https://sourceware.org/bugzilla/show_bug.cgi?id=16846
Bug ID: 16846
Summary: LTO mismatched TLS reference
Product: binutils
Version: 2.25 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: lukasz.kwestarz at luxoo dot pl
xfd@Parnik:/build$ cat foo.c
__thread int foo;
xfd@Parnik:/build$ cat bar.c
extern __thread int foo;
int bar()
{
return foo;
}
xfd@Parnik:/build$ cat main.c
extern int bar();
int main ()
{
return bar();
}
gcc -c foo.c
gcc -flto -c bar.c
gcc -flto main.c -o main bar.o foo.o <- no error
gcc -flto main.c -o main foo.o bar.o
/usr/bin/ld: foo: TLS definition in foo.o section .tbss mismatches non-TLS
reference in bar.o (symbol from plugin)
bar.o (symbol from plugin): could not read symbols: Bad value
collect2: ld returned 1 exit status
I think problem is caused by missing or clause for new symbol in this code from
elflink.c:
/* Plugin symbol type isn't currently set. Stop bogus errors. */
if (oldbfd != NULL && (oldbfd->flags & BFD_PLUGIN) != 0)
*type_change_ok = TRUE;
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