[Bug ld/28243] New: ld: Assigning a non-default symbol to a different version node should warn

[i at maskray dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=28243

            Bug ID: 28243
           Summary: ld: Assigning a non-default symbol to a different
                    version node should warn
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: i at maskray dot me
  Target Milestone: ---

cat > ./a.s <<eof
.symver foo, foo@v1
.globl foo
foo:
eof

cat > ./ver <<eof
v1 {};
v2 { foo; };
eof

# Note that v2 { foo; } is ignored.
ld/ld-new -shared --version-script=ver a.o -o a.so

.dynsym has foo@v1.
This is error-prone and it'd be nice to report a warning.

(The gold output has both foo@v1 and foo@@v2. You might call it a bug because
you consider GNU ld the standard, but I'll insist that it's the design flaw of
the assembler @ syntax.
Linkers wouldn't need indirection complexity or combining version complexity if
the ",remove" semantics were used in the beginning.)

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