From: Rasmus Villemoes <rv@rasmusvillemoes.dk>
To: gcc-patches@gcc.gnu.org
Cc: Vagrant Cascadian <vagrant@debian.org>,
Jonathan Wakely <jwakely.gcc@gmail.com>,
Jakub Jelinek <jakub@redhat.com>,
Joseph Myers <joseph@codesourcery.com>, Jeff Law <law@redhat.com>
Subject: Re: [PATCH] gcc: honour -ffile-prefix-map in ASM_MAP [PR93371]
Date: Tue, 27 Sep 2022 08:54:48 +0200 [thread overview]
Message-ID: <49ad2c54-f179-3ef2-a0ce-85ec842da416@rasmusvillemoes.dk> (raw)
In-Reply-To: <d4ccd3cb-44ba-9bb5-c5ad-2de7c0981336@rasmusvillemoes.dk>
On 12/09/2022 11.46, Rasmus Villemoes wrote:
> On 29/08/2022 11.29, Rasmus Villemoes wrote:
>> -ffile-prefix-map is supposed to be a superset of -fmacro-prefix-map
>> and -fdebug-prefix-map. However, when building .S or .s files, gas is
>> not called with the appropriate --debug-prefix-map option when
>> -ffile-prefix-map is used.
>>
>> While the user can specify -fdebug-prefix-map when building assembly
>> files via gcc, it's more ergonomic to also support -ffile-prefix-map;
>> especially since for .S files that could contain the __FILE__ macro,
>> one would then also have to specify -fmacro-prefix-map.
>>
>> gcc:
>> PR driver/93371
>> * gcc.cc (ASM_MAP): Honour -ffile-prefix-map.
>> ---
>>
>> I've tested that this works as expected, both by looking at how gas is
>> now invoked, and by running 'strings' on the generated .o file. But I
>> don't know how to add something to the testsuite for this.
>
> Is this ok for trunk? If so, how about older maintained branches?
>
> And does anyone have ideas for how I could add a test case?
ping.
>
>>
>> I stumbled on this since it came up on the U-Boot mailing list:
>> https://lore.kernel.org/u-boot/4ed9f811-5244-54ef-b58e-83dba51510e4@prevas.dk/
>> .
>>
>> gcc/gcc.cc | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/gcc/gcc.cc b/gcc/gcc.cc
>> index b6d562a92f0..44eafc60187 100644
>> --- a/gcc/gcc.cc
>> +++ b/gcc/gcc.cc
>> @@ -878,7 +878,7 @@ proper position among the other output files. */
>> #endif
>>
>> #ifdef HAVE_AS_DEBUG_PREFIX_MAP
>> -#define ASM_MAP " %{fdebug-prefix-map=*:--debug-prefix-map %*}"
>> +#define ASM_MAP " %{ffile-prefix-map=*:--debug-prefix-map %*} %{fdebug-prefix-map=*:--debug-prefix-map %*}"
>> #else
>> #define ASM_MAP ""
>> #endif
>
next prev parent reply other threads:[~2022-09-27 6:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-29 9:29 Rasmus Villemoes
2022-09-12 9:46 ` Rasmus Villemoes
2022-09-27 6:54 ` Rasmus Villemoes [this message]
2022-10-17 10:00 ` Rasmus Villemoes
2022-11-01 20:11 ` Jeff Law
2022-11-02 12:35 ` Rasmus Villemoes
2022-11-02 15:45 ` Jeff Law
2022-11-03 13:29 ` Rasmus Villemoes
2022-11-16 3:50 ` Jeff Law
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