get rid of fathmath; reinstate pxstrec in default build #81

	name: Build-N-Test

	on:
	push:
	branches: master
	pull_request:
	branches: master

	jobs:
	build:
	strategy:
	matrix:
	os:
	- ubuntu-latest
	- macOS-latest
	runs-on: ${{ matrix.os }}
	defaults:
	run:
	working-directory: ./src
	steps:
	- uses: actions/checkout@v4
	- name: Install brew dependencies
	if: runner.os == 'macOS'
	run: \|
	# install dependencies
	brew install nlopt armadillo automake autoconf
	# add paths (new brew install location)
	echo "LDFLAGS=-L$(brew --prefix)/lib" >> $GITHUB_ENV
	echo "CPPFLAGS=-I$(brew --prefix)/include" >> $GITHUB_ENV
	- name: Install apt dependencies
	if: runner.os == 'Linux'
	run: \|
	# Ensure the script doesnt hang waiting for user input
	export DEBIAN_FRONTEND=noninteractive
	# Update system
	sudo apt-get update
	sudo apt-get install -y \
	autotools-dev \
	automake \
	libtool \
	liblapack-dev \
	libatlas-cpp-0.6-dev \
	libnlopt0 \
	libnlopt-dev \
	libnlopt-cxx-dev \
	libarmadillo-dev
	- name: autoconf
	run: autoreconf -fiv
	- name: configure
	run: ./configure
	- name: make
	run: make -j
	- name: make check
	run: make check
	- name: make installcheck
	run: make installcheck

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