extra unit tests infrastructure and first workflow job to test it #7012

	# This tests the C example, and it uses a similar build script to the one used
	# by JuMP when building HiGHS:
	# https://github.com/JuliaPackaging/Yggdrasil/blob/master/H/HiGHS/build_tarballs.jl
	name: test-c-example

	on: [push, pull_request]

	jobs:
	fast-build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Create Build Environment
	run: \|
	mkdir build
	mkdir installs
	- name: Build HiGHS library
	shell: bash
	working-directory: build
	run: \|
	cmake \
	-DCMAKE_INSTALL_PREFIX=../installs/highs \
	-DCMAKE_BUILD_TYPE=Release \
	-DBUILD_SHARED_LIBS=ON \
	-DFAST_BUILD=ON \
	$GITHUB_WORKSPACE
	cmake --build . --config Release --parallel
	make install
	- name: Compile and test C example
	shell: bash
	run: \|
	gcc $GITHUB_WORKSPACE/examples/call_highs_from_c.c \
	-o c_example \
	-I installs/highs/include/highs \
	-L installs/highs/lib -lhighs
	LD_LIBRARY_PATH=installs/highs/lib ./c_example

	fast-build-off:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Create Build Environment
	run: \|
	mkdir build
	mkdir installs
	- name: Build HiGHS library
	shell: bash
	working-directory: build
	run: \|
	cmake \
	-DCMAKE_INSTALL_PREFIX=../installs/highs \
	-DCMAKE_BUILD_TYPE=Release \
	-DBUILD_SHARED_LIBS=ON \
	-DFAST_BUILD=OFF \
	$GITHUB_WORKSPACE
	cmake --build . --config Release --parallel
	make install
	- name: Compile and test C example
	shell: bash
	run: \|
	gcc $GITHUB_WORKSPACE/examples/call_highs_from_c.c \
	-o c_example \
	-I installs/highs/include/highs \
	-L installs/highs/lib -lhighs
	LD_LIBRARY_PATH=installs/highs/lib ./c_example

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