[PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Xin Li (Intel)]

Meanwhile explicitly state that the headers are uapi headers.

Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Xin Li (Intel) <xin@zytor.com>
---
 Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 70bdbf2218fc..8f5aa710105e 100644
--- a/Makefile
+++ b/Makefile
@@ -1659,7 +1659,8 @@ help:
 	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
 	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
 	@echo  '  image_name	  - Output the image name (use with make -s)'
-	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
+	@echo  '  headers	  - Install sanitised kernel uapi headers to usr/include'
+	@echo  '  headers_install - Install sanitised kernel uapi headers to INSTALL_HDR_PATH'; \
 	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
 	 echo  ''
 	@echo  'Static analysers:'

base-commit: 7eb172143d5508b4da468ed59ee857c6e5e01da6
-- 
2.48.1

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Borislav Petkov]

On Fri, Mar 07, 2025 at 08:04:51PM -0800, Xin Li (Intel) wrote:
> Meanwhile explicitly state that the headers are uapi headers.
> 
> Suggested-by: Borislav Petkov <bp@alien8.de>
> Signed-off-by: Xin Li (Intel) <xin@zytor.com>
> ---
>  Makefile | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Makefile b/Makefile
> index 70bdbf2218fc..8f5aa710105e 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1659,7 +1659,8 @@ help:
>  	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
>  	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
>  	@echo  '  image_name	  - Output the image name (use with make -s)'
> -	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
> +	@echo  '  headers	  - Install sanitised kernel uapi headers to usr/include'
									     ^^^^^^^^^^^

It is INSTALL_HDR_PATH too, try:

make O=/tmp/b/ headers

for example.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Masahiro Yamada]

On Sat, Mar 8, 2025 at 7:35 PM Borislav Petkov <bp@alien8.de> wrote:
>
> On Fri, Mar 07, 2025 at 08:04:51PM -0800, Xin Li (Intel) wrote:
> > Meanwhile explicitly state that the headers are uapi headers.
> >
> > Suggested-by: Borislav Petkov <bp@alien8.de>
> > Signed-off-by: Xin Li (Intel) <xin@zytor.com>
> > ---
> >  Makefile | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/Makefile b/Makefile
> > index 70bdbf2218fc..8f5aa710105e 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -1659,7 +1659,8 @@ help:
> >       @echo  '  kernelrelease   - Output the release version string (use with make -s)'
> >       @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
> >       @echo  '  image_name      - Output the image name (use with make -s)'
> > -     @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
> > +     @echo  '  headers         - Install sanitised kernel uapi headers to usr/include'
>                                                                              ^^^^^^^^^^^
>
> It is INSTALL_HDR_PATH too, try:
>
> make O=/tmp/b/ headers
>
> for example.

No.   usr/include




--
Best Regards
Masahiro Yamada

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Borislav Petkov]

On Sun, Mar 09, 2025 at 12:15:21AM +0900, Masahiro Yamada wrote:
> > It is INSTALL_HDR_PATH too, try:
> >
> > make O=/tmp/b/ headers
> >
> > for example.
> 
> No.   usr/include

Yes, ok, "usr/include" is a relative path but it should at least say
*relative* to the current output directory so that it is perfectly clear.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Masahiro Yamada]

On Sat, Mar 8, 2025 at 1:05 PM Xin Li (Intel) <xin@zytor.com> wrote:
>
> Meanwhile explicitly state that the headers are uapi headers.

There are many internal-use targets, which are not documented in the
help message.
I assume this one is the case.

If users want to install UAPI headers, 'headers_install' is
the user-visible interface and it is already documented.





> Suggested-by: Borislav Petkov <bp@alien8.de>
> Signed-off-by: Xin Li (Intel) <xin@zytor.com>
> ---
>  Makefile | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index 70bdbf2218fc..8f5aa710105e 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1659,7 +1659,8 @@ help:
>         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
>         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
>         @echo  '  image_name      - Output the image name (use with make -s)'
> -       @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
> +       @echo  '  headers         - Install sanitised kernel uapi headers to usr/include'
> +       @echo  '  headers_install - Install sanitised kernel uapi headers to INSTALL_HDR_PATH'; \
>          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
>          echo  ''
>         @echo  'Static analysers:'
>
> base-commit: 7eb172143d5508b4da468ed59ee857c6e5e01da6
> --
> 2.48.1
>


