Re: [PING][PATCH][ARM]Use different startfile and endfile for elf target when generating shared object.

[Renlin Li <renlin dot li at foss dot arm dot com>]

~ Ping

https://gcc.gnu.org/ml/gcc-patches/2016-06/msg01227.html

Regards,
Renlin

On 14/12/16 15:33, Renlin Li wrote:
> Ping~
>
> Regards,
> Renlin
>
> On 16/06/16 12:04, Renlin Li wrote:
> > Hi all,
> >
> > GCC has startfile and endfile spec string built into it.
> > startfile is used to specify objects files to include at the start of the link process.
> > While endfile, on the other hand, is used to specify objects files to include at the end
> > of the link process.
> >
> > crtbegin.o is one of the object files specified by startfile spec string. IIUC,
> > crtbeginS.o should be used in place of crtbegin.o when generating shared objects.
> > The same applies to crtend.o which is one of the endfile. crtendS.o should be used when
> > generating shared objects.
> >
> > This patch makes the change to use different crtbegin and crtend files when creating
> > shared and static object for elf toolchain. The linux toolchain already did this
> > differentiation.
> >
> > So when the toolchain doesn't support shared object, the following error message will be
> > produced:
> > ld: cannot find crtbeginS.o: No such file or directory
> >
> > Still, those specs strings built into GCC can be overridden by using
> > -specs=command-line switch to specify a spec file.
> >
> > arm-none-eabi regression test without new issues, OK for trunk?
> >
> > Regards,
> > Renlin Li
> >
> > gcc/ChangeLog:
> >
> > 2016-06-16  Renlin Li  <renlin.li@arm.com>
> >
> >      * config/arm/unknown-elf.h (UNKNOWN_ELF_STARTFILE_SPEC): Use
> >      crtbeginS.o for shared object.
> >      (UNKNOWN_ELF_ENDFILE_SPEC): Use crtendS.o for shared object.