Fwd: [rtems commit] or1k/generic_or1k: Add per-section compilation and linking support

[Gedare Bloom]

---------- Forwarded message ----------
From: Hesham Almatary <heshamelmatary at gmail.com>
Date: Fri, Apr 1, 2016 at 8:45 PM
Subject: Re: [rtems commit] or1k/generic_or1k: Add per-section
compilation and linking support
To: vc at rtems.org
Cc: Stefan Wallentowitz <stefan at wallentowitz.de>


hello and ticker fail to run with this commit.

On Sat, Mar 12, 2016 at 7:14 AM Joel Sherrill <joel at rtems.org> wrote:
>
> Module:    rtems
> Branch:    master
> Commit:    e1768fdd950fb24004183cdfdbef0bcd1a07908c
> Changeset: http://git.rtems.org/rtems/commit/?id=e1768fdd950fb24004183cdfdbef0bcd1a07908c
>
> Author:    Joel Sherrill <joel at rtems.org>
> Date:      Thu Mar 10 16:28:12 2016 -0600
>
> or1k/generic_or1k: Add per-section compilation and linking support
>
> updates #2577.
>
> For the generic_or1k BSP variant without this option sample
> executables sizes were as follows:
>
>    text    data     bss           dec             hex   filename
>  255044    1780 33297600        33554424        1fffff8 ticker.exe
>  188484    1496 33364448        33554428        1fffffc minimum.exe
>  829728   77432 32647264        33554424        1fffff8 cxx_iostream.exe
> 1110588    6112 32437728        33554428        1fffffc fileio.exe
>  881676   14420 32658304        33554400        1ffffe0 pppd.exe
>  428200    2556 33123648        33554404        1ffffe4 capture.exe
>  274012    1868 33278528        33554408        1ffffe8 nsecs.exe
>  398084    2184 33154144        33554412        1ffffec paranoia.exe
>  387348    7420 33159648        33554416        1fffff0 cdtest.exe
>  247752    1780 33304896        33554428        1fffffc base_sp.exe
>  253888    1808 33298720        33554416        1fffff0 unlimited.exe
>  261792    1752 33290880        33554424        1fffff8 hello.exe
>  569612    6792 32978016        33554420        1fffff4 loopback.exe
>
> For the generic_or1k BSP variant with this option sample executables
> sizes were as follows:
>
>    text    data     bss           dec             hex   filename
>  229804    1760 33314592        33546156        1ffdfac ticker.exe
>  118744    1424 33425984        33546152        1ffdfa8 minimum.exe
>  607344   29188 32909632        33546164        1ffdfb4 cxx_iostream.exe
> 1064124    6088 32475936        33546148        1ffdfa4 fileio.exe
>  801832   14156 32730176        33546164        1ffdfb4 pppd.exe
>  392908    2508 33150752        33546168        1ffdfb8 capture.exe
>  249932    1848 33294368        33546148        1ffdfa4 nsecs.exe
>  372320    2164 33171680        33546164        1ffdfb4 paranoia.exe
>  361148    6980 33178016        33546144        1ffdfa0 cdtest.exe
>  222004    1760 33322400        33546164        1ffdfb4 base_sp.exe
>  222812    1772 33321568        33546152        1ffdfa8 unlimited.exe
>  229764    1704 33314688        33546156        1ffdfac hello.exe
>  515572    6576 33024000        33546148        1ffdfa4 loopback.exe
>
> ---
>
>  c/src/lib/libbsp/or1k/generic_or1k/make/custom/generic_or1k.cfg | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/c/src/lib/libbsp/or1k/generic_or1k/make/custom/generic_or1k.cfg b/c/src/lib/libbsp/or1k/generic_or1k/make/custom/generic_or1k.cfg
> index fff00ae..9a00643 100644
> --- a/c/src/lib/libbsp/or1k/generic_or1k/make/custom/generic_or1k.cfg
> +++ b/c/src/lib/libbsp/or1k/generic_or1k/make/custom/generic_or1k.cfg
> @@ -5,3 +5,6 @@ RTEMS_CPU = or1k
>  CPU_CFLAGS = -O2
>
>  CFLAGS_OPTIMIZE_V ?= -O0 -g
> +CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
> +
> +LDFLAGS = -Wl,--gc-sections
>
> _______________________________________________
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> vc at rtems.org
> http://lists.rtems.org/mailman/listinfo/vc


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