RISC-V: GCC crti.S vs. Newlib __libc_init_array()

Hello,

the GCC provided libgcc/config/riscv/crti.S and 
libgcc/config/riscv/crtn.S files are empty on RISC-V, e.g. they contain 
no definitions of _init and _fini. This leads to undefined references in 
Newlib provided __libc_init_array() and __libc_fini_array(). I would 
like to fix this. Should this be done via some configure test or a 
__riscv machine define in newlib/libc/misc/init.c and 
newlib/libc/misc/fini.c?

-- 
Sebastian Huber, embedded brains GmbH

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