* [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS.
@ 2021-04-30 18:28 Khem Raj
2021-04-30 19:08 ` Khem Raj
0 siblings, 1 reply; 7+ messages in thread
From: Khem Raj @ 2021-04-30 18:28 UTC (permalink / raw)
To: libc-alpha
-ffile-prefix-map could be used as superset to imply -fdebug-prefix-map
as well, therefore it should be propagated too, so cases when
-ffile-prefix-map is used but -fdebug-prefix-map is not, then it should
still rewire the paths in debug info
---
Makeconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Makeconfig b/Makeconfig
index 01f8638c2e..5a675e20e3 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -1067,7 +1067,7 @@ endif
# The assembler can generate debug information too.
ifndef ASFLAGS
-ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
+ASFLAGS := $(filter -g% -ffile-prefix-map=% -fdebug-prefix-map=%,$(CFLAGS))
endif
override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
--
2.31.1
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS.
2021-04-30 18:28 [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS Khem Raj
@ 2021-04-30 19:08 ` Khem Raj
2021-04-30 19:22 ` Khem Raj
2021-05-01 7:26 ` Florian Weimer
0 siblings, 2 replies; 7+ messages in thread
From: Khem Raj @ 2021-04-30 19:08 UTC (permalink / raw)
To: GNU C Library
On Fri, Apr 30, 2021 at 11:28 AM Khem Raj <raj.khem@gmail.com> wrote:
>
> -ffile-prefix-map could be used as superset to imply -fdebug-prefix-map
> as well, therefore it should be propagated too, so cases when
> -ffile-prefix-map is used but -fdebug-prefix-map is not, then it should
> still rewire the paths in debug info
hmm noticed that when I remove -fdebug-prefix-map then
-ffile-prefix-map did not work and its because GCC is not
translating -ffile-prefix-map to equivalent assembler option
--debug-prefix-map like it does for -fdebug-prefix-map
it seems a bug in GCC driver.
> ---
> Makeconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Makeconfig b/Makeconfig
> index 01f8638c2e..5a675e20e3 100644
> --- a/Makeconfig
> +++ b/Makeconfig
> @@ -1067,7 +1067,7 @@ endif
>
> # The assembler can generate debug information too.
> ifndef ASFLAGS
> -ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
> +ASFLAGS := $(filter -g% -ffile-prefix-map=% -fdebug-prefix-map=%,$(CFLAGS))
> endif
> override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
>
> --
> 2.31.1
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS.
2021-04-30 19:08 ` Khem Raj
@ 2021-04-30 19:22 ` Khem Raj
2021-05-01 7:26 ` Florian Weimer
1 sibling, 0 replies; 7+ messages in thread
From: Khem Raj @ 2021-04-30 19:22 UTC (permalink / raw)
To: GNU C Library
On Fri, Apr 30, 2021 at 12:08 PM Khem Raj <raj.khem@gmail.com> wrote:
>
> On Fri, Apr 30, 2021 at 11:28 AM Khem Raj <raj.khem@gmail.com> wrote:
> >
> > -ffile-prefix-map could be used as superset to imply -fdebug-prefix-map
> > as well, therefore it should be propagated too, so cases when
> > -ffile-prefix-map is used but -fdebug-prefix-map is not, then it should
> > still rewire the paths in debug info
>
> hmm noticed that when I remove -fdebug-prefix-map then
> -ffile-prefix-map did not work and its because GCC is not
> translating -ffile-prefix-map to equivalent assembler option
> --debug-prefix-map like it does for -fdebug-prefix-map
> it seems a bug in GCC driver.
infact there already is a bug for gcc driver for this
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93371
>
> > ---
> > Makeconfig | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/Makeconfig b/Makeconfig
> > index 01f8638c2e..5a675e20e3 100644
> > --- a/Makeconfig
> > +++ b/Makeconfig
> > @@ -1067,7 +1067,7 @@ endif
> >
> > # The assembler can generate debug information too.
> > ifndef ASFLAGS
> > -ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
> > +ASFLAGS := $(filter -g% -ffile-prefix-map=% -fdebug-prefix-map=%,$(CFLAGS))
> > endif
> > override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
> >
> > --
> > 2.31.1
> >
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS.
