Re: v850 ld failure for v850-rtems on master

[Joel Sherrill <joel dot sherrill at oarcorp dot com>]

On 3/21/2016 1:16 PM, Joel Sherrill wrote:
> On 3/21/2016 12:52 PM, Nick Clifton wrote:
> > Hi Joel,
> >
> > > v850-rtems4.12-gcc -B../../../../../v850e1sim/lib/ -specs bsp_specs -qrtems -DHAVE_CONFIG_H -I. -I../../../../../../../rtems/c/src/../../testsuites/samples/hello -I..     -mv850e1 -O2 -g -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs -MT init.o -MD -MP -MF .deps/init.Tpo -c -o init.o ../../../../../../../rtems/c/src/../../testsuites/samples/hello/init.c
> > > mv -f .deps/init.Tpo .deps/init.Po
> > > v850-rtems4.12-gcc -B../../../../../v850e1sim/lib/ -specs bsp_specs -qrtems -mv850e1 -O2 -g -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs  -Wl,--gc-sections  -mv850e1   -o hello.exe init.o
> > > /data/home/joel/test-gcc/install-head/bin/../lib/gcc/v850-rtems4.12/6.0.0/../../../../v850-rtems4.12/bin/ld: cannot represent machine `v850-rh850'
> >
> > > Any ideas what might have broken?
> >
> > I cannot reproduce this, but I do not have an RTEMS system (or an RTEMS sysroot)
> > so that is not surprising.
>
> RTEMS is always cross built so it is like CPU-elf from a tools
> building perspective. Basic one-tree style build.
>
> But this failure required getting far enough to build RTEMS
> and a BSP. Each BSP has its own linker script and you pointed
> me at the problem below.
>
> > I suspect that it might have something to do with
> > this patch:
> >
> >     2016-03-09  Pedro Alves  <palves@redhat.com>
> >
> > 	* cpu-v850.c (N): Append ":old-gcc-abi" instead of " (using old
> > 	gcc ABI)" to printable name.
> > 	* cpu-v850_rh850.c (bfd_v850_rh850_arch): Use "v850:rh850" instead
> > 	of "v850-rh850" as printable name.
> >
> > Which is from:
> >
> > https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=4b05e0a74b3fb21b56e821423b8a334e4be9cfe7
>
> Thanks. We have our own linker scripts and that change appears to be the
> breakage. This is the short version of what I had to change on our side.
>
> -OUTPUT_ARCH(v850-rh850)
> +OUTPUT_ARCH(v850:rh850)

Will this continue to work with binutils from before this change?

I realized this might make for a tools version hiccup for us.

> Good reason to periodically check against master and report. :)
>
> Thanks.
>
> --joel
>
> > Cheers
> >     Nick