Add a basic cmake test to see if the package is imported correctly

debian/tests/cmake-test

@@ -0,0 +1,33 @@
+#!/bin/sh
+
+set -e
+
+# Presence of $ADTTMP implies that someone will handle cleanup for us, so we
+# can avoid duplicating the effort (signal handling, etc.) here.
+if [ -z "$ADTTMP" ]
+then
+	echo "Required envvar ADTTMP \"$ADTTMP\" is not set" >&2
+	exit 1
+fi
+
+
+cd "$ADTTMP"
+cat <<EOF > CMakeLists.txt
+cmake_minimum_required(VERSION 2.6.2)
+find_package(LLVM 9.0.0 REQUIRED
+  COMPONENTS
+    Analysis
+    BitReader
+    BitWriter
+    Core
+    Support
+    TransformUtils
+    llvm-as
+    llvm-dis
+)
+
+EOF
+
+
+mkdir build && cd build
+cmake ..

debian/tests/control

@@ -4,3 +4,7 @@ Depends: @, cmake, g++, file, dpkg-dev
 # dbgsym packages not being available in testing
 # clang-9-dbgsym, libclang1-9-dbgsym
 Restrictions: allow-stderr
+
+
+Test: cmake-test
+Depends: gcc, build-essential, cmake, llvm-9-dev, libclang-common-9-dev