[PATCH] Hurd: Enable ifunc by default

[Joseph Myers]

On Wed, 13 Jan 2021, Thomas Schwinge wrote:

> Hi!
> 
> Thanks (and sorry for the delay), pushed "Hurd: Enable ifunc by default"
> to master branch in commit e9cb89b936f831a02318d45fc4ddb06f7be55ae4, and
> cherry-picked into releases/gcc-10 branch in commit
> 92b131491c22eb4e4b663d226e9d97f1fd693063, releases/gcc-9 branch in commit
> 0313ce139f4ca3c96db9dc82125ec9e4a167a224, releases/gcc-8 branch in commit
> 975b0fa0f43e84bed3cb1b2b593132bc219f962c, see attached.

I'm not sure what toolchain component the underlying bug is in, but this 
GCC commit (verified in the releases/gcc-10 case) results in a glibc build 
failure for i686-gnu with build-many-glibcs.py.

https://sourceware.org/pipermail/libc-testresults/2021q1/007378.html

The error is:

/scratch/jmyers/glibc-bot/install/compilers/i686-gnu/lib/gcc/i686-glibc-gnu/11.0.0/../../../../i686-glibc-gnu/bin/ld: /scratch/jmyers/glibc-bot/build/compilers/i686-gnu/glibc/i686-gnu/elf/librtld.os: in function `hurd_file_name_lookup_retry':
(.text+0x1e08e): undefined reference to `strncpy'
collect2: error: ld returned 1 exit status
Makefile:584: recipe for target '/scratch/jmyers/glibc-bot/build/compilers/i686-gnu/glibc/i686-gnu/elf/ld.so' failed
make[3]: *** [/scratch/jmyers/glibc-bot/build/compilers/i686-gnu/glibc/i686-gnu/elf/ld.so] Error 1

-- 
Joseph S. Myers
joseph@codesourcery.com