glibc linking broken

[mschubert]

Building gcc fails with /nfs/research2/software/prefix/usr/x86_64-pc-linux-gnu/bin/ld: cannot find /lib64/libmvec.so.1 - but it shouldn't even link this library (or should it? - this belongs to sys-libs/glibc, which so far we used from prefix, has it become incompatible with host sys-linux/glibc)?

Packages that did build after the faulty glibc upgrade and start with a GLIBCXX_3.4.15 in /usr/lib64/libstdc++.so.6 error:

• [x] app-vim/youcompleteme
• [x] app-shells/fish

Building the following packages fails with undefined reference to __fdelt_chk:

• [x] cmake
• [x] fish
• [x] sys-devel/gcc
• [ ] sys-devel/gcc[gcj]
• [ ] net-libs/nodejs
• [x] dev-libs/libxml2
• [ ] sys-devel/gettext

Building the following packages fails with undefined reference to __poll_chk:

• [ ] dev-db/mariadb
• [x] sys-libs/ncurses [recompiling I broke htop, nano, ghc temporarily]

[mattjeffryes]

fish no longer launches

fish: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by fish)

[mschubert]

@mattjeffryes, fish should be working again

[mattjeffryes]

@mschubert It is, thank you!

[mschubert]

some notes in this mess:

• gcc[fortran] req'd for R, otherwise "can not combine C and Fortran code" configure error & libquadmath linked for runtime missing
• ?? can get fish, ycm running by ncurses[-unicode] -> but if I check equery u it's still there?
• if gawk linking errors "UP" copy binary from jsr/m-sw
• python-{3.4.3-r5,3.5.1} compile error is because glibc, util-linux provide 2 different versions of prlimit
• ncurses compilation with FORTIFY_SOURCE gives __poll_chk error
• emerging binutils-config breaks R/fish/cmake; emerging gcc fixes it

[mschubert]

package deps on glibc in the tree are no longer required, so remove it entirely and rely on host