* [PATCH] kbuild: flatten KBUILD_CFLAGS
@ 2023-07-13 18:52 Alexey Dobriyan
2023-07-14 10:42 ` Nicolas Schier
0 siblings, 1 reply; 6+ messages in thread
From: Alexey Dobriyan @ 2023-07-13 18:52 UTC (permalink / raw)
To: akpm, masahiroy, nathan, ndesaulniers, nicolas; +Cc: linux-kernel, linux-kbuild
Make it slightly easier to see which compiler options are added and
removed (and not worry about column limit too!).
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
Makefile | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
--- a/Makefile
+++ b/Makefile
@@ -555,11 +555,23 @@ LINUXINCLUDE := \
$(USERINCLUDE)
KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
-KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
- -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
- -Werror=implicit-function-declaration -Werror=implicit-int \
- -Werror=return-type -Wno-format-security -funsigned-char \
- -std=gnu11
+
+KBUILD_CFLAGS :=
+KBUILD_CFLAGS += -std=gnu11
+KBUILD_CFLAGS += -fshort-wchar
+KBUILD_CFLAGS += -funsigned-char
+KBUILD_CFLAGS += -fno-common
+KBUILD_CFLAGS += -fno-PIE
+KBUILD_CFLAGS += -fno-strict-aliasing
+KBUILD_CFLAGS += -Wall
+KBUILD_CFLAGS += -Wundef
+KBUILD_CFLAGS += -Werror=implicit-function-declaration
+KBUILD_CFLAGS += -Werror=implicit-int
+KBUILD_CFLAGS += -Werror=return-type
+KBUILD_CFLAGS += -Werror=strict-prototypes
+KBUILD_CFLAGS += -Wno-format-security
+KBUILD_CFLAGS += -Wno-trigraphs
+
KBUILD_CPPFLAGS := -D__KERNEL__
KBUILD_RUSTFLAGS := $(rust_common_flags) \
--target=$(objtree)/scripts/target.json \
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] kbuild: flatten KBUILD_CFLAGS
2023-07-13 18:52 [PATCH] kbuild: flatten KBUILD_CFLAGS Alexey Dobriyan
@ 2023-07-14 10:42 ` Nicolas Schier
2023-07-14 17:45 ` Alexey Dobriyan
0 siblings, 1 reply; 6+ messages in thread
From: Nicolas Schier @ 2023-07-14 10:42 UTC (permalink / raw)
To: Alexey Dobriyan
Cc: akpm, masahiroy, nathan, ndesaulniers, linux-kernel, linux-kbuild
[-- Attachment #1: Type: text/plain, Size: 1894 bytes --]
On Thu, Jul 13, 2023 at 09:52:28PM +0300, Alexey Dobriyan wrote:
> Make it slightly easier to see which compiler options are added and
> removed (and not worry about column limit too!).
>
> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
> ---
>
> Makefile | 22 +++++++++++++++++-----
> 1 file changed, 17 insertions(+), 5 deletions(-)
>
> --- a/Makefile
> +++ b/Makefile
> @@ -555,11 +555,23 @@ LINUXINCLUDE := \
> $(USERINCLUDE)
>
> KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
> -KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
> - -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
> - -Werror=implicit-function-declaration -Werror=implicit-int \
> - -Werror=return-type -Wno-format-security -funsigned-char \
> - -std=gnu11
> +
> +KBUILD_CFLAGS :=
> +KBUILD_CFLAGS += -std=gnu11
If you want to put -std at top, on contrast to the sorted options below,
you could also merge the two lines above.
> +KBUILD_CFLAGS += -fshort-wchar
> +KBUILD_CFLAGS += -funsigned-char
> +KBUILD_CFLAGS += -fno-common
> +KBUILD_CFLAGS += -fno-PIE
> +KBUILD_CFLAGS += -fno-strict-aliasing
> +KBUILD_CFLAGS += -Wall
> +KBUILD_CFLAGS += -Wundef
> +KBUILD_CFLAGS += -Werror=implicit-function-declaration
> +KBUILD_CFLAGS += -Werror=implicit-int
> +KBUILD_CFLAGS += -Werror=return-type
> +KBUILD_CFLAGS += -Werror=strict-prototypes
> +KBUILD_CFLAGS += -Wno-format-security
> +KBUILD_CFLAGS += -Wno-trigraphs
> +
> KBUILD_CPPFLAGS := -D__KERNEL__
> KBUILD_RUSTFLAGS := $(rust_common_flags) \
> --target=$(objtree)/scripts/target.json \
Thanks for the patch.
