__gnu_{f2h,h2f}_ieee?

[Havard Eidnes <he%NetBSD.org@localhost>]

Hi,

I'm currently in the process of cross-building rust 1.85 for the
various targets we try to maintain.  This is mostly proceeding
well, but our "mipsel" target is failing to build, with:

          clippy_utils.c33fa2c5294c0ca2-cgu.08:(.text._RNvMs7_NtCsgLiP1snAFCU_12clippy_utils6constsNtB5_13ConstEvalCtxt4expr+0xa7c): undefined reference to `__gnu_h2f_ieee'
          /u/mipsel/tools/bin/../lib/gcc/mipsel--netbsd/10.5.0/../../../../mipsel--netbsd/bin/ld: clippy_utils.c33fa2c5294c0ca2-cgu.08:(.text._RNvMs7_NtCsgLiP1snAFCU_12clippy_utils6constsNtB5_13ConstEvalCtxt4expr+0xa88): undefined reference to `__gnu_h2f_ieee'
          /u/mipsel/tools/bin/../lib/gcc/mipsel--netbsd/10.5.0/../../../../mipsel--netbsd/bin/ld: clippy_utils.c33fa2c5294c0ca2-cgu.08:(.text._RNvMs7_NtCsgLiP1snAFCU_12clippy_utils6constsNtB5_13ConstEvalCtxt4expr+0xa90): undefined reference to `__gnu_f2h_ieee'
          /u/mipsel/tools/bin/../lib/gcc/mipsel--netbsd/10.5.0/../../../../mipsel--netbsd/bin/ld: clippy_utils.c33fa2c5294c0ca2-cgu.08:(.text._RNvMs7_NtCsgLiP1snAFCU_12clippy_utils6constsNtB5_13ConstEvalCtxt4expr+0xa98): undefined reference to `__gnu_f2h_ieee'
          /u/mipsel/tools/bin/../lib/gcc/mipsel--netbsd/10.5.0/../../../../mipsel--netbsd/bin/ld: clippy_utils.c33fa2c5294c0ca2-cgu.08:(.text._RNvMs7_NtCsgLiP1snAFCU_12clippy_utils6constsNtB5_13ConstEvalCtxt4expr+0xc00): undefined reference to `__gnu_h2f_ieee'
          /u/mipsel/tools/bin/../lib/gcc/mipsel--netbsd/10.5.0/../../../../mipsel--netbsd/bin/ld: clippy_utils.c33fa2c5294c0ca2-cgu.08:(.text._RNvMs7_NtCsgLiP1snAFCU_12clippy_utils6constsNtB5_13ConstEvalCtxt4expr+0xc0c): undefined reference to `__gnu_h2f_ieee'
          /u/mipsel/tools/bin/../lib/gcc/mipsel--netbsd/10.5.0/../../../../mipsel--netbsd/bin/ld: clippy_utils.c33fa2c5294c0ca2-cgu.08:(.text._RNvMs7_NtCsgLiP1snAFCU_12clippy_utils6constsNtB5_13ConstEvalCtxt4expr+0xc14): undefined reference to `__gnu_f2h_ieee'
          /u/mipsel/tools/bin/../lib/gcc/mipsel--netbsd/10.5.0/../../../../mipsel--netbsd/bin/ld: clippy_utils.c33fa2c5294c0ca2-cgu.08:(.text._RNvMs7_NtCsgLiP1snAFCU_12clippy_utils6constsNtB5_13ConstEvalCtxt4expr+0xc1c): undefined reference to `__gnu_f2h_ieee'
          /u/mipsel/tools/bin/../lib/gcc/mipsel--netbsd/10.5.0/../../../../mipsel--netbsd/bin/ld: link errors found, deleting executable `/usr/pkgsrc/wip/rust185/work/rustc-1.85.0-src/build/x86_64-unknown-netbsd/stage1-tools/mipsel-unknown-netbsd/release/deps/clippy_driver-3e44b5b01533b167'

I'm currently buried in other work ("real" work), so for now
would appreciate hints about what this is and where it's expected
to come from.

Best regards,

- Håvard