memset_s is the culprit - this version works with the python library (throws symbol lookup error; does not crash)

sdk/tlibc/Makefile

@@ -52,7 +52,7 @@ LIBC_C_SRCS := $(wildcard gen/*.c gdtoa/*.c locale/*.c stdlib/*.c string/*.c std
 endif
 LIBC_C_SRCS := $(filter-out stdlib/malloc.c,$(LIBC_C_SRCS))
 
-LIBC_C_SRCS := string/consttime_memequal.c string/memset_s.c gen/errno.c
+LIBC_C_SRCS := string/consttime_memequal.c gen/errno.c
 
 LIBC_CPP_SRCS := $(wildcard gen/*.cpp) tstdc_version.cpp
 LIBC_ASM_SRCS := $(wildcard gen/*.S)