Automated report: NetBSD-current/riscv-riscv64 build failure

[NetBSD Test Fixture <bracket%NetBSD.org@localhost>]

This is an automatically generated notice of a NetBSD-current/riscv-
riscv64 build failure.

The failure occurred on babylon5.netbsd.org, a NetBSD/amd64 host,
using sources from CVS date 2026.05.03.11.48.02.

An extract from the build.sh output follows:

    --- dependall-libprop ---
    --- prop_string.d ---
    #    create  libprop/prop_string.d
    CC=/tmp/build/2026.05.03.11.48.02-riscv-riscv64/tools/bin/riscv64--netbsd-gcc /tmp/build/2026.05.03.11.48.02-riscv-riscv64/tools/bin/nbmkdep -f prop_string.d.tmp  --   -std=gnu11 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-sign-compare -Wsystem-headers -Wno-traditional -Wa,--fatal-warnings -Wreturn-type -Wswitch -Wshadow -Wcast-qual -Wwrite-strings -Wextra -Wno-unused-parameter -Wno-sign-compare -Wold-style-definition -Wsign-compare -Wformat=2 -Wno-format-zero-length -Werror  --sysroot=/tmp/build/2026.05.03.11.48.02-riscv-riscv64/destdir -D_LIBPROP -D_REENTRANT -I/tmp/build/2026.05.03.11.48.02-riscv-riscv64/src/lib/libc/include -fvisibility=hidden    /tmp/build/2026.05.03.11.48.02-riscv-riscv64/src/common/lib/libprop/prop_string.c &&  mv -f prop_string.d.tmp prop_string.d
    --- dependall-libkern ---
    /tmp/build/2026.05.03.11.48.02-riscv-riscv64/src/sys/lib/libkern/../../../common/lib/libc/atomic/atomic_cas_8_cas.c:38:10: fatal error: stdarg.h: No such file or directory
       38 | #include <stdarg.h>
          |          ^~~~~~~~~~
    compilation terminated.
    --- dependall-libposix ---
    --- libposix.so.0.1 ---

The following commits were made between the last successful build and
the first failed build:

    2026.05.03.11.48.02 skrll src/common/lib/libc/atomic/atomic_cas_16_cas.c 1.4
    2026.05.03.11.48.02 skrll src/common/lib/libc/atomic/atomic_cas_32_cas.c 1.3
    2026.05.03.11.48.02 skrll src/common/lib/libc/atomic/atomic_cas_64_cas.c 1.4
    2026.05.03.11.48.02 skrll src/common/lib/libc/atomic/atomic_cas_8_cas.c 1.4
    2026.05.03.11.48.02 skrll src/common/lib/libc/atomic/atomic_cas_by_cas32.c 1.5
    2026.05.03.11.48.02 skrll src/common/lib/libc/atomic/atomic_init_testset.c 1.22

Logs can be found at:

    https://releng.NetBSD.org/b5reports/riscv-riscv64/commits-2026.05.html#2026.05.03.11.48.02