mcontext_t type is missing from ucontext.h about riscv-glibc

[markcorbinuk]

I am working with Buildroot and it does not support glibc-2.29 yet. Using the 2.26 version for 32bit RISC-V is a temporary solution until Buildroot moves to glibc 2.29. Once Buildroot supports 2.29 I will update the RISC-V support to use either riscv-glibc-2.29 or the upstream (if it has the necessary changes included).

[kito-cheng]

Could you try riscv-glibc-2.29 branch? it should be most stable branch for RV32, and it will upstream in near future.

[palmer-dabbelt]

@kraj IIRC this is bigger than a RISC-V issue, and there are patches floating around Yocto to fix up the build of various packages for newer glibc versions.

[jim-wilson]

This was fixed on the riscv-glibc-2.27 branch. Buildroot is now using glibc 2.32 for rv64 and glibc-2.33 pre-release for rv32. So this issue is no longer relevant.