Reviewed-by: Nicolas Schier <n.schier@avm.de>
--
epost|xmpp: nicolas@fjasle.eu irc://oftc.net/nsc
↳ gpg: 18ed 52db e34f 860e e9fb c82b 7d97 0932 55a0 ce7f
-- frykten for herren er opphav til kunnskap --
[-- Attachment #2: signature.asc --]
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] kbuild: flatten KBUILD_CFLAGS
2023-07-14 10:42 ` Nicolas Schier
@ 2023-07-14 17:45 ` Alexey Dobriyan
2023-07-14 19:30 ` Nicolas Schier
2023-07-21 14:27 ` Masahiro Yamada
0 siblings, 2 replies; 6+ messages in thread
From: Alexey Dobriyan @ 2023-07-14 17:45 UTC (permalink / raw)
To: Nicolas Schier
Cc: akpm, masahiroy, nathan, ndesaulniers, linux-kernel, linux-kbuild
On Fri, Jul 14, 2023 at 12:42:11PM +0200, Nicolas Schier wrote:
> On Thu, Jul 13, 2023 at 09:52:28PM +0300, Alexey Dobriyan wrote:
> > Make it slightly easier to see which compiler options are added and
> > removed (and not worry about column limit too!).
> >
> > Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
> > ---
> >
> > Makefile | 22 +++++++++++++++++-----
> > 1 file changed, 17 insertions(+), 5 deletions(-)
> >
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -555,11 +555,23 @@ LINUXINCLUDE := \
> > $(USERINCLUDE)
> >
> > KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
> > -KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
> > - -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
> > - -Werror=implicit-function-declaration -Werror=implicit-int \
> > - -Werror=return-type -Wno-format-security -funsigned-char \
> > - -std=gnu11
> > +
> > +KBUILD_CFLAGS :=
> > +KBUILD_CFLAGS += -std=gnu11
>
> If you want to put -std at top, on contrast to the sorted options below,
> you could also merge the two lines above.
I don't know. Standard choice is arguably the most important option
so I put it first.
> > +KBUILD_CFLAGS += -fshort-wchar
> > +KBUILD_CFLAGS += -funsigned-char
> > +KBUILD_CFLAGS += -fno-common
> > +KBUILD_CFLAGS += -fno-PIE
> > +KBUILD_CFLAGS += -fno-strict-aliasing
> > +KBUILD_CFLAGS += -Wall
> > +KBUILD_CFLAGS += -Wundef
> > +KBUILD_CFLAGS += -Werror=implicit-function-declaration
> > +KBUILD_CFLAGS += -Werror=implicit-int
> > +KBUILD_CFLAGS += -Werror=return-type
> > +KBUILD_CFLAGS += -Werror=strict-prototypes
> > +KBUILD_CFLAGS += -Wno-format-security
> > +KBUILD_CFLAGS += -Wno-trigraphs
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] kbuild: flatten KBUILD_CFLAGS
2023-07-14 17:45 ` Alexey Dobriyan
@ 2023-07-14 19:30 ` Nicolas Schier
2023-07-15 6:36 ` Masahiro Yamada
2023-07-21 14:27 ` Masahiro Yamada
1 sibling, 1 reply; 6+ messages in thread
From: Nicolas Schier @ 2023-07-14 19:30 UTC (permalink / raw)
To: Alexey Dobriyan
Cc: akpm, masahiroy, nathan, ndesaulniers, linux-kernel, linux-kbuild
On Fri, Jul 14, 2023 at 08:45:00PM +0300 Alexey Dobriyan wrote:
> On Fri, Jul 14, 2023 at 12:42:11PM +0200, Nicolas Schier wrote:
> > On Thu, Jul 13, 2023 at 09:52:28PM +0300, Alexey Dobriyan wrote:
> > > Make it slightly easier to see which compiler options are added and
> > > removed (and not worry about column limit too!).
