From 7754bd07114e16f3c266d1c5febb1181bfaa006d Mon Sep 17 00:00:00 2001
From: Ryo Aoyama <r.fe51028.r@gmail.com>
Date: Mon, 8 Apr 2019 15:19:30 +0900
Subject: [PATCH] Use static stdlib

---
 .gitignore    |  3 +++
 Makefile      | 18 ++++++++++++++++--
 Package.swift |  2 +-
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index 972cb81..b7365c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,3 +55,6 @@ Carthage/
 
 ## Tests
 !/Tests/AcknowledgementsPlistTests/Dummy/pcProject/Carthage
+
+## Builds
+portable_acknowledgementsplist.zip
diff --git a/Makefile b/Makefile
index ab7a01f..79afa6f 100644
--- a/Makefile
+++ b/Makefile
@@ -2,17 +2,31 @@ TEMP_ZIP_DIR=./tmp/portable_zip
 SWIFT_BIN_DIR=$(shell swift build -c release --show-bin-path)
 BIN_NAME=acknowledgementsplist
 
+# refer: https://github.com/realm/SwiftLint/pull/2682
+SWIFT_BUILD_FLAGS=-c release
+UNAME=$(shell uname)
+ifeq ($(UNAME), Darwin)
+USE_SWIFT_STATIC_STDLIB:=$(shell test -d $$(dirname $$(xcrun --find swift))/../lib/swift_static/macosx && echo yes)
+ifeq ($(USE_SWIFT_STATIC_STDLIB), yes)
+SWIFT_BUILD_FLAGS+= -Xswiftc -static-stdlib
+endif
+endif
+
+TEMP_ZIP_DIR=./tmp/portable_zip
+SWIFT_BIN_DIR=$(shell swift build $(SWIFT_BUILD_FLAGS) --show-bin-path)
+BIN_NAME=acknowledgementsplist
+
 .PHONY: project release_build portable_zip
 
 project:
 	swift package generate-xcodeproj
 
 release_build:
-	swift build -c release
+	swift build $(SWIFT_BUILD_FLAGS)
 
 portable_zip: release_build
 	mkdir -p $(TEMP_ZIP_DIR)
 	cp -f $(SWIFT_BIN_DIR)/$(BIN_NAME) $(TEMP_ZIP_DIR)
 	cp -f LICENSE $(TEMP_ZIP_DIR)
 	(cd $(TEMP_ZIP_DIR); zip -yr - $(BIN_NAME) LICENSE) > ./portable_acknowledgementsplist.zip
-	rm -rf $(TEMP_ZIP_DIR)
\ No newline at end of file
+	rm -rf $(TEMP_ZIP_DIR)
diff --git a/Package.swift b/Package.swift
index 9360392..142804c 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.0
+// swift-tools-version:4.2
 
 import PackageDescription