2.26.90 : missing 'libmvec_nonshared.a' ?

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

Good day -

I just tried building latest glibc GIT tag 'glibc-2.26.9000', for
armv7hl-linux , with
the linaro GCC 6.4.1 compiler, and configure environment + args:

   CC=arm-linux-gnueabihh
   CFLAGS='-mtune=cortex-a15 -O3 -g'
    ../configure --prefix=/usr --with-headers=${path_to_kernel_4.9_headers}  \
    --build=x86_64-linux-gnu --host=arm-linux-gnueabihf --enable-multi-arch \
    --enable-obsolete-rpc --enable-obsolete-nsl \
    --enable-tunables=yes --enable-mathvec

which completed successfully , as did the 'make install' .

I specified '--enable-multi-arch' to get both the VFP and Neon
variants for ARM7.

But I see in the installed /usr/lib directory :

  $ grep -I libmvec *
libm.a:GROUP ( /usr/lib/libm-2.26.90.a /usr/lib/libmvec.a )
libm.so:GROUP ( /lib/libm.so.6  AS_NEEDED (
/usr/lib/libmvec_nonshared.a /lib/libmvec.so.1 ) )

But there was no libmvec_nonshared.a produced by the build or installed:
 $ find ../../lib ../../usr/lib -name 'libmvec*'
../../lib/libmvec.so.1
../../lib/libmvec-2.26.90.so
../../usr/lib/libmvec.a
../../usr/lib/libmvec.so

If I 'cd' to the build directory, and do
 $ cd mathvec
 $ make subdir=mathvec libmvec_nonshared.a
make: *** No rule to make target libmvec_nonshared.a.  Stop.
 $ cd ../math
 $ make subdir=math libmvec_nonshared.a
make: *** No rule to make target libmvec_nonshared.a.  Stop.

Why is this file missing ?

How is this missing file meant to be produced ?

Can I safely remove 'libmvec_nonshared.a'  from /usr/lib/libm.{a,so} ?
Or should I replace 'libmvec_nonshared.a' with 'libmvec.a' ?

Should I raise a bug about this ?

Does libmvec support Neon SIMD instructions ?
Or should I just disable libmvec for ARM7hl (with Neon) ?

Any advice much appreciated .

Thanks in advance, Best Regards,

Jason Vas Dias <jason.vas.dias@gmail.com>

sorry for the To: list, which was from last mail to libc-alpha that
contained 'libmvec':
"Re: [RFC, VECTOR ABI] Allow __attribute__((vector)) in GCC by default."
.