> On Sep 13, 2020, at 12:51 PM, Ben Hutchings <ben@xxxxxxxxxxxxxxx> wrote: > > Enabling CONFIG_RD_ZSTD (which is enabled by default) resulted in a > link failure on ia64: > > + ld -r -o vmlinux.o --whole-archive arch/ia64/kernel/head.o init/built-in.a usr/built-in.a arch/ia64/kernel/built-in.a arch/ia64/mm/built-in.a kernel/built-in.a certs/built-in.a mm/built-in.a fs/built-in.a ipc/built-in.a security/built-in.a crypto/built-in.a block/built-in.a lib/built-in.a arch/ia64/lib/built-in.a lib/lib.a arch/ia64/lib/lib.a drivers/built-in.a sound/built-in.a net/built-in.a virt/built-in.a arch/ia64/pci/built-in.a arch/ia64/hp/common/built-in.a --no-whole-archive --start-group --end-group > ld: lib/zstd/entropy_common.o: linking constant-gp files with non-constant-gp files > ld: failed to merge target specific data of file lib/zstd/entropy_common.o > ld: lib/zstd/fse_decompress.o: linking constant-gp files with non-constant-gp files > ld: failed to merge target specific data of file lib/zstd/fse_decompress.o > ld: lib/zstd/zstd_common.o: linking constant-gp files with non-constant-gp files > ld: failed to merge target specific data of file lib/zstd/zstd_common.o I’ve never seen anything like this error before. I did some searching, and found that it may show up if an object file is empty. These three files are all included in both the zstd_compress and the zstd_decompress modules. We used to exclude these 3 files from the zstd_decompress module when both modules are built-in. But then commit dc35da16a2e2 [0] removed that, because Kbuild is supposed to handle that case. If you revert commit dc35da16a2e2 [0] does that fix the issue? I’m attempting to build with IA64, and I’ll let you know if I am able to reproduce the issue and test if this fixes it. CC: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> author of the commit and the linux-kbuild mailing list. [0] https://github.com/torvalds/linux/commit/dc35da16a2e23db04822f0129cd5b28b7b0e72b4 Best, Nick > This is seen on Debian unstable, with gcc 10.2 and binutils 2.35. A > full build log is available at: > https://buildd.debian.org/status/fetch.php?pkg=linux&arch=ia64&ver=5.9~rc4-1~exp1&stamp=1599955166&raw=1 > > Ben. > > -- > Ben Hutchings > Humour is the best antidote to reality. >
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