--
Best Regards
Masahiro Yamada

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[H. Peter Anvin]

On March 8, 2025 7:12:59 AM PST, Masahiro Yamada <masahiroy@kernel.org> wrote:
>On Sat, Mar 8, 2025 at 1:05 PM Xin Li (Intel) <xin@zytor.com> wrote:
>>
>> Meanwhile explicitly state that the headers are uapi headers.
>
>There are many internal-use targets, which are not documented in the
>help message.
>I assume this one is the case.
>
>If users want to install UAPI headers, 'headers_install' is
>the user-visible interface and it is already documented.
>
>
>
>
>
>> Suggested-by: Borislav Petkov <bp@alien8.de>
>> Signed-off-by: Xin Li (Intel) <xin@zytor.com>
>> ---
>>  Makefile | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/Makefile b/Makefile
>> index 70bdbf2218fc..8f5aa710105e 100644
>> --- a/Makefile
>> +++ b/Makefile
>> @@ -1659,7 +1659,8 @@ help:
>>         @echo  '  kernelrelease   - Output the release version string (use with make -s)'
>>         @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
>>         @echo  '  image_name      - Output the image name (use with make -s)'
>> -       @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
>> +       @echo  '  headers         - Install sanitised kernel uapi headers to usr/include'
>> +       @echo  '  headers_install - Install sanitised kernel uapi headers to INSTALL_HDR_PATH'; \
>>          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
>>          echo  ''
>>         @echo  'Static analysers:'
>>
>> base-commit: 7eb172143d5508b4da468ed59ee857c6e5e01da6
>> --
>> 2.48.1
>>
>
>
>--
>Best Regards
>Masahiro Yamada
>

Unfortunately it seems users haven't been following that :(

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Borislav Petkov]

On Sat, Mar 08, 2025 at 08:01:56AM -0800, H. Peter Anvin wrote:
> Unfortunately it seems users haven't been following that :(

If by "users haven't been following that" you mean they've been doing

make kselftest

in order to run selftests and *that* thing builds headers, then yes, you're
right.

Oh look:

PHONY += kselftest
kselftest: headers
	   ^^^^^^^^
        $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests

:-P

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[H. Peter Anvin]

On March 8, 2025 8:41:51 AM PST, Borislav Petkov <bp@alien8.de> wrote:
>On Sat, Mar 08, 2025 at 08:01:56AM -0800, H. Peter Anvin wrote:
>> Unfortunately it seems users haven't been following that :(
>
>If by "users haven't been following that" you mean they've been doing
>
>make kselftest
>
>in order to run selftests and *that* thing builds headers, then yes, you're
>right.
>
>Oh look:
>
>PHONY += kselftest
>kselftest: headers
>	   ^^^^^^^^
>        $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
>
>:-P
>

That's not the only one. Point being that users have been using it so it is better to make it official than breaking it.

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Borislav Petkov]

On Sat, Mar 08, 2025 at 08:47:44AM -0800, H. Peter Anvin wrote:
> That's not the only one. Point being that users have been using it so it is
> better to make it official than breaking it.

Yap, it ain't internal anymore - that's for sure.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Xin Li]

On 3/8/2025 7:12 AM, Masahiro Yamada wrote:
> On Sat, Mar 8, 2025 at 1:05 PM Xin Li (Intel) <xin@zytor.com> wrote:
>>
>> Meanwhile explicitly state that the headers are uapi headers.
> 
> There are many internal-use targets, which are not documented in the
> help message.
> I assume this one is the case.
> 
> If users want to install UAPI headers, 'headers_install' is
> the user-visible interface and it is already documented.
> 
> 

hpa and Boris prefer to add it, which I also agree.  But ofc it's your
call :)

If you don't want to add help for "headers", it probably still makes
sense to explicitly state that the headers are uapi headers, no?

