package/glibc: bump to 2.26

package/glibc: bump to 2.26

Drop upstream patch:

0001-sh-Fix-building-with-gcc5-6.patch
https://sourceware.org/git/?p=glibc.git;a=commit;h=d40dbe722f004f999b589de776f7e57e564dda01

0002-CVE-2017-1000366-Ignore-LD_LIBRARY_PATH-for-AT_SECUR.patch
https://sourceware.org/git/?p=glibc.git;a=commit;h=f6110a8fee2ca36f8e2d2abecf3cba9fa7b8ea7d

0003-ld.so-Reject-overly-long-LD_PRELOAD-path-elements.patch
https://sourceware.org/git/?p=glibc.git;a=commit;h=6d0ba622891bed9d8394eef1935add53003b12e8

0004-ld.so-Reject-overly-long-LD_AUDIT-path-elements.patch

https://sourceware.org/git/?p=glibc.git;a=commit;h=81b82fb966ffbd94353f793ad17116c6088dedd9

0005-fix-binutils-2-29-build.patch
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff_plain;h=388b4f1a02f3a801965028bbfcd48d905638b797

0006-i686-Add-missing-IS_IN-libc-guards-to-vectorized-strcspn.patch
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff_plain;h=69052a3a95da37169a08f9e59b2cc1808312753c

0006-sh4-trap.patch
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff_plain;h=db3d848e154b00071f4a5e729d5884efad410109

But 2.26 version introduced quite a few regressions on x86, x86_64 and
powerpc64le when float128 support was added. All these issues are now
fixed in the glibc 2.26 stable branch.

Backport patches from glibc 2.26 stable branch related to bug 21930.
Take all patches listed in this bug report in order to have all fix
for this issue [1] [2].

Fixes gnuradio build:
[...]/sysroot/usr/include/boost/functional/hash/detail/hash_float.hpp: In function ‘std::size_t boost::hash_detail::float_hash_value(T)’:
[...]/sysroot/usr/include/boost/functional/hash/detail/hash_float.hpp:210:21: error: expected primary-expression before ‘float’
             switch (fpclassify(v))
                     ^
[...]/sysroot/usr/include/boost/functional/hash/detail/hash_float.hpp:210:21: error: expected primary-expression before ‘long’
             switch (fpclassify(v))
                     ^
[...]/sysroot/usr/include/boost/functional/hash/detail/hash_float.hpp:210:21: error: found ‘:’ in nested-name-specifier, expected ‘::’
             switch (fpclassify(v))
                     ^
[...]/sysroot/usr/include/boost/functional/hash/detail/hash_float.hpp:210:21: error: ‘_Float128’ is not a class or namespace
             switch (fpclassify(v))
                     ^

[...]/sysroot/usr/include/boost/functional/hash/detail/hash_float.hpp:210:21: error: ‘_Generic’ was not declared in this scope
             switch (fpclassify(v))
                     ^

Also backport fix for glibc bug 22146.
Without this patch some C++ applications (jsoncpp, mesa3d and kodi) fail
to build due to an issue while building the toolchain.

A test in the libstdc++ configure script fail when -Os and float128 are
used.

See the bug report for details [3].

[1] https://sourceware.org/ml/libc-alpha/2017-08/msg00586.html
[2] https://sourceware.org/bugzilla/show_bug.cgi?id=21930
[3] https://sourceware.org/bugzilla/show_bug.cgi?id=22146

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>