Re: [OE-core] [SDK] How to use the gold linker

["Khem Raj" <raj.khem@gmail.com>]

On 12/15/20 8:50 AM, Christopher Larson wrote:
> This can be fixed via two changes, first removing real-ld, then adding 
> the missing links to fix -fuse-ld=. I have this in one of my 
> not-yet-submitted bbappends:
> 
>      # Remove real-ld, as it prevents checking for ld or gold in the 
> search path
>      rm -f ${dest}real-ld$suffix
>      # Then add links to fix builds with -fuse-ld=
>      ln -sf ${BINRELPATH}/${TARGET_PREFIX}ld.gold$suffix 
> ${dest}ld.gold$suffix
>      ln -sf ${BINRELPATH}/${TARGET_PREFIX}ld.bfd$suffix ${dest}ld.bfd$suffix
> 

right this looks ok. Can you submit this for upstreaming please

> On Mon, Dec 14, 2020 at 3:09 PM Khem Raj <raj.khem@gmail.com 
> <mailto:raj.khem@gmail.com>> wrote:
> 
> 
> 
>     On 12/14/20 3:14 AM, Christian Eggers wrote:
>      > Branch: dunfell
>      > Arch: arm
>      >
>      > When I set -fuse-ld=gold with the Yocto SDK, the bfd linker is
>     used anyway:
>      >
>      >> .
>     /opt/poky-tiny/3.1.4/environment-setup-cortexa7t2hf-neon-vfpv4-poky-linux-musleabi
>      >> ${CC} -fuse-ld=gold -Wl,--threads -o test test.c
>      >
>     /opt/poky-tiny/3.1.4/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/9.3.0/real-ld:
>     unrecognized option '--threads'
>      >
>     /opt/poky-tiny/3.1.4/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/9.3.0/real-ld:
>     use the --help option for usage information
>      >
>      > When I call the "real-ld" with -h, I can see that it's the BFD
>     linker.
>      >
>      >> ${CC} -print-prog-name=ld
>      >
>     /opt/poky-tiny/3.1.4/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/9.3.0/ld
>      >
>      >> ${CC} -fuse-ld=bfd -print-prog-name=ld
>      > ld.bfd
>      >
>      >> ${CC} -fuse-ld=gold -print-prog-name=ld
>      > ld.gold
>      >
>      > Compared to other cross toolchains I use, the output of the
>     previous two commands
>      > miss the full path to the linker. The gold linker is part of my SDK:
>      >
>      >> arm-poky-linux-musleabi-ld.gold --help
>      > Usage: arm-poky-linux-musleabi-ld.gold [options] file...
>      > Options:
>      >    --help                      Report usage information
>      > ...
>      >
>      > How can I use the gold linker from gcc (without making it default)?
>      >
> 
>     This is kind of known and kind of works as intended, see
>     https://git.openembedded.org/openembedded-core/tree/meta/recipes-devtools/gcc/gcc-cross-canadian.inc#n132
>     <https://git.openembedded.org/openembedded-core/tree/meta/recipes-devtools/gcc/gcc-cross-canadian.inc#n132>
> 
>     You might want to try commenting it out and see if it works for you in
>     resulting SDK
>      > regards
>      > Christian
>      >
>      >
>      >
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> Christopher Larson
> kergoth at gmail dot com
> Founder - BitBake, OpenEmbedded, OpenZaurus
> Senior Software Engineer, Mentor Graphics