Attempted buildworlds via devel/llvm90 failed for: undefined symbol: bcmp / undefined reference to `bcmp'

[Mark Millard]

amd64 (self hosted):

--- all_subdir_libexec ---
ld: error: undefined symbol: bcmp
>>> referenced by strstr.c:121 (/usr/src/lib/libc/string/strstr.c:121)
>>>               strstr.nossppico:(strstr) in archive /usr/obj/amd64_xtoolchain-llvm/amd64.amd64/usr/src/amd64.amd64/libexec/rtld-elf/rtld_libc.a
clang-9: error: linker command failed with exit code 1 (use -v to see invocation)

amd64->powerpc64 cross build:

--- all_subdir_libexec ---
/usr/local/powerpc64-unknown-freebsd13.0/bin/ld: /usr/obj/powerpc64vtsc_xtoolchain-llvm/powerpc.powerpc64/usr/src/powerpc.powerpc64/libexec/rtld-elf/rtld_libc.a(strstr.nossppico): in function `twoway_strstr':
/usr/src/lib/libc/string/strstr.c:121: undefined reference to `bcmp'


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)