Add FreeBSD task on Cirrus CI

.cirrus.yml

@@ -0,0 +1,28 @@
+freebsd_instance:
+  image_family: freebsd-13-2
+
+task:
+  env:
+    PERL_VERSION: "5.38"
+  install_script:
+    - sudo pkg install -y perl$PERL_VERSION
+    - |
+      export MYPERL=$( pkg info -l perl$PERL_VERSION | grep -m1 '/usr/local/bin/perl5[0-9.]\+$' )
+      echo "MYPERL=$MYPERL" >> $CIRRUS_ENV
+    - $MYPERL -V
+    - cc -v
+    - curl -L https://cpanmin.us | $MYPERL - --sudo App::cpanminus local::lib
+  deps_script:
+    - eval $( $MYPERL -Mlocal::lib=local )
+    # Update PPPort
+    - $MYPERL -S cpanm -nq Devel::PPPort && ( cd Basic/Core && $MYPERL -MDevel::PPPort -e'Devel::PPPort::WriteFile' )
+    # Configure deps
+    - $MYPERL -S cpanm -nq ExtUtils::MakeMaker Devel::CheckLib File::Which ExtUtils::Depends Inline::C
+    # Deps
+    - $MYPERL -S cpanm -nq --installdeps .
+  build_script:
+    - eval $( $MYPERL -Mlocal::lib=local )
+    - make # -j $( sysctl -n hw.ncpu )
+  test_script:
+    - eval $( $MYPERL -Mlocal::lib=local )
+    - make test