[PATCH] libc.so: Replace nscd_hash.os with libc-nscd_hash.os [BZ #22459]

[Florian Weimer]

On 11/19/2017 08:44 PM, H.J. Lu wrote:
> nscd_hash.os is needed both libc.so as well as nscd.  Since nscd_hash.os
> is compiled as the part of nscd, when -fstack-protector-all is used,
> nscd_hash.os calls __stack_chk_fail via PLT, which leads to
> 
> FAIL: elf/check-localplt
> Extra PLT reference: libc.so: __stack_chk_fail
> 
> This patch replaces nscd_hash.os with libc-nscd_hash.os in libc_pic.a
> to avoid calling __stack_chk_fail via PLT inside of libc.so.
> 
> Any comments?

Considering that nscd/nscd_hash.c is itself another #include wrapper, I 
think it is time to clean this up.

The hash function algorithm is already part of the public ABI because 
the nscd mappings require it, so we might as well export it, which is 
implemented in the attached patch.

Thanks,
Florian
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