On Wed, May 30, 2012 at 1:39 PM, Steve Ellcey <[email protected]> wrote:
>
> My question is: When checking the value of TARGET_SYNCI is there anyway
> to tell if the flag was set explicitly by the user or implicitly by
> the compiler? The reason I want to know is that if I build GCC for MIPS
> today and configure with --with-synci then some tests fail because
> the test specifies an old MIPS architecture that doesn't support synci
> and the test prints a warning:
>
> if (TARGET_SYNCI && !ISA_HAS_SYNCI)
> {
> warning (0, "the %qs architecture does not support the synci "
> "instruction", mips_arch_info->name);
> target_flags &= ~MASK_SYNCI;
> }
>
> Ideally, this warning should only be printed if the user explicitly asked
> for -msynci, not if -msynci was merely set as the default. But I am not sure
> how to tell the difference between those two situations.
I think you want to examine target_flags_explicit.
- David
