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
Description: GNU Zip compressed data
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