x87 not supported on macos-15

[rikkimax]

x87 appears to not be available, backend tries to use longdouble module, but its disabled. May effect ldc & rest of compiler to just turn it on.
So filing.

src/dmd/backend/x86/cg87.d(656): Error: undefined identifier ld_zero
[ld_zero,ld_one,ld_pi,ld_log2t,ld_log2e,ld_log2,ld_ln2];
^
src/dmd/backend/x86/cg87.d(656): Error: undefined identifier ld_one
[ld_zero,ld_one,ld_pi,ld_log2t,ld_log2e,ld_log2,ld_ln2];
^
src/dmd/backend/x86/cg87.d(656): Error: undefined identifier ld_pi
[ld_zero,ld_one,ld_pi,ld_log2t,ld_log2e,ld_log2,ld_ln2];
^
src/dmd/backend/x86/cg87.d(656): Error: undefined identifier ld_log2t
[ld_zero,ld_one,ld_pi,ld_log2t,ld_log2e,ld_log2,ld_ln2];
^
src/dmd/backend/x86/cg87.d(656): Error: undefined identifier ld_log2e
[ld_zero,ld_one,ld_pi,ld_log2t,ld_log2e,ld_log2,ld_ln2];
^
src/dmd/backend/x86/cg87.d(656): Error: undefined identifier ld_log2
[ld_zero,ld_one,ld_pi,ld_log2t,ld_log2e,ld_log2,ld_ln2];
^
src/dmd/backend/x86/cg87.d(656): Error: undefined identifier ld_ln2
[ld_zero,ld_one,ld_pi,ld_log2t,ld_log2e,ld_log2,ld_ln2];

[ibuclaw]

The reference in code

static if (real.sizeof < 10)
{
    import dmd.root.longdouble;
    immutable targ_ldouble[7] ldval =
    [ld_zero,ld_one,ld_pi,ld_log2t,ld_log2e,ld_log2,ld_ln2];
}

The definition is guarded by:

version (CRuntime_Microsoft):
extern (C++):
nothrow:
@nogc:

[dkorpel]

How do you reproduce this error? Considering Mac is moving away from x86, is this going to be relevant once the Aarch64 backend is adopted?

[rikkimax]

Yes, it may still be relevant because dmd has a module dedicated to it.

But honestly? I hope we don't run into this again before the arm backend is ready.