• Bruce Carneal (6/6) Apr 08 I'm getting an apparently spurious warning, "ignoring
• Johan (4/10) Apr 13 Hi Bruce,
• Bruce Carneal (4/16) Apr 13 I resurrected my, forgotten, GitHub account and filed it. Thanks
• inceptionbaseball (12/18) May 15 You're right—this seems to be a warning triggered by LDC's

Bruce Carneal <bcarneal gmail.com> writes:

I'm getting an apparently spurious warning, "ignoring 
unrecognized special parameter attribute ..." from ldc2 when 
passed the -w flag and using the  target attribute.  Here's an 
example:

https://godbolt.org/z/vx6naWxYr

Code is generated correctly AFAICT when the -w flag is removed.

Johan <j j.nl> writes:

On Wednesday, 9 April 2025 at 02:26:18 UTC, Bruce Carneal wrote:
 I'm getting an apparently spurious warning, "ignoring 
 unrecognized special parameter attribute ..." from ldc2 when 
 passed the -w flag and using the  target attribute.  Here's an 
 example:

 https://godbolt.org/z/vx6naWxYr

 Code is generated correctly AFAICT when the -w flag is removed.

Hi Bruce,
   Please report it on github, thanks!

Johan

Bruce Carneal <bcarneal gmail.com> writes:

On Sunday, 13 April 2025 at 18:31:31 UTC, Johan wrote:
 On Wednesday, 9 April 2025 at 02:26:18 UTC, Bruce Carneal wrote:
 I'm getting an apparently spurious warning, "ignoring 
 unrecognized special parameter attribute ..." from ldc2 when 
 passed the -w flag and using the  target attribute.  Here's an 
 example:

 https://godbolt.org/z/vx6naWxYr

 Code is generated correctly AFAICT when the -w flag is removed.

 Hi Bruce,
   Please report it on github, thanks!

 Johan

I resurrected my, forgotten, GitHub account and filed it.  Thanks 
again Johan for the work you do on LDC.

Bruce

inceptionbaseball <trunnelshine gmail.com> writes:

On Wednesday, 9 April 2025 at 02:26:18 UTC, Bruce Carneal wrote:
 I'm getting an apparently spurious warning, "ignoring 
 unrecognized special parameter attribute ..." from ldc2 when 
 passed the -w flag and using the  target attribute.  Here's an 
 example:

 https://godbolt.org/z/vx6naWxYr https://snow-rider.io/

 Code is generated correctly AFAICT when the -w flag is removed.

You're right—this seems to be a warning triggered by LDC's 
stricter diagnostics when using -w, even though the code compiles 
and runs as expected. The issue likely stems from LDC not fully 
recognizing or supporting the  target("...") attribute syntax 
you're using.

You might consider filing a bug report or feature request with 
the LDC project if this isn't documented behavior. In the 
meantime, if -w is too noisy for your use case, a possible 
workaround is to suppress specific warnings if LDC supports that, 
or remove -w during development and enable it selectively in 
CI/testing.