add math backends: arma, blaze #276

	name: build-linux

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	env:
	# Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
	BUILD_TYPE: Release

	jobs:
	build:
	# The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
	# You can convert this to a matrix build if you need cross-platform coverage.
	# See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
	runs-on: ubuntu-latest
	if: github.ref_name == 'main'
	steps:
	- uses: actions/checkout@v3
	- uses: cachix/install-nix-action@v22

	- name: Build
	working-directory: ${{github.workspace}}
	# Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
	# See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
	run: nix build

Provide feedback