[PATCH] nm: Remove --with-symbol-versions

[H.J. Lu]

On Wed, Aug 12, 2020 at 10:42 PM Fangrui Song <i@maskray.me> wrote:
>
> On 2020-08-12, H.J. Lu wrote:
> >On Wed, Aug 12, 2020 at 7:42 PM Fangrui Song <i@maskray.me> wrote:
> >>
> >> "bfd: Display symbol version for nm -D" has a minor problem: an
> >> undefined symbol (e.g. strlen@GLIBC_2.2.5 in cat) should use one @,
> >> instead of two @@. nm -D output is currently inconsistent with readelf -Ws's
> >> output and ld -y's behavior.
> >>
> >
> >nm -D is consistent with readelf -sW and nm:
> >
> >[hjl@gnu-cfl-2 tmp]$ cat x.c
> >#include <stdio.h>
> >
> >void
> >foo (void)
> >{
> >  printf ("foo\n");
> >}
> >[hjl@gnu-cfl-2 tmp]$ gcc -shared -fPIC x.c
> >[hjl@gnu-cfl-2 tmp]$ readelf -sW a.out | grep UND | grep @@
> >    47: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND puts@@GLIBC_2.2.5
> >    51: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND
> >__cxa_finalize@@GLIBC_2.2.5
> >[hjl@gnu-cfl-2 tmp]$ nm a.out | grep " U "  | grep @@
> >                 U puts@@GLIBC_2.2.5
> >[hjl@gnu-cfl-2 tmp]$ nm -D a.out | grep " U "  | grep @@
> >                 U puts@@GLIBC_2.2.5
> >[hjl@gnu-cfl-2 tmp]$
> >
> >But readelf --dyn-syms only displays a single @
>
> puts@GLIBC_2.2.5 in .dynsym (st_name concatenated with the version string in
> .gnu.version_r) and puts@@GLIBC_2.2.5 in .symtab (st_name).  This looks like
> another minor thing which should be fixed in ld.
>
> Version strings in VERNEED should use a single @.

I opened:

https://sourceware.org/bugzilla/show_bug.cgi?id=26382

-- 
H.J.