Add files to build and test on Github Actions.

.github/workflows/ci-linux.yml

@@ -0,0 +1,53 @@
+name: ci-linux
+on:
+  push:
+    branches:
+      - "*"
+jobs:
+  ci-linux:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        pgopt:
+          - base
+          - disable-atomics-spinlocks
+          - cache-release
+    env:
+      PG_TEST_EXTRA: "ssl kerberos"
+      PGOPT: ${{ matrix.pgopt }}
+    steps:
+    - uses: actions/checkout@v2
+    - name: apt
+      run: |
+        sudo apt-get --yes update
+        sudo apt-get --yes install gcc libreadline-dev flex bison make perl libipc-run-perl clang llvm-dev libperl-dev libpython2-dev tcl-dev libldap2-dev libicu-dev docbook docbook-xml docbook-xsl fop libxml2-utils xsltproc opensp krb5-admin-server krb5-kdc krb5-user slapd ldap-utils libssl-dev pkg-config locales-all gdb
+    - name: configure
+      run: |
+        export CPPFLAGS="-DENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS $CPPFLAGS"
+        if [ "${PGOPT}" = "cache-release" ]; then
+          export CPPFLAGS="-DRELCACHE_FORCE_RELEASE -DCATCACHE_FORCE_RELEASE $CPPFLAGS"
+        fi
+        CONFOPT=
+        if [ "${PGOPT}" = "disable-atomics-spinlocks" ]; then
+          export CONFOPT="--disable-atomics --disable-spinlocks $CONFOPT"
+        fi
+        ./configure --prefix=$HOME/install --enable-debug --enable-cassert --enable-tap-tests -with-tcl --with-python --with-perl --with-ldap --with-openssl --with-icu --with-llvm $CONFOPT
+    - name: make
+      run: |
+        echo "COPT=-Wall -Werror" > src/Makefile.custom
+        make -s -j 4 all contrib docs
+    - name: make install
+      run: |
+        make -s install
+    - name: pg_config
+      run: |
+        $HOME/install/bin/pg_config
+    - name: make check-world
+      run: |
+        make -s -j 4 check-world
+    - name: after failure
+      if: failure()
+      run: |
+        for f in $(find . -name regression.diffs) ; do echo "========= Contents of $f" ; head -1000 $f ; done
+        for f in $(find . -name install.log) ; do echo "========= Contents of $f" ; tail -100 $f ; done