Thanks!
     Xin

> 
> 
> 
>> Suggested-by: Borislav Petkov <bp@alien8.de>
>> Signed-off-by: Xin Li (Intel) <xin@zytor.com>
>> ---
>>   Makefile | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/Makefile b/Makefile
>> index 70bdbf2218fc..8f5aa710105e 100644
>> --- a/Makefile
>> +++ b/Makefile
>> @@ -1659,7 +1659,8 @@ help:
>>          @echo  '  kernelrelease   - Output the release version string (use with make -s)'
>>          @echo  '  kernelversion   - Output the version stored in Makefile (use with make -s)'
>>          @echo  '  image_name      - Output the image name (use with make -s)'
>> -       @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
>> +       @echo  '  headers         - Install sanitised kernel uapi headers to usr/include'
>> +       @echo  '  headers_install - Install sanitised kernel uapi headers to INSTALL_HDR_PATH'; \
>>           echo  '                    (default: $(INSTALL_HDR_PATH))'; \
>>           echo  ''
>>          @echo  'Static analysers:'
>>
>> base-commit: 7eb172143d5508b4da468ed59ee857c6e5e01da6
>> --
>> 2.48.1
>>
> 
> 
> --
> Best Regards
> Masahiro Yamada
> 
> 

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Masahiro Yamada]

On Mon, Mar 10, 2025 at 3:23 PM Xin Li <xin@zytor.com> wrote:
>
> On 3/8/2025 7:12 AM, Masahiro Yamada wrote:
> > On Sat, Mar 8, 2025 at 1:05 PM Xin Li (Intel) <xin@zytor.com> wrote:
> >>
> >> Meanwhile explicitly state that the headers are uapi headers.
> >
> > There are many internal-use targets, which are not documented in the
> > help message.
> > I assume this one is the case.
> >
> > If users want to install UAPI headers, 'headers_install' is
> > the user-visible interface and it is already documented.
> >
> >
>
> hpa and Boris prefer to add it, which I also agree.  But ofc it's your
> call :)
>
> If you don't want to add help for "headers", it probably still makes
> sense to explicitly state that the headers are uapi headers, no?
>
> Thanks!
>      Xin


If a help message for "headers" is desired, how about this?

  headers  - Build read-to-install uapi headers in usr/include




-- 
Best Regards
Masahiro Yamada

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Masahiro Yamada]

On Tue, Mar 11, 2025 at 10:52 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> On Mon, Mar 10, 2025 at 3:23 PM Xin Li <xin@zytor.com> wrote:
> >
> > On 3/8/2025 7:12 AM, Masahiro Yamada wrote:
> > > On Sat, Mar 8, 2025 at 1:05 PM Xin Li (Intel) <xin@zytor.com> wrote:
> > >>
> > >> Meanwhile explicitly state that the headers are uapi headers.
> > >
> > > There are many internal-use targets, which are not documented in the
> > > help message.
> > > I assume this one is the case.
> > >
> > > If users want to install UAPI headers, 'headers_install' is
> > > the user-visible interface and it is already documented.
> > >
> > >
> >
> > hpa and Boris prefer to add it, which I also agree.  But ofc it's your
> > call :)
> >
> > If you don't want to add help for "headers", it probably still makes
> > sense to explicitly state that the headers are uapi headers, no?
> >
> > Thanks!
> >      Xin
>
>
> If a help message for "headers" is desired, how about this?
>
>   headers  - Build read-to-install uapi headers in usr/include




For clarification, the following is the rationale.


Build                 Installation
-------------------------------------
vmlinux               install
modules               modules_install
dtbs                  dtbs_install
headers               headers_install



In Kbuild, the Build and Installation are separate steps,
since the latter usually requires the root permission.


-- 
Best Regards
Masahiro Yamada

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Xin Li]

