[PATCH] Add startswith function and use it instead of CONST_STRNEQ.

[Mike Frysinger]

On 25 Mar 2021 16:47, Luis Machado wrote:
> On 3/25/21 8:54 AM, Alan Modra wrote:
> > On Thu, Mar 25, 2021 at 07:53:04AM -0300, Luis Machado wrote:
> >> On 3/22/21 7:56 PM, Alan Modra wrote:
> >>> On Mon, Mar 22, 2021 at 01:13:00PM -0300, Luis Machado wrote:
> >>>> Just FTR, I'm seeing breakage in sim/aarch64 and sim/arm. Both are
> >>>> complaining about "-Werror=implicit-function-declaration" regarding strncmp
> >>>> and strlen.
> >>>>
> >>>> Is this the breakage you're talking about? Just so I know what to expect
> >>>> when it gets fixed.
> >>>
> >>> Yes.
> >>>
> >>
> >> Thanks. Are there plans to address this or should I come up with a patch?
> > 
> > I posted a patch here
> > https://sourceware.org/pipermail/binutils/2021-March/115863.html
> > It's been tested with gdb, sim and binutils builds.
> > 
> > Tom offered to solve the problem himself, so I'm waiting on that or
> > for someone in the gdb camp to review my patch.  Since I messed this
> > up in the first place by taking a comment by Tom as a go-ahead rather
> > than first posting a patch for proper review by gdb maintainers, I'm
> > being a little cautious in committing the above patch.
> > 
> 
> I applied the above patch to today's master binutils-gdb and gave 
> configure's --enable-targets=all a try, but I ran into the following:
> 
> In file included from ../../../repos/binutils-gdb/bfd/archive.c:135:
> ./bfd.h:568:1: error: redefinition of ‘startswith’
>    568 | startswith (const char *str, const char *prefix)
>        | ^~~~~~~~~~
> In file included from ../../../repos/binutils-gdb/bfd/sysdep.h:122,
>                   from ../../../repos/binutils-gdb/bfd/archive.c:134:
> ../../../repos/binutils-gdb/bfd/../include/str-util.h:23:1: note: 
> previous definition of ‘startswith’ was here
>     23 | startswith (const char *str, const char *prefix)
>        | ^~~~~~~~~~

Alan's patch didn't include the regenerated bfd.h inputs, so you'll
have to do that on your side.
-mike