Missing `cspr_64_` symbol in ILP64 MKL

[ev-br]

MKL 2025 installed from pypi seems to be missing the `cspr_64_` symbol with the trailing underscore:

$ nm libmkl_intel_ilp64.so |grep cspr_64
00000000002e3f80 T cspr_64
00000000002e3f80 T mkl_lapack__cspr_64_

while

$ nm libmkl_intel_ilp64.so |grep sspr_64
00000000002d1e60 T cblas_sspr_64
0000000000239d60 T sspr_64
0000000000239d60 T sspr_64_
$ nm libmkl_intel_ilp64.so |grep dspr_64
00000000002c5c70 T cblas_dspr_64
0000000000252660 T dspr_64
0000000000252660 T dspr_64_

 Found it via the SciPy's pull request which aims to bring ILP64 support to SciPy, https://github.com/scipy/scipy/pull/22743/

Our current workaround is to define an env variable and 

#ifdef FIX_MKL_2025_ILP64_MISSING_SYMBOL
#define cspr_64_ cspr_64
#endif

[Fengrui]

Thank you for catching this issue! I have reported it internally.

[ev-br]

Thank you Fengrui!

Meanwhile, over at https://github.com/scipy/scipy/pull/23895 we noticed that several more symbols are missing the trailing underscore:

```

#ifdef FIX_MKL_2025_ILP64_MISSING_SYMBOL
#define cspr_64_ cspr_64
#define sgetc2_64_ sgetc2_64
#define dgetc2_64_ dgetc2_64
#define cgetc2_64_ cgetc2_64
#define zgetc2_64_ zgetc2_64
#define slasd4_64_ slasd4_64
#define dlasd4_64_ dlasd4_64
#endif

```

[Fengrui]

These symbols were also added. The fix will be available in the 2026.0 release.

Thanks,

Fengrui

[ev-br]

Superb, thank you. Looking forward to being able to use 2026.0 then!