Here are pre-generated files from jemalloc on Linux risc-v.
You can obtain these files by running ./autogen.sh inside jemalloc source directory.

Added #define GNU_SOURCE
Added JEMALLOC_OVERRIDE___POSIX_MEMALIGN because why not.
Removed JEMALLOC_HAVE_ATTR_FORMAT_GNU_PRINTF because it's non standard.
Removed JEMALLOC_PURGE_MADVISE_FREE because it's available only from Linux 4.5.
Added JEMALLOC_CONFIG_MALLOC_CONF substitution