1. the already deprecated -openmp option was removed in 2018, switch to -fopenmp
2. add leading blank in search for "zho_ge__" symbol to work around misleading tags in the 2018 assembly
Expected to fix #1548

Avoid out-of-bounds accesses in blas_quickdivide on big X86 systems

Should fix #1541

Disable multithreading in ztrmv

Use _Atomic instead of volatile for thread safety where C11 is supported

Fix typo in MIPS P5600 complex ASUM code selection

BLAS-Tester shows that the same problem exists as with DTRMV (issue #1332)

Fix handling of zero INCX, INCY in ArmV7 AXPY and ROT

to pass the related utest (see #1469)

...to pass the related utest (see #1469)

* Use generic C implementation of zrot on ppc64/POWER6 to work around utest failure from #1469

Revert "Fix 32bit HASWELL builds"

Do not try to build the fork utest when NO_CBLAS=1

ARM64: Enable Auto Detection of ThunderX2T99

Include sys/types.h for proper typedefs related to wait()

Catch invalid cpu count returned by CPU_COUNT_S

Should fix #1519

mips32 was seen to return zero here, driving nthreads to zero with subsequent fpe in blas_quickdivide

Correct precision of mips dsdot

Add macOS to the Travis testing matrix: Take 2!

Revert "Add macOS to the Travis testing matrix"

Add macOS to the Travis testing matrix

Add DragonFly to exports/Makefile

Its exclusion was an oversight on my part.

Fix thread races and infinite looping on systems with many cpus

Underline importance of NUM_THREADS setting for BUFFER allocation

Minor changes to wording and formatting in the README

The wording in some places is not grammatically correct. This change
also provides minor adjustments to the Markdown formatting which provide
modest improvements to readability.

Compile with cc rather than gcc whenever possible

following augray's suggestion from #1451, and incorporating ashwinyes' comments from #1141 on the importance of NUM_THREADS even for single-threaded builds.

On systems with more than 64 cpus, blas_quickdivide will sometimes return zero which creates bogus workloads when used for the stride calculation. This then leads to threads spinning incessantly waiting for a status change that never happens, as seen in #1497.
This patch also fixes several data races that were found by helgrind and/or tsan while debugging the issue.

Allow building on OpenBSD