On 3/10/2025 7:13 PM, Masahiro Yamada wrote:
> On Tue, Mar 11, 2025 at 10:52 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>>
>> On Mon, Mar 10, 2025 at 3:23 PM Xin Li <xin@zytor.com> wrote:
>>>
>>> On 3/8/2025 7:12 AM, Masahiro Yamada wrote:
>>>> On Sat, Mar 8, 2025 at 1:05 PM Xin Li (Intel) <xin@zytor.com> wrote:
>>>>>
>>>>> Meanwhile explicitly state that the headers are uapi headers.
>>>>
>>>> There are many internal-use targets, which are not documented in the
>>>> help message.
>>>> I assume this one is the case.
>>>>
>>>> If users want to install UAPI headers, 'headers_install' is
>>>> the user-visible interface and it is already documented.
>>>>
>>>>
>>>
>>> hpa and Boris prefer to add it, which I also agree.  But ofc it's your
>>> call :)
>>>
>>> If you don't want to add help for "headers", it probably still makes
>>> sense to explicitly state that the headers are uapi headers, no?
>>>
>>> Thanks!
>>>       Xin
>>
>>
>> If a help message for "headers" is desired, how about this?
>>
>>    headers  - Build read-to-install uapi headers in usr/include
> 
> 
> 
> 
> For clarification, the following is the rationale.
> 
> 
> Build                 Installation
> -------------------------------------
> vmlinux               install
> modules               modules_install
> dtbs                  dtbs_install
> headers               headers_install
> 
> 
> 
> In Kbuild, the Build and Installation are separate steps,
> since the latter usually requires the root permission.
> 

Oh, I didn't realize, thanks for making it clear.
     Xin

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Xin Li]

On 3/10/2025 6:52 PM, Masahiro Yamada wrote:
> On Mon, Mar 10, 2025 at 3:23 PM Xin Li <xin@zytor.com> wrote:
>>
>> On 3/8/2025 7:12 AM, Masahiro Yamada wrote:
>>> On Sat, Mar 8, 2025 at 1:05 PM Xin Li (Intel) <xin@zytor.com> wrote:
>>>>
>>>> Meanwhile explicitly state that the headers are uapi headers.
>>>
>>> There are many internal-use targets, which are not documented in the
>>> help message.
>>> I assume this one is the case.
>>>
>>> If users want to install UAPI headers, 'headers_install' is
>>> the user-visible interface and it is already documented.
>>>
>>>
>>
>> hpa and Boris prefer to add it, which I also agree.  But ofc it's your
>> call :)
>>
>> If you don't want to add help for "headers", it probably still makes
>> sense to explicitly state that the headers are uapi headers, no?
>>
>> Thanks!
>>       Xin
> 
> 
> If a help message for "headers" is desired, how about this?
> 
>    headers  - Build read-to-install uapi headers in usr/include
> 

LGTM.

I guess you will make the change right now?

Thanks!
     Xin

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Masahiro Yamada]

On Tue, Mar 11, 2025 at 11:19 AM Xin Li <xin@zytor.com> wrote:
>
> On 3/10/2025 6:52 PM, Masahiro Yamada wrote:
> > On Mon, Mar 10, 2025 at 3:23 PM Xin Li <xin@zytor.com> wrote:
> >>
> >> On 3/8/2025 7:12 AM, Masahiro Yamada wrote:
> >>> On Sat, Mar 8, 2025 at 1:05 PM Xin Li (Intel) <xin@zytor.com> wrote:
> >>>>
> >>>> Meanwhile explicitly state that the headers are uapi headers.
> >>>
> >>> There are many internal-use targets, which are not documented in the
> >>> help message.
> >>> I assume this one is the case.
> >>>
> >>> If users want to install UAPI headers, 'headers_install' is
> >>> the user-visible interface and it is already documented.
> >>>
> >>>
> >>
> >> hpa and Boris prefer to add it, which I also agree.  But ofc it's your
> >> call :)
> >>
> >> If you don't want to add help for "headers", it probably still makes
> >> sense to explicitly state that the headers are uapi headers, no?
> >>
> >> Thanks!
> >>       Xin
> >
> >
> > If a help message for "headers" is desired, how about this?
> >
> >    headers  - Build read-to-install uapi headers in usr/include
> >
>
> LGTM.
>
> I guess you will make the change right now?
>

I will not do it myself, but I just suggested a change for v2.


-- 
Best Regards
Masahiro Yamada

Re: [PATCH v1 1/1] kbuild: Add "make headers" to "make help" output

[Xin Li]

On 3/10/2025 7:40 PM, Masahiro Yamada wrote:
>>> If a help message for "headers" is desired, how about this?
>>>
>>>     headers  - Build read-to-install uapi headers in usr/include
>>>
>>
>> LGTM.
>>
>> I guess you will make the change right now?
>>
> 
> I will not do it myself, but I just suggested a change for v2.
> 

I will take care of it then.