binutils 2.28 x86_64-linux 'make check' failures when built with gcc-5.4.0 + glibc-2.25

[Jason Vas Dias <jason dot vas dot dias at gmail dot com>]

Good day binutils wizards -

I just built binutils-2.28 + gdb-7.12.1 on an x86_64 corei7 Haswell CPU,
(Intel i4910MQ 2.9-3.9Ghz 4-CPU 8-core)
with GCC 5.4.0 & glibc-2.25 installed , with configure args:

  $ /usr/os_src/binutils-2.28/configure --prefix=/usr --libdir=/usr/lib64 \
--sysconfdir=/etc --localstatedir=/var --enable-targets=all --enable-shared \
 --with-system-zlib --build=x86_64-linux-gnu --host=x86_64-linux-gnu

The build of binutils & gdb succeeded with no errors / warnings.

I got some new test failures running 'make check', and was wondering if they
are serious or harmless known issues :

 $ make check 2>&1 | tee make.check.log
...
		=== ld Summary ===

# of expected passes		1732
# of unexpected failures	31
# of unexpected successes	33
# of expected failures		24
# of untested testcases		1
# of unsupported tests		12
/usr/build/linux/binutils-2.28/ld/ld-new 2.28
...

$ grep ^FAIL make.check.log
FAIL: TLS -fpic and -fno-pic exec transitions
FAIL: TLS -fpic and -fno-pic exec transitions without PLT
FAIL: TLS descriptor -fpic and -fno-pic exec transitions
FAIL: TLS -fno-pic -shared
FAIL: ld-ifunc/pr17154-x86-64
FAIL: NOCROSSREFS_TO 3
FAIL: NOCROSSREFS_TO 4
FAIL: Build size-7
FAIL: Build size-8
FAIL: S-records
FAIL: S-records with constructors
FAIL: Build mpx4
FAIL: ld-x86-64/bnd-ifunc-2
FAIL: ld-x86-64/bnd-plt-1
FAIL: TLS -fpic -shared transitions
FAIL: TLS -fpic -shared transitions with r15 as GOT base
FAIL: TLS descriptor -fpic -shared transitions
FAIL: TLS -fpic and -fno-pic exec transitions
FAIL: TLS -fpic and -fno-pic exec transitions without PLT
FAIL: TLS descriptor -fpic and -fno-pic exec transitions
FAIL: PR ld/14207
FAIL: ld-x86-64/ilp32-4
FAIL: ld-x86-64/load1c
FAIL: ld-x86-64/load1d
FAIL: ld-x86-64/pr19162
FAIL: ld-x86-64/pr19636-2d
FAIL: ld-x86-64/pr20253-1d
FAIL: ld-x86-64/pr20253-1f
FAIL: ld-x86-64/pr20253-1j
FAIL: ld-x86-64/pr20253-1l
FAIL: Undefined weak symbol

The S-Record failures maybe I can understand (not on embedded JTAG
controlled platform)  but the TLS failures worry me, as I use TLS alot
in my code .

Should there be TLS failures on this platform ? Should I not use this build ?
I have been using a binutils-2.27 version, which had fewer test failures :

$ grep '^FAIL' ${my_2_27_build}/make.check.log
FAIL: NOCROSSREFS_TO 3
FAIL: NOCROSSREFS_TO 4
FAIL: Build size-7
FAIL: Build size-7
FAIL: Build size-8
FAIL: Build size-8
FAIL: S-records
FAIL: S-records with constructors
FAIL: Undefined weak symbol
FAIL: PLT PC-relative offset overflow check

I am inclined to continue using 2.27 until I can verify if the new
test failures are
serious issues or not - any help / advice in making this determination would be
much appreciated - has anyone seen such failures on linux-x86_64 with
2.28 before?

Thanks & Regards,
Jason