Add cmake-package command to super-test.sh

Adds a new command to super-test.sh:

  ./super-test.sh cmake-package <config>

where <config> is one of:

- autotools-shared
- autotools-static
- cmake-shared
- cmake-static

This command tests the CMake config package files installed by the given build configuration. For now, that test consists of building the samples against an installation of Cap'n Proto.

super-test.sh

@@ -165,6 +165,83 @@ while [ $# -gt 0 ]; do
       cd cmake-build
       doit cmake -G "Unix Makefiles" ..
       doit make -j$PARALLEL check
+      exit 0
+      ;;
+    cmake-package )
+      # Test that a particular configuration of Cap'n Proto can be discovered and configured against
+      # by a CMake project using the find_package() command. This is currently implemented by
+      # building the samples against the desired configuration.
+      #
+      # Takes one argument, the build configuration, which must be one of:
+      #
+      #   autotools-shared
+      #   autotools-static
+      #   cmake-shared
+      #   cmake-static
+
+      if [ "$#" -ne 2 ]; then
+        echo "usage: $0 cmake-package CONFIGURATION" >&2
+        echo "  where CONFIGURATION is one of {autotools,cmake}-{static,shared}" >&2
+        exit 1
+      fi
+
+      CONFIGURATION=$2
+      WORKSPACE=$(pwd)/cmake-package/$CONFIGURATION
+      SOURCE_DIR=$(pwd)/c++
+
+      rm -rf $WORKSPACE
+      mkdir -p $WORKSPACE/{build,build-samples,inst}
+
+      # Configure
+      cd $WORKSPACE/build
+      case "$CONFIGURATION" in
+        autotools-shared )
+          autoreconf -i $SOURCE_DIR
+          doit $SOURCE_DIR/configure --prefix="$WORKSPACE/inst" --disable-static
+          ;;
+        autotools-static )
+          autoreconf -i $SOURCE_DIR
+          doit $SOURCE_DIR/configure --prefix="$WORKSPACE/inst" --disable-shared
+          ;;
+        cmake-shared )
+          doit cmake $SOURCE_DIR -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX="$WORKSPACE/inst" \
+              -DBUILD_TESTING=OFF -DBUILD_SHARED_LIBS=ON
+          # The CMake build does not currently set the rpath of the capnp compiler tools.
+          export LD_LIBRARY_PATH="$WORKSPACE/inst/lib"
+          ;;
+        cmake-static )
+          doit cmake $SOURCE_DIR -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX="$WORKSPACE/inst" \
+              -DBUILD_TESTING=OFF -DBUILD_SHARED_LIBS=OFF
+          ;;
+        * )
+          echo "Unrecognized cmake-package CONFIGURATION argument, must be {autotools,cmake}-{static,shared}" >&2
+          exit 1
+          ;;
+      esac
+
+      # Build and install
+      doit make -j$PARALLEL install
+
+      # Configure, build, and execute the samples.
+      cd $WORKSPACE/build-samples
+      doit cmake $SOURCE_DIR/samples -G "Unix Makefiles" -DCMAKE_PREFIX_PATH="$WORKSPACE/inst" \
+          -DCAPNPC_FLAGS=--no-standard-import -DCAPNPC_IMPORT_DIRS="$WORKSPACE/inst/include"
+      doit make -j$PARALLEL
+
+      echo "@@@@ ./addressbook (in various configurations)"
+      ./addressbook write | ./addressbook read
+      ./addressbook dwrite | ./addressbook dread
+      rm -f /tmp/capnp-calculator-example-$$
+      ./calculator-server unix:/tmp/capnp-calculator-example-$$ &
+      sleep 0.1
+      ./calculator-client unix:/tmp/capnp-calculator-example-$$
+      kill %+
+      wait %+ || true
+
+      echo "========================================================================="
+      echo "Cap'n Proto ($CONFIGURATION) installs a working CMake config package."
+      echo "========================================================================="
+
       exit 0
       ;;
     exotic )