Add temporary CI workflow

Author: oscarbenjamin

.github/workflows/build_test.yml

@@ -0,0 +1,21 @@
+name: Build Test
+
+on: [push, pull_request]
+
+jobs:
+
+  build_test:
+    name: Build with flint ${{ matrix.flintver }}
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+      matrix:
+        # All supported versions
+        flintver: ['3.0.0', '3.0.1', '3.1.0']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.12
+      - run: bin/build_install.sh . ${{ matrix.flintver }}
+      - run: python -m flint.test

bin/build_install.sh

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+#!/bin/bash
+
+set -o errexit
+
+FLINTVER=$1
+
+# Install GMP, MPFR and build tools from Ubuntu repos
+sudo apt-get update
+sudo apt-get install libgmp-dev libmpfr-dev xz-utils ninja-build
+
+# Build flint and install to /usr/local
+curl -O -L https://www.flintlib.org/flint-$FLINTVER.tar.gz
+tar xf flint-$FLINTVER.tar.gz
+cd flint-$FLINTVER
+  ./bootstrap.sh
+  ./configure --disable-static
+  make -j
+  sudo make install
+cd ..
+
+# Ensure the the libflint.so is found at runtime
+sudo ldconfig /usr/local/lib
+
+echo "Contents of /usr/local/lib:"
+ls -l /usr/local/lib
+echo
+
+echo "Contents of /usr/local/lib/pkgconfig/flint.pc:"
+cat /usr/local/lib/pkgconfig/flint.pc
+echo
+
+# Build python-flint using meson-python. This will use pkgconfig to find the
+# flint library installed in /usr/local.
+pip install .