https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91376
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |WAITING
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #6)
> Good, then let me take a look.
So I've just tested current master of binutils and I can see:
marxin@marxinbox:/tmp> gcc --version
gcc (GCC) 10.0.0 20190806 (experimental)
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
marxin@marxinbox:/tmp> gcc -c -flto main.c
$ nm main.o
nm: main.o: plugin needed to handle lto object
0000000000000001 C __gnu_lto_slim
The issue here is that the installed nm can't load plugin from bfd-plugins:
$ strace -f -s512 nm main.o 2>&1 | grep plugin
openat(AT_FDCWD, "/home/marxin/bin/binutils/bin/../bin/../lib/bfd-plugins",
O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4
stat("/home/marxin/bin/binutils/bin/../bin/../lib/bfd-plugins/..",
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/home/marxin/bin/binutils/bin/../bin/../lib/bfd-plugins/.",
{st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
write(2, "main.o: plugin needed to handle lto object", 42main.o: plugin needed
to handle lto object) = 42
$ nm --plugin /dev/shm/objdir/lto-plugin/.libs/liblto_plugin.so.0.0.0 main.o
00000000 T main
So the question is if you have a LTO plugin accessible for the built gold or
nm?