> > >
> > > Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
> > > ---
> > >
> > > Makefile | 22 +++++++++++++++++-----
> > > 1 file changed, 17 insertions(+), 5 deletions(-)
> > >
> > > --- a/Makefile
> > > +++ b/Makefile
> > > @@ -555,11 +555,23 @@ LINUXINCLUDE := \
> > > $(USERINCLUDE)
> > >
> > > KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
> > > -KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
> > > - -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
> > > - -Werror=implicit-function-declaration -Werror=implicit-int \
> > > - -Werror=return-type -Wno-format-security -funsigned-char \
> > > - -std=gnu11
> > > +
> > > +KBUILD_CFLAGS :=
> > > +KBUILD_CFLAGS += -std=gnu11
> >
> > If you want to put -std at top, on contrast to the sorted options below,
> > you could also merge the two lines above.
>
> I don't know. Standard choice is arguably the most important option
> so I put it first.
yes, I think I would have put it on top, too. I just would write it this way:
KBUILD_CFLAGS := -std=gnu11
KBUILD_CFLAGS += ...
But it is bike-shedding, ignore it if you're not convinced.
Kind regards,
Nicolas
> > > +KBUILD_CFLAGS += -fshort-wchar
> > > +KBUILD_CFLAGS += -funsigned-char
> > > +KBUILD_CFLAGS += -fno-common
> > > +KBUILD_CFLAGS += -fno-PIE
> > > +KBUILD_CFLAGS += -fno-strict-aliasing
> > > +KBUILD_CFLAGS += -Wall
> > > +KBUILD_CFLAGS += -Wundef
> > > +KBUILD_CFLAGS += -Werror=implicit-function-declaration
> > > +KBUILD_CFLAGS += -Werror=implicit-int
> > > +KBUILD_CFLAGS += -Werror=return-type
> > > +KBUILD_CFLAGS += -Werror=strict-prototypes
> > > +KBUILD_CFLAGS += -Wno-format-security
> > > +KBUILD_CFLAGS += -Wno-trigraphs
--
epost|xmpp: nicolas@fjasle.eu irc://oftc.net/nsc
↳ gpg: 18ed 52db e34f 860e e9fb c82b 7d97 0932 55a0 ce7f
-- frykten for herren er opphav til kunnskap --
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] kbuild: flatten KBUILD_CFLAGS
2023-07-14 19:30 ` Nicolas Schier
@ 2023-07-15 6:36 ` Masahiro Yamada
0 siblings, 0 replies; 6+ messages in thread
From: Masahiro Yamada @ 2023-07-15 6:36 UTC (permalink / raw)
To: Nicolas Schier
Cc: Alexey Dobriyan, akpm, nathan, ndesaulniers, linux-kernel,
linux-kbuild
On Sat, Jul 15, 2023 at 4:30 AM Nicolas Schier <nicolas@fjasle.eu> wrote:
>
> On Fri, Jul 14, 2023 at 08:45:00PM +0300 Alexey Dobriyan wrote:
> > On Fri, Jul 14, 2023 at 12:42:11PM +0200, Nicolas Schier wrote:
> > > On Thu, Jul 13, 2023 at 09:52:28PM +0300, Alexey Dobriyan wrote:
> > > > Make it slightly easier to see which compiler options are added and
> > > > removed (and not worry about column limit too!).
> > > >
> > > > Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
> > > > ---
> > > >
> > > > Makefile | 22 +++++++++++++++++-----
> > > > 1 file changed, 17 insertions(+), 5 deletions(-)
> > > >
> > > > --- a/Makefile
> > > > +++ b/Makefile
> > > > @@ -555,11 +555,23 @@ LINUXINCLUDE := \
> > > > $(USERINCLUDE)
> > > >
> > > > KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
> > > > -KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
> > > > - -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
> > > > - -Werror=implicit-function-declaration -Werror=implicit-int \
> > > > - -Werror=return-type -Wno-format-security -funsigned-char \
> > > > - -std=gnu11
> > > > +
> > > > +KBUILD_CFLAGS :=
> > > > +KBUILD_CFLAGS += -std=gnu11
> > >
> > > If you want to put -std at top, on contrast to the sorted options below,
> > > you could also merge the two lines above.
> >
> > I don't know. Standard choice is arguably the most important option
> > so I put it first.
>
> yes, I think I would have put it on top, too. I just would write it this way:
>
> KBUILD_CFLAGS := -std=gnu11
>
> KBUILD_CFLAGS += ...
>
> But it is bike-shedding, ignore it if you're not convinced.
>
> Kind regards,
> Nicolas
Starting line 813, we have more and more
"KBUILD_CFLAGS +=" lines.
I thought we perhaps could merge them in a single place.
