[Static SDK for Linux] Add a sanity check (#446)

* [Static SDK for Linux] Add a sanity check.

Build a simple Hello World program after building the SDK, to check
that the SDK actually works.

* [Static SDK for Linux] Tweak at-desk build script slightly.

Add support for `i386` as the output of `arch`.

* [Static SDK for Linux] Fix typo.

This now successfully builds and runs a Hello World program as part
of the Static SDK build.

Author: al45tair

swift-ci/sdks/static-linux/build

@@ -22,7 +22,7 @@ case $(arch) in
     arm64|aarch64)
         OS_ARCH_SUFFIX=-aarch64
         ;;
-    amd64|x86_64)
+    i386|amd64|x86_64)
         OS_ARCH_SUFFIX=
         ;;
     *)
@@ -32,7 +32,7 @@ case $(arch) in
 esac
 
 # Build the Docker image
-$DOCKER build --build-arg OS_ARCH_SUFFIX=$OS_ARCH_SUFFIX -t static-swift-linux .
+$DOCKER build $DOCKER_EXTRA_ARGS --build-arg OS_ARCH_SUFFIX=$OS_ARCH_SUFFIX -t static-swift-linux .
 
 # Check-out the sources
 scripts/fetch-source.sh --clone-with-ssh --source-dir source
@@ -43,5 +43,6 @@ mkdir -p products
 $DOCKER run -it --rm \
           -v ./source:/source \
           -v ./products:/products \
+          -m 10G \
           static-swift-linux \
           /scripts/build.sh --source-dir /source --products-dir /products

swift-ci/sdks/static-linux/scripts/build.sh

@@ -926,3 +926,27 @@ quiet_pushd "${build_dir}"
 mkdir -p "${products_dir}"
 tar cvzf "${products_dir}/${bundle}.tar.gz" "${bundle}"
 quiet_popd
+
+header "Install SDK"
+swift sdk install "${products_dir}/${bundle}.tar.gz"
+
+header "Build Hello World"
+quiet_pushd "${build_dir}"
+mkdir -p hello-world
+cd hello-world
+swift package init --type executable
+for arch in $archs; do
+    swift build --swift-sdk ${arch}-swift-linux-musl
+done
+quiet_popd
+
+header "Run Hello World"
+quiet_pushd "${build_dir}/hello-world"
+native_arch=$(uname -p)
+native_binary=.build/${native_arch}-swift-linux-musl/debug/hello-world
+if [[ -x "${native_binary}" ]]; then
+    "${native_binary}"
+else
+    echo "No binary for ${native_arch}"
+fi
+quiet_popd