On Mon, 25 Aug 2008, Ingo Molnar wrote:
>
> * Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> > Hi all,
> >
> > Today's linux-next build (x86_64 allmodconfig) failed like this:
> >
> > x86_64-unknown-linux-gnu-objcopy: unrecognized option `--globalize-symbol'
> >
> > Introduced by commit 46483cdbb5dc06d84d9572bac1b90f6744c7fc95 ("ftrace:
> > create __mcount_loc section").
> >
> > The currently documented minimum requirements for binutils is 2.12.
> >
> > $ x86_64-unknown-linux-gnu-objcopy --version
> > GNU objcopy 2.16.1
> >
> > For now I have reverted commit c2ffd56692cc4b762c175fad69b70a4ec0dfca3f
> > ("ftrace: enable using mcount recording on x86") since that is the least
> > intrusive thing to do and the above change depends on
> > CONFIG_FTRACE_MCOUNT_RECORD.
>
> ok. The binutils i've used for testing is 2.18 and this is indeed a new
> option since 2.17. Steve?
Ouch! I didn't realize that.
OK, I can test to see if objdump is >= version 2.18 and if it is not, I
can simply not mark those functions. The current mcount for MCOUNT_RECORD
is simply a "ret". No saving of registers or anything.
-- Steve
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