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Re: [BUG?] GCC 4.5.2 produces deprecated ARM relocation
- From: Richard Earnshaw <rearnsha at arm dot com>
- To: Nick Clifton <nickc at redhat dot com>
- Cc: Ben Gamari <bgamari dot foss at gmail dot com>, "binutils at sourceware dot org" <binutils at sourceware dot org>
- Date: Wed, 26 Oct 2011 10:57:29 +0100
- Subject: Re: [BUG?] GCC 4.5.2 produces deprecated ARM relocation
- References: <firstname.lastname@example.org> <4EA57E62.email@example.com>
On 24/10/11 16:04, Nick Clifton wrote:
> Hi Ben,
>> To my
>> surprise, I found that the compiler instead produced the deprecated
>> R_ARM_PLT32 relocation. Considering the deprecated state of this
>> relocation type, should this be considered a bug?
>> Being a linker
>> implementer, I for one would greatly appreciate it if GCC tried to only
>> use non-deprecated relocation types.
> And so you will need to repost this bug report to the gcc bug mailing
> list, since it is gcc's fault...
> What is happening is that GCC is producing this assembler output for the
> call to hi():
> bl hi(PLT)
> The presence of the "(PLT)" instructs GAS to produce the deprecated
> ARM_PLT32 reloc. (See the ARM specific portion of the GAS documentation
> for a mention of this).
> GCC is adding this suffix because the -fPIC flag enables NEED_PLT_RELOC
> (see gcc/config/arm/elf.h). Why elf.h is doing this I am not sure -
> backwards compatibility maybe ? Anyway it is GCC that needs fixing, not
I disagree, gas should just ignore the suffix when generating EABI