You need to use gcc-ar wrappers when creating the archive in the first place.
Thanks,
Andrew
> On May 26, 2014, at 3:19 AM, "Bernhard Rosenkränzer"
> <bernhard.rosenkran...@linaro.org> wrote:
>
> Hi,
> I've run into some compile errors after updating to 4.9 -- usually getting
> undefined references to symbols defined in helper static libraries.
>
> It turns out this is triggered by gcc -flto now creating slim object files by
> default (-ffat-lto-objects "fixes" it) - but I think it is actually an ld bug
> that should be fixed at some point. ld (regardless of whether I use
> -fuse-linker-plugin, -fuse-ld=gold or -fuse-ld=bfd) doesn't seem to see LTO
> bytecode in object files that are inside an ar wrapper.
> It deals with the library just fine if I use "ar x" to extract its object
> files and link to them individually as opposed to the .a file.
>
> I've attached a small test case to demonstrate ("make broken" shows the
> error, "make works" shows the workaround).
>
> Is there any reason why ld should behave the way it does, or is this a bug
> that needs fixing?
>
> ttyl
> bero
> <ltotest.tar.gz>
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