* [PATCH] tools: Stop re-defining -std= when building tools
@ 2021-10-10 19:23 Tom Rini
2021-10-11 3:21 ` Bin Meng
0 siblings, 1 reply; 4+ messages in thread
From: Tom Rini @ 2021-10-10 19:23 UTC (permalink / raw)
To: u-boot
While we intentionally set -std=gnu11 for building host tools, and have
for quite some time, we never dropped -std=gnu99 from tools/Makefile.
This resulted in passing -std=gnu11 ... -std=gnu99 when building, and
gnu99 would win. This in turn would result now in warnings such as:
tools/mkeficapsule.c:25:15: warning: redefinition of typedef 'u32' is a C11 feature [-Wtypedef-redefinition]
typedef __u32 u32;
^
Signed-off-by: Tom Rini <trini@konsulko.com>
---
tools/Makefile | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tools/Makefile b/tools/Makefile
index 999fd4653166..b45219e2c30c 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -295,8 +295,7 @@ HOST_EXTRACFLAGS += -include $(srctree)/include/compiler.h \
-I$(srctree)/tools \
-DUSE_HOSTCC \
-D__KERNEL_STRICT_NAMES \
- -D_GNU_SOURCE \
- -std=gnu99
+ -D_GNU_SOURCE
__build: $(LOGO-y)
--
2.25.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] tools: Stop re-defining -std= when building tools
2021-10-10 19:23 [PATCH] tools: Stop re-defining -std= when building tools Tom Rini
@ 2021-10-11 3:21 ` Bin Meng
2021-10-11 12:44 ` Tom Rini
0 siblings, 1 reply; 4+ messages in thread
From: Bin Meng @ 2021-10-11 3:21 UTC (permalink / raw)
To: Tom Rini; +Cc: U-Boot Mailing List
On Mon, Oct 11, 2021 at 3:23 AM Tom Rini <trini@konsulko.com> wrote:
>
> While we intentionally set -std=gnu11 for building host tools, and have
> for quite some time, we never dropped -std=gnu99 from tools/Makefile.
> This resulted in passing -std=gnu11 ... -std=gnu99 when building, and
> gnu99 would win. This in turn would result now in warnings such as:
> tools/mkeficapsule.c:25:15: warning: redefinition of typedef 'u32' is a C11 feature [-Wtypedef-redefinition]
> typedef __u32 u32;
> ^
>
> Signed-off-by: Tom Rini <trini@konsulko.com>
> ---
> tools/Makefile | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/tools/Makefile b/tools/Makefile
> index 999fd4653166..b45219e2c30c 100644
> --- a/tools/Makefile
> +++ b/tools/Makefile
> @@ -295,8 +295,7 @@ HOST_EXTRACFLAGS += -include $(srctree)/include/compiler.h \
> -I$(srctree)/tools \
> -DUSE_HOSTCC \
> -D__KERNEL_STRICT_NAMES \
> - -D_GNU_SOURCE \
> - -std=gnu99
> + -D_GNU_SOURCE
It looks like std=gnu11 is only added for Linux host.
KBUILD_HOSTCFLAGS += $(CSTD_FLAG)
Should we still keep it for other hosts?
Regards,
Bin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] tools: Stop re-defining -std= when building tools
2021-10-11 3:21 ` Bin Meng
@ 2021-10-11 12:44 ` Tom Rini
2021-10-11 15:11 ` Tom Rini
0 siblings, 1 reply; 4+ messages in thread
From: Tom Rini @ 2021-10-11 12:44 UTC (permalink / raw)
To: Bin Meng; +Cc: U-Boot Mailing List
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On Mon, Oct 11, 2021 at 11:21:49AM +0800, Bin Meng wrote:
> On Mon, Oct 11, 2021 at 3:23 AM Tom Rini <trini@konsulko.com> wrote:
> >
> > While we intentionally set -std=gnu11 for building host tools, and have
> > for quite some time, we never dropped -std=gnu99 from tools/Makefile.
> > This resulted in passing -std=gnu11 ... -std=gnu99 when building, and
> > gnu99 would win. This in turn would result now in warnings such as:
> > tools/mkeficapsule.c:25:15: warning: redefinition of typedef 'u32' is a C11 feature [-Wtypedef-redefinition]
> > typedef __u32 u32;
> > ^
> >
> > Signed-off-by: Tom Rini <trini@konsulko.com>
> > ---
> > tools/Makefile | 3 +--
> > 1 file changed, 1 insertion(+), 2 deletions(-)
> >
> > diff --git a/tools/Makefile b/tools/Makefile
> > index 999fd4653166..b45219e2c30c 100644
> > --- a/tools/Makefile
> > +++ b/tools/Makefile
> > @@ -295,8 +295,7 @@ HOST_EXTRACFLAGS += -include $(srctree)/include/compiler.h \
> > -I$(srctree)/tools \
> > -DUSE_HOSTCC \
> > -D__KERNEL_STRICT_NAMES \
> > - -D_GNU_SOURCE \
> > - -std=gnu99
> > + -D_GNU_SOURCE
>
> It looks like std=gnu11 is only added for Linux host.
