[LLVMdev] Enabling the gold linker on freebsd

[Rafael Espíndola]

Two options:

* Try passing -fuse-ld=gold to clang.
* have 'ld' be a symlink to ld.gold.

Cheers,
Rafael



On 22 June 2015 at 04:02, Aditya Verma <aditya.verma.cse12 at iitbhu.ac.in> wrote:
>
> I have been trying to enable the gold linker on FreeBSD to use the link time
> optimizations. I made gold from the binutils under /usr/ports. After
> building binutils using make -k install clean i got ld under /usr/bin and in
> the directory /usr/local/bin i got ld, ld.gold and ld.bfd.
>
> Now while trying to use link time optimization for the simple example
> programs herehttp://llvm.org/docs/GoldPlugin.html (a.c and b.c under the
> heading 'Examples of Link Time Optimization') i entered the four commands as
> follows:
>
> clang -flto a.c -c -o a.o
> ar q a.a a.o
> clang b.c -c -o b.o
> clang -flto a.a b.o -o main
>
> I got the following error:
>
> usr/bin/ld: unrecogonized option '-plugin'
> usr/bin/ld: use the --help option for usage information
> clang: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
> Is there the problem with the linker that ld.gold is not being called.
> Should I replace the ld with ld.gold? Does the linker looks in the right
> directiry for the .so plugins?
>
> The LLVMgold.so and libLTO.so shared objects are in the directory
> /usr/local/llvm-devel/lib/. I cannot find the directory where clang is
> installed. I am not sure where to make the bfd-plugins directory and add the
> symlinks to LLVMgold.so and libLTO.so.
>
> I am using freebsd 10.1 release. How to enable the gold linker for link time
> optimizations? also how can I enable it to be the default linker?
>
>
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