Kbuild one to import a feature that is
> >> missing in tools/build/Build.include:
> >>
> >>   - Commit ec04aa3ae87b ("tools/thermal: tmon: use "-fstack-protector"
> >>     only if supported") included scripts/Kbuild.include from
> >>     tools/thermal/tmon/Makefile to import the cc-option macro.
> >>
> >>   - Commit c2390f16fc5b ("selftests: kvm: fix for compilers that do
> >>     not support -no-pie") included scripts/Kbuild.include from
> >>     tools/testing/selftests/kvm/Makefile to import the try-run macro.
> >>
> >>   - Commit 9cae4ace80ef ("selftests/bpf: do not ignore clang
> >>     failures") included scripts/Kbuild.include from
> >>     tools/testing/selftests/bpf/Makefile to import the .DELETE_ON_ERROR
> >>     target.
> >>
> >>   - Commit 0695f8bca93e ("selftests/powerpc: Handle Makefile for
> >>     unrecognized option") included scripts/Kbuild.include from
> >>     tools/testing/selftests/powerpc/pmu/ebb/Makefile to import the
> >>     try-run macro.
> >>
> >> Copy what they want there, and stop including scripts/Kbuild.include
> >> from the tool Makefiles.
> >>
> >> Link: https://lore.kernel.org/lkml/86dadf33-70f7-a5ac-cb8c-64966d2f45a1@linux.ibm.com/
> >> Fixes: d9f4ff50d2aa ("kbuild: spilt cc-option and friends to scripts/Makefile.compiler")
> >> Reported-by: Janosch Frank <frankja@linux.ibm.com>
> >> Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
> >> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> >
> > When applying this on top of d9f4ff50d2aa ("kbuild: spilt cc-option and friends to scripts/Makefile.compiler")
> >
> > I still do get
> >
> > # ==== Test Assertion Failure ====
> > #   lib/kvm_util.c:142: vm->fd >= 0
> > #   pid=315635 tid=315635 - Invalid argument
> > #      1    0x0000000001002f4b: vm_open at kvm_util.c:142
> > #      2     (inlined by) vm_create at kvm_util.c:258
> > #      3    0x00000000010015ef: test_add_max_memory_regions at set_memory_region_test.c:351
> > #      4     (inlined by) main at set_memory_region_test.c:397
> > #      5    0x000003ff971abb89: ?? ??:0
> > #      6    0x00000000010017ad: .annobin_abi_note.c.hot at crt1.o:?
> > #   KVM_CREATE_VM ioctl failed, rc: -1 errno: 22
> > not ok 7 selftests: kvm: set_memory_region_test # exit=254
> >
> > and the testcase compilation does not pickup the pgste option.
>
> What does work is the following:
> diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
> index a6d61f451f88..d9c6d9c2069e 100644
> --- a/tools/testing/selftests/kvm/Makefile
> +++ b/tools/testing/selftests/kvm/Makefile
> @@ -1,5 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0-only
>   include ../../../../scripts/Kbuild.include
> +include ../../../../scripts/Makefile.compiler
>
>   all:
>
>
> as it does pickup the linker option handling.


Kbuild and the tools are divorced.

They cannot be married unless the tools/
build system is largely refactored.
That will be a tons of works (and
I am not sure if it is welcome).

The Kbuild refactoring should not be bothered by
the tools.
For now, I want them separated from each other.



--
Best Regards

Masahiro Yamada