Require CMake>=3.18 #367

	# This is a CI workflow for the NCEPLIBS-ip project.
	#
	# This workflow builds on Linux with different options.
	#
	# Ed Hartnett, 1/8/23
	name: Linux
	on:
	push:
	branches:
	- develop
	pull_request:
	branches:
	- develop

	jobs:
	Linux:
	runs-on: ubuntu-24.04

	strategy:
	matrix:
	openmp: [ ON, OFF ]
	options: [ -DBUILD_D=OFF, -DBUILD_4=OFF, -DBUILD_8=ON ]
	gcc-version: [12]
	include:
	- openmp: ON
	options: -DBUILD_8=ON
	gcc-version: 14

	steps:

	- name: get-gcc
	run: \|
	if [ -z $(type -P gcc-${{ matrix.gcc-version }}) ]; then
	sudo apt install gcc-${{ matrix.gcc-version }}
	fi

	- name: checkout
	uses: actions/checkout@v4
	with:
	path: ip

	- name: build
	run: \|
	sudo apt install libopenblas-serial-dev
	export CC=gcc-${{ matrix.gcc-version }} ; export FC=gfortran-${{ matrix.gcc-version }}
	cmake -S ip -B ip/build -DCMAKE_PREFIX_PATH="~/" -DOPENMP=${{ matrix.openmp }} ${{ matrix.options }} -DCMAKE_INSTALL_PREFIX=~/install -DBLA_VENDOR=OpenBLAS
	cmake --build ip/build --parallel 2 --verbose
	cmake --install ip/build
	# Ensure that manual setting of '-DBLA_VENDOR=...' is reflected in output CMake config
	if [ $(grep -c "BLA_VENDOR OpenBLAS" ~/install/lib/cmake/ip/ip-config.cmake) -eq 0 ]; then
	echo "OpenBLAS not set as BLA_VENDOR in ip-config.cmake!"
	exit 1
	fi

	- name: test
	run: ctest --test-dir ip/build --verbose --output-on-failure --rerun-failed

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