https://sourceware.org/bugzilla/show_bug.cgi?id=26979
Bug ID: 26979
Summary: Visibility of undefined foo@v1 should constrain
defined foo@@v1
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 > ./def1.s <<eof
.globl foo
.symver foo, foo@@@v1
foo:
eof
cat > ./ref1.s <<eof
.protected foo_v1
.symver foo_v1, foo@v1
call foo_v1
eof
cat > ./ver <<eof
v1 {};
eof
gcc -c *.s
% ld.bfd -shared --version-script=ver ref1.o def1.o
Symbol table '.dynsym' contains 3 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000000000 0 OBJECT GLOBAL DEFAULT ABS v1
2: 0000000000001025 0 NOTYPE GLOBAL DEFAULT 9 foo@@v1
% gold -shared --version-script=ver ref1.o def1.o
Symbol table '.dynsym' contains 6 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
1: 0000000000002000 0 NOTYPE GLOBAL DEFAULT 8 _end
2: 0000000000002000 0 NOTYPE GLOBAL DEFAULT 8 _edata
3: 00000000000002bd 0 NOTYPE GLOBAL PROTECTED 7 foo@@v1
4: 0000000000002000 0 NOTYPE GLOBAL DEFAULT 8 __bss_start
5: 0000000000000000 0 OBJECT GLOBAL DEFAULT ABS v1
The gold behavior is more sensible: the visibility of the output foo@@v1 is
changed to STV_PROTECTED. Note, if def1.s defines the non-default version
foo@v1 instead, both GNU ld and gold produce a protected foo@v1.
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