https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93195
Bug ID: 93195
Summary: -fpatchable-function-entries :
__patchable_function_entries should consider comdat
groups
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: i at maskray dot me
Target Milestone: ---
% cat a.cc
inline void foo() {}
void bar() { foo(); }
% cat b.cc
inline void foo() {}
void bar1() { foo(); }
% g++ -fpatchable-function-entry=1 -c a.cc b.cc
Linkers don't allow a relocation to a discarded symbol (foo).
% ld.bfd a.o b.o
...
`.text._Z3foov' referenced in section `__patchable_function_entries' of b.o:
defined in discarded section `.text._Z3foov[_Z3foov]' of b.o
% gold a.o b.o
b.o(__patchable_function_entries+0x0): error: relocation refers to local symbol
"" [5], which is defined in a discarded section
section group signature: "_Z3foov"
prevailing definition is from a.o
% ld.lld a.o b.o
ld.lld: error: relocation refers to a discarded section: .text._Z3foov
>>> defined in b.o
>>> referenced by b.cc
>>> b.o:(__patchable_function_entries+0x0)
