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Re: [PATCH v2 3/3] Consolidate posix_fadvise implementations
On Wed, 12 Oct 2016, Adhemerval Zanella wrote:
> For some reason I am not seeing this issue with my mips64n64 toolchain
> (gcc 5.3.1, binutils 2.26.0.20160331).
I was using GCC 5.4.1 20160810 and binutils 2.27.51.20160810. I've now
updated to today's GCC 5 branch and binutils master, and still see the
same issue, in a clean build from scratch.
The error is complaining about libc.so when linking sotruss-lib.so.
libc.so has (readelf --dyn-syms)
262: 000000000010b950 28 FUNC GLOBAL DEFAULT 12 posix_fadvise64@GLIBC_2.2
417: 000000000010b950 28 FUNC WEAK DEFAULT 12 posix_fadvise64@@GLIBC_2.2
1505: 000000000010b950 28 FUNC GLOBAL DEFAULT 12 posix_fadvise64@@GLIBC_2.3.3
that is, two separate definitions at version GLIBC_2.2. It looks to me
like sysdeps/unix/sysv/linux/posix_fadvise64.c would create a
posix_fadvise64 weak_alias, while
sysdeps/unix/sysv/linux/mips/mips64/n64/posix_fadvise64.c then adds
compat_symbol / versioned_symbol calls. If a symbol is being created with
explicit versioning, direct weak_alias / strong_alias calls for it should
be disabled.
--
Joseph S. Myers
joseph@codesourcery.com