I’m experimenting with D on iOS, I’m using the `arm64-apple-ios12.0` target. When compiling the runtime using `ldc-build-runtime` I’ve encountered an issue. The size of `real` is 16 while using Clang, `long double` is 8, i.e. same as `double`. LDC also seems to output some kind of emulated floating point for `real,` I get a lot of missing symbols like `___fixunstfdi`, these seems to be related to emulating floating point. When compiling the same code using Clang (replacing `real` with `long double`) Clang does not output these symbols. If I change the type of `real` in `Target::_init` from `Tfloat80` to `Tfloat64` the size of `real` is correct but LDC still outputs the symbols for emulating floating point. Any ideas?

-- 
/Jacob Carlborg

On Saturday, 4 January 2020 at 13:26:05 UTC, Jacob Carlborg wrote:
> If I change the type of `real` in `Target::_init` from `Tfloat80` to `Tfloat64` the size of `real` is correct but LDC still outputs the symbols for emulating floating point. Any ideas?

That's definitely not the right location; see https://github.com/ldc-developers/ldc/blob/0a1a40ebc7ee29b02a6e92daa389e3c5611f086f/ir/irtype.cpp#L64-L66.

On Saturday, 4 January 2020 at 15:43:53 UTC, kinke wrote:
> That's definitely not the right location; see https://github.com/ldc-developers/ldc/blob/0a1a40ebc7ee29b02a6e92daa389e3c5611f086f/ir/irtype.cpp#L64-L66.

That worked, thanks.

—
/Jacob Carlborg

On Sunday, 5 January 2020 at 08:49:51 UTC, Jacob Carlborg wrote:
> That worked, thanks.

Great; don't hesitate to ask for further assistance. You're most likely well aware of Dan's work [1]; I gave the compiler diff an extremely superficial glance, and most of it seemed obsolete by now (notable exception: his gen/abi-ios-* additions), incl. LLVM by now supporting TLS for iOS. I haven't looked at the druntime/Phobos diff, but I guess it's still highly useful.

On Sunday, 5 January 2020 at 19:19:51 UTC, kinke wrote:
> Dan's work [1]

Argh, here's the link: https://github.com/ldc-developers/ldc/compare/master...smolt:ios#files_bucket

On 2020-01-05 20:19, kinke wrote:

> Great; don't hesitate to ask for further assistance.

Thanks.

> You're most likely well aware of Dan's work [1];

Yes.

> I gave the compiler diff an extremely superficial glance, and most of it seemed obsolete by now

I guessed that it would be a bit obsolete.

> (notable exception: his gen/abi-ios-* additions), incl. LLVM by now supporting TLS for iOS. I haven't looked at the druntime/Phobos diff, but I guess it's still highly useful.

Thanks.

-- 
/Jacob Carlborg