Create swiftwasm wrapper compile script

Author: zhuowei

macos/unpackPrebuilts.sh

@@ -20,7 +20,7 @@ tar xf ../../prebuilt/swiftwasm.tar.gz
 cd ..
 mv "compiler/wasi-sdk-"* "compiler/wasi-sdk"
 bash ../remove-swift-extra-files.sh || true
-rm -r compiler/wasi-sdk/opt/wasi-sdk/bin compiler/wasi-sdk/opt/wasi-sdk/lib
+rm -r compiler/wasi-sdk/opt/wasi-sdk/bin
 mkdir compiler/wasi-sdk/opt/wasi-sdk/bin
 cp tmpdir/clang+llvm-8.0.0-x86_64-apple-darwin/bin/wasm-ld compiler/wasi-sdk/opt/wasi-sdk/bin
 cp -a tmpdir/opt/swiftwasm-sdk/lib/swift/wasm compiler/opt/swiftwasm-sdk/lib/swift/wasm

sdkroot/extra_utils/generateModulemap.sh

@@ -1,2 +1,2 @@
 #!/bin/sh
-exec sed -e "s@\"/include@\"$1/include@g" glibc.modulemap
+exec sed -e "s@\"/include@\"$1/include@g" "$(dirname $0)/glibc.modulemap"

sdkroot/swiftwasm

@@ -0,0 +1,42 @@
+#!/bin/bash
+set -e
+
+if [ "$#" -lt 2 ]
+then
+	echo "usage: swiftwasm file1.swift file2.swift.... output.wasm"
+	exit 1
+fi
+sdk="$(dirname $0)"
+echo "$sdk"
+tmpobj="$(mktemp -t swiftwasm)"
+outputfile="${@: -1}"
+if [[ "$outputfile" != *.wasm ]]
+then
+	echo "output should end in .wasm"
+	exit 1
+fi
+sysroot="$(dirname $0)/wasi-sdk/opt/wasi-sdk/share/sysroot"
+
+"$sdk/extra_utils/generateModuleMap.sh" >"$sdk/opt/swiftwasm-sdk/lib/swift/wasm/wasm32/glibc.modulemap"
+
+"$sdk/opt/swiftwasm-sdk/bin/swiftc" -target wasm32-unknown-unknown-wasm \
+	-sdk "$sysroot" -O -c \
+	-o "$tmpobj" \
+	"${@:1:$#-1}"
+"$sdk/wasi-sdk/opt/wasi-sdk/bin/wasm-ld" --error-limit=0 -o "$outputfile" \
+	"$sysroot/lib/wasm32-wasi/crt1.o" \
+	"$sdk/extra_objs/swift_start.o" \
+	"$sdk/opt/swiftwasm-sdk/lib/swift_static/wasm/wasm32/swiftrt.o" \
+	"$tmpobj" \
+	"-L$sdk/opt/swiftwasm-sdk/lib/swift_static/wasm" \
+	"-L$sysroot/lib/wasm32-wasi" \
+	"-L$sdk/icu_out/lib" \
+	-lswiftCore \
+	-lc -lc++ -lc++abi -lswiftImageInspectionShared \
+	-licuuc -licudata \
+	"$sdk/wasi-sdk/opt/wasi-sdk/lib/clang/8.0.0/lib/wasi/libclang_rt.builtins-wasm32.a" \
+	"$sdk/extra_objs/fakepthread.o" \
+	"$sdk/extra_objs/fakelocaltime.o" \
+	"$sdk/extra_objs/swift_end.o" \
+	--no-gc-sections
+rm "$tmpobj"