* Add another memory barrier in memory.c to prevent races in memory slot allocation

* Add an all-core test on Drone.io's ThunderX platform and modify dgemm_tester to use all 96 cores

Add a Z13 build to the Travis configuration (#2542)

Revert 42 z12ci to keep forked develop clean

This reverts commit 7972beb375.

* Add IBM Z to Travis configuration

* Add IBM Z to Travis configuration

rebase

* Add an ARMV7 iOS build on Travis

* thread_local appears to be unavailable on ARMV7 iOS

* Add no-thumb option for ARMV7 IOS build to get it to accept DMB ISH

* Make local labels in macros of nrm2_vfpv3.S compatible with the xcode assembler

Add "recursive" option for LAPACK builds with ifort or pgfort as well

as shown in Reference-LAPACK issue 401 (their PR 403)

Fix zero initialization for beta=0 case

use immediate initialization instead of multiplication in case register content is a NaN

Fix avx512 sgemm performance bug when ldc is a multiple of 1024

Use runtime check for AVX512 capability in DYNAMIC_ARCH builds made on SKX

rebase

Add message highlighting minimum target choice at end of DYNAMIC_ARCH…

add ctest for drotm and modified ctest for drot.