https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100641
Bug ID: 100641
Summary: Link error when using extern thread_local variables on
AIX
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mfarazma.ext at gmail dot com
Target Milestone: ---
Declaring a variable as "extern thread_local" in a C++ program leads to:
"ERROR: Undefined symbol: TLS init function for ..." during linking.
To reproduce:
file `0.cc`:
```
extern thread_local int foo;
int main(){
return foo;
}
```
file `1.cc`:
```
thread_local int foo = 1;
```
Then compile with `g++ 0.cc 1.cc` which produces this error:
```
ld: 0711-317 ERROR: Undefined symbol: TLS init function for foo
ld: 0711-317 ERROR: Undefined symbol: .TLS init function for foo
ld: 0711-317 ERROR: Undefined symbol: __get_tpointer
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.
collect2: error: ld returned 8 exit status
```