(but "KBUILD_CFLAGS := " still must come before "export KBUILD_CFLAGS")
[move everything to line 813]
KBUILD_CFLAGS += -std=gnu11
KBUILD_CFLAGS += -fshort-wchar
KBUILD_CFLAGS += -funsigned-char
KBUILD_CFLAGS += -fno-common
KBUILD_CFLAGS += -fno-PIE
KBUILD_CFLAGS += -fno-strict-aliasing
KBUILD_CFLAGS += -Wall
KBUILD_CFLAGS += -Wundef
KBUILD_CFLAGS += -Werror=implicit-function-declaration
KBUILD_CFLAGS += -Werror=implicit-int
KBUILD_CFLAGS += -Werror=return-type
KBUILD_CFLAGS += -Werror=strict-prototypes
KBUILD_CFLAGS += -Wno-format-security
KBUILD_CFLAGS += -Wno-trigraphs
KBUILD_CFLAGS += -fno-delete-null-pointer-checks
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
...
That will change the order of compiler options
because they cross line 760
include $(srctree)/arch/$(SRCARCH)/Makefile
So, I think the patch is fine if we try to be safe.
--
Best Regards
Masahiro Yamada
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] kbuild: flatten KBUILD_CFLAGS
2023-07-14 17:45 ` Alexey Dobriyan
2023-07-14 19:30 ` Nicolas Schier
@ 2023-07-21 14:27 ` Masahiro Yamada
1 sibling, 0 replies; 6+ messages in thread
From: Masahiro Yamada @ 2023-07-21 14:27 UTC (permalink / raw)
To: Alexey Dobriyan
Cc: Nicolas Schier, akpm, nathan, ndesaulniers, linux-kernel,
linux-kbuild
On Sat, Jul 15, 2023 at 2:45 AM Alexey Dobriyan <adobriyan@gmail.com> wrote:
>
> On Fri, Jul 14, 2023 at 12:42:11PM +0200, Nicolas Schier wrote:
> > On Thu, Jul 13, 2023 at 09:52:28PM +0300, Alexey Dobriyan wrote:
> > > Make it slightly easier to see which compiler options are added and
> > > removed (and not worry about column limit too!).
> > >
> > > Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
> > > ---
> > >
> > > Makefile | 22 +++++++++++++++++-----
> > > 1 file changed, 17 insertions(+), 5 deletions(-)
> > >
> > > --- a/Makefile
> > > +++ b/Makefile
> > > @@ -555,11 +555,23 @@ LINUXINCLUDE := \
> > > $(USERINCLUDE)
> > >
> > > KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
> > > -KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
> > > - -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
> > > - -Werror=implicit-function-declaration -Werror=implicit-int \
> > > - -Werror=return-type -Wno-format-security -funsigned-char \
> > > - -std=gnu11
> > > +
> > > +KBUILD_CFLAGS :=
> > > +KBUILD_CFLAGS += -std=gnu11
> >
> > If you want to put -std at top, on contrast to the sorted options below,
> > you could also merge the two lines above.
>
> I don't know. Standard choice is arguably the most important option
> so I put it first.
>
> > > +KBUILD_CFLAGS += -fshort-wchar
> > > +KBUILD_CFLAGS += -funsigned-char
> > > +KBUILD_CFLAGS += -fno-common
> > > +KBUILD_CFLAGS += -fno-PIE
> > > +KBUILD_CFLAGS += -fno-strict-aliasing
> > > +KBUILD_CFLAGS += -Wall
> > > +KBUILD_CFLAGS += -Wundef
> > > +KBUILD_CFLAGS += -Werror=implicit-function-declaration
> > > +KBUILD_CFLAGS += -Werror=implicit-int
> > > +KBUILD_CFLAGS += -Werror=return-type
> > > +KBUILD_CFLAGS += -Werror=strict-prototypes
> > > +KBUILD_CFLAGS += -Wno-format-security
> > > +KBUILD_CFLAGS += -Wno-trigraphs
Applied to linux-kbuild.
Thanks.
--
Best Regards
Masahiro Yamada
^ permalink raw reply [flat|nested] 6+ messages in thread
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Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2023-07-13 18:52 [PATCH] kbuild: flatten KBUILD_CFLAGS Alexey Dobriyan
2023-07-14 10:42 ` Nicolas Schier
2023-07-14 17:45 ` Alexey Dobriyan
2023-07-14 19:30 ` Nicolas Schier
2023-07-15 6:36 ` Masahiro Yamada
2023-07-21 14:27 ` Masahiro Yamada
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