On 02.09.2026 02:35, Eric Raible wrote:
Here is a simple self-contained example. It seems to show that tcc_add_symbol
doesn't work with
_Thread_local, at least on my setup.
Hi, two things...
1) "tcc -run" / JIT libtcc does not support thread local storage
(error message still missing...)
2) __thread variables may look like normal variables but they are not.
As such, with
int__thread x2 = 42;
tcc_add_symbol(s, "x2", &x2);
this 'x2' does not have an address really. All you can do from C is
to take the address of the current threads instance of 'x2'. But then
again that instance is not a '__thread' object. It is just a normal
'int' with 4 bytes somewhere in the memory address space.
Which of course JIT code could still access as 'extern int x2;'
(plus __attribute__((dllimport)) on windows).
That is how I would see it...
-- gr
Thanks - Eric
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