remove fastmath from x280 target

Update Makefile.riscv64

remove fast-math

Rewrite the "Build system" documentation page

PPC970: fix scal

Content is reviewed fairly carefully, and should be up to the
same standard as the rest of the docs now.

Uses Mermaid to render it as a diagram in the html docs.

The doc build is now clean of warnings again.

This only fixes Markdown syntax, and adds a few headers to bring
some structure into the long list of variables that influence the
build. It does not add or remove variables.

Add a documentation page for the runtime variables

This reverts commit 9b9c0aa5c9.

Add build instructions for Huawei's HarmonyOS to the documentation

Temporarily disable the default S/DSCAL kernel on PPC970

[WIP,Testing] Add CI workflow to test crossbuilding for Huawei HarmonyOS

Identify all cores in ARM64 autodetection, return fastest TARGET and performance group sizes

Optimize the nrm2_rvv function to further improve performance.

Add an install_tests target to facilitate testing cross-compiles

Fix "make install" creating incorrect names for suffixed libraries in the cmake and pkgconfig files

Restore libsuffix support in pkg-config file

Add a paragraph on "benign" LAPACK-TEST errors to the FAQ document

Signed-off-by: tingbo.liao <tingbo.liao@starfivetech.com>

Disable multithreading in ?TRTRI for small workloads

[WIP]Add better workaround for GEMM3M on GENERIC and re-enable EXPRECISION for x86/x86_64 targets

Optimize the zgemm_tcopy_4_rvv function to be compatible with the situations where the vector lengths(vlens) are 128 and 256.

Improve OpenBLASConfig.cmake contents in gmake builds