2021-04-30 19:08 ` Khem Raj
2021-04-30 19:22 ` Khem Raj
@ 2021-05-01 7:26 ` Florian Weimer
2021-05-01 13:26 ` Khem Raj
1 sibling, 1 reply; 7+ messages in thread
From: Florian Weimer @ 2021-05-01 7:26 UTC (permalink / raw)
To: Khem Raj via Libc-alpha
* Khem Raj via Libc-alpha:
> On Fri, Apr 30, 2021 at 11:28 AM Khem Raj <raj.khem@gmail.com> wrote:
>>
>> -ffile-prefix-map could be used as superset to imply -fdebug-prefix-map
>> as well, therefore it should be propagated too, so cases when
>> -ffile-prefix-map is used but -fdebug-prefix-map is not, then it should
>> still rewire the paths in debug info
>
> hmm noticed that when I remove -fdebug-prefix-map then
> -ffile-prefix-map did not work and its because GCC is not
> translating -ffile-prefix-map to equivalent assembler option
> --debug-prefix-map like it does for -fdebug-prefix-map
> it seems a bug in GCC driver.
I haven't look at the patch in detail. Does the above mean you withdraw
it?
Thanks,
Florian
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS.
2021-05-01 7:26 ` Florian Weimer
@ 2021-05-01 13:26 ` Khem Raj
2021-05-01 13:38 ` Florian Weimer
0 siblings, 1 reply; 7+ messages in thread
From: Khem Raj @ 2021-05-01 13:26 UTC (permalink / raw)
To: Florian Weimer; +Cc: Khem Raj via Libc-alpha
On Sat, May 1, 2021 at 12:26 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * Khem Raj via Libc-alpha:
>
> > On Fri, Apr 30, 2021 at 11:28 AM Khem Raj <raj.khem@gmail.com> wrote:
> >>
> >> -ffile-prefix-map could be used as superset to imply -fdebug-prefix-map
> >> as well, therefore it should be propagated too, so cases when
> >> -ffile-prefix-map is used but -fdebug-prefix-map is not, then it should
> >> still rewire the paths in debug info
> >
> > hmm noticed that when I remove -fdebug-prefix-map then
> > -ffile-prefix-map did not work and its because GCC is not
> > translating -ffile-prefix-map to equivalent assembler option
> > --debug-prefix-map like it does for -fdebug-prefix-map
> > it seems a bug in GCC driver.
>
> I haven't look at the patch in detail. Does the above mean you withdraw
> it?
I think it wont be effective unless gcc bug is fixed. So it can be applied or
we can wait for gcc to be fixed.
>
> Thanks,
> Florian
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS.
2021-05-01 13:26 ` Khem Raj
@ 2021-05-01 13:38 ` Florian Weimer
2021-05-01 17:50 ` Khem Raj
0 siblings, 1 reply; 7+ messages in thread
From: Florian Weimer @ 2021-05-01 13:38 UTC (permalink / raw)
To: Khem Raj; +Cc: Khem Raj via Libc-alpha
* Khem Raj:
> I think it wont be effective unless gcc bug is fixed. So it can be applied or
> we can wait for gcc to be fixed.
Let's wait for the GCC fix, in case it takes a different shape.
Thanks,
Florian
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS.
2021-05-01 13:38 ` Florian Weimer
@ 2021-05-01 17:50 ` Khem Raj
0 siblings, 0 replies; 7+ messages in thread
From: Khem Raj @ 2021-05-01 17:50 UTC (permalink / raw)
To: Florian Weimer; +Cc: Khem Raj via Libc-alpha
On Sat, May 1, 2021 at 6:38 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * Khem Raj:
>
> > I think it wont be effective unless gcc bug is fixed. So it can be applied or
> > we can wait for gcc to be fixed.
>
> Let's wait for the GCC fix, in case it takes a different shape.
>
sounds good.
> Thanks,
> Florian
>
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2021-05-01 17:50 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2021-04-30 18:28 [PATCH] Propagate -ffile-prefix-map from CFLAGS to ASFLAGS Khem Raj
2021-04-30 19:08 ` Khem Raj
2021-04-30 19:22 ` Khem Raj
2021-05-01 7:26 ` Florian Weimer
2021-05-01 13:26 ` Khem Raj
2021-05-01 13:38 ` Florian Weimer
2021-05-01 17:50 ` Khem Raj
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