>
> KBUILD_HOSTCFLAGS += $(CSTD_FLAG)
>
> Should we still keep it for other hosts?
Good question. Looking at the Linux kernel, we're of course vastly
diverged again at this point, but it always passes -std=gnu89 (because
hey, we demand a newer minimum than the kernel) unless it's a tool/test
that spells out something else. Given that Azure builds macOS and
cygwin for us, I'll see what happens when we tell everyone to use
-std=gnu11 and report back.
--
Tom
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] tools: Stop re-defining -std= when building tools
2021-10-11 12:44 ` Tom Rini
@ 2021-10-11 15:11 ` Tom Rini
0 siblings, 0 replies; 4+ messages in thread
From: Tom Rini @ 2021-10-11 15:11 UTC (permalink / raw)
To: Bin Meng; +Cc: U-Boot Mailing List
[-- Attachment #1: Type: text/plain, Size: 2556 bytes --]
On Mon, Oct 11, 2021 at 08:44:09AM -0400, Tom Rini wrote:
> On Mon, Oct 11, 2021 at 11:21:49AM +0800, Bin Meng wrote:
> > On Mon, Oct 11, 2021 at 3:23 AM Tom Rini <trini@konsulko.com> wrote:
> > >
> > > While we intentionally set -std=gnu11 for building host tools, and have
> > > for quite some time, we never dropped -std=gnu99 from tools/Makefile.
> > > This resulted in passing -std=gnu11 ... -std=gnu99 when building, and
> > > gnu99 would win. This in turn would result now in warnings such as:
> > > tools/mkeficapsule.c:25:15: warning: redefinition of typedef 'u32' is a C11 feature [-Wtypedef-redefinition]
> > > typedef __u32 u32;
> > > ^
> > >
> > > Signed-off-by: Tom Rini <trini@konsulko.com>
> > > ---
> > > tools/Makefile | 3 +--
> > > 1 file changed, 1 insertion(+), 2 deletions(-)
> > >
> > > diff --git a/tools/Makefile b/tools/Makefile
> > > index 999fd4653166..b45219e2c30c 100644
> > > --- a/tools/Makefile
> > > +++ b/tools/Makefile
> > > @@ -295,8 +295,7 @@ HOST_EXTRACFLAGS += -include $(srctree)/include/compiler.h \
> > > -I$(srctree)/tools \
> > > -DUSE_HOSTCC \
> > > -D__KERNEL_STRICT_NAMES \
> > > - -D_GNU_SOURCE \
> > > - -std=gnu99
> > > + -D_GNU_SOURCE
> >
> > It looks like std=gnu11 is only added for Linux host.
> >
> > KBUILD_HOSTCFLAGS += $(CSTD_FLAG)
> >
> > Should we still keep it for other hosts?
>
> Good question. Looking at the Linux kernel, we're of course vastly
> diverged again at this point, but it always passes -std=gnu89 (because
> hey, we demand a newer minimum than the kernel) unless it's a tool/test
> that spells out something else. Given that Azure builds macOS and
> cygwin for us, I'll see what happens when we tell everyone to use
> -std=gnu11 and report back.
The build completed:
https://dev.azure.com/u-boot/u-boot/_build/results?buildId=3024&view=results
and the interesting parts are:
https://dev.azure.com/u-boot/u-boot/_build/results?buildId=3024&view=logs&j=35e64860-b659-5ca1-bdf9-6e9833a3e679&t=17b0785b-bff7-569f-a47c-ec4f4762bca5
https://dev.azure.com/u-boot/u-boot/_build/results?buildId=3024&view=logs&j=54366476-fdb5-57fd-e8dc-672a8abc134d&t=4b05ba05-ad38-52b6-35d9-bb8255f5e2ea
In sum, we can use -std=gnu11 everywhere. There's warnings on these
hosts, but that's been true before this change:
https://dev.azure.com/u-boot/u-boot/_build/results?buildId=2991&view=results
Posting v2 in a moment.
--
Tom
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^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-10-10 19:23 [PATCH] tools: Stop re-defining -std= when building tools Tom Rini
2021-10-11 3:21 ` Bin Meng
2021-10-11 12:44 ` Tom Rini
2021-10-11 15:11 ` Tom Rini
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