* I cannot disable GCC TLS support thoroughly.
@ 2011-09-22 10:05 Terry Guo
2011-09-22 17:34 ` Ian Lance Taylor
0 siblings, 1 reply; 2+ messages in thread
From: Terry Guo @ 2011-09-22 10:05 UTC (permalink / raw)
To: gcc
Hello,
I configured my gcc with "--disable-tls" for arm-none-eabi. But it can
still successfully compile the below case:
__thread int i;
int f (void) { return i; }
void main (int j) { i = j; }
The "dg-require-effective-target tls" use this case to check whether
target supports tls. So how to configure GCC to let it fail to compile
this case, and then let the dg test framework thinks the tls is
unsupported? Thanks in advance.
BR,
Terry
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: I cannot disable GCC TLS support thoroughly.
2011-09-22 10:05 I cannot disable GCC TLS support thoroughly Terry Guo
@ 2011-09-22 17:34 ` Ian Lance Taylor
0 siblings, 0 replies; 2+ messages in thread
From: Ian Lance Taylor @ 2011-09-22 17:34 UTC (permalink / raw)
To: Terry Guo; +Cc: gcc
Terry Guo <flameroc@gmail.com> writes:
> I configured my gcc with "--disable-tls" for arm-none-eabi. But it can
> still successfully compile the below case:
>
> __thread int i;
> int f (void) { return i; }
> void main (int j) { i = j; }
>
> The "dg-require-effective-target tls" use this case to check whether
> target supports tls. So how to configure GCC to let it fail to compile
> this case, and then let the dg test framework thinks the tls is
> unsupported? Thanks in advance.
When the assembler and/or linker do not support TLS, gcc will emulate it
using pthread_key_create. So as far as I know there is no way to
thoroughly disable it.
Ian
^ permalink raw reply [flat|nested] 2+ messages in thread
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