From 3d8164c06d869478f434082a561ef33e19bb0585 Mon Sep 17 00:00:00 2001
From: Linus Gasser <ineiti@gasser.blue>
Date: Mon, 10 May 2021 20:25:49 +0200
Subject: [PATCH] Build ios

---
 .gitignore    |  1 +
 Makefile      | 19 +++++++++++++++++++
 clangwrap.sh  | 14 ++++++++++++++
 switch-ffi.sh |  6 +++---
 4 files changed, 37 insertions(+), 3 deletions(-)
 create mode 100644 clangwrap.sh

diff --git a/.gitignore b/.gitignore
index dbb20d7..53069a5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ cwtch.aar
 libCwtch.h
 libCwtch.so
 libCwtch.dll
+ios/
diff --git a/Makefile b/Makefile
index 179e701..a275090 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+IOS_OUT := ./ios
+
 .PHONY: all linux android windows clean
 
 DEFAULT_GOAL: linux
@@ -24,3 +26,20 @@ libCwtch.dll: lib.go
 
 clean: 
 	rm -f cwtch.aar cwtch_go.apk libCwtch.h libCwtch.so cwtch-sources.jar libCwtch.dll
+
+ios-arm64:
+	CGO_ENABLED=1 \
+	GOOS=darwin \
+	GOARCH=arm64 \
+	CGO_CFLAGS="-fembed-bitcode" \
+	go build -buildmode=c-archive -tags ios -o $(IOS_OUT)/arm64.a .
+
+ios-x86_64:
+	CGO_ENABLED=1 \
+	GOOS=darwin \
+	GOARCH=amd64 \
+	go build -buildmode=c-archive -tags ios -o $(IOS_OUT)/x86_64.a .
+
+ios: ios-arm64 ios-x86_64
+	lipo $(IOS_OUT)/x86_64.a $(IOS_OUT)/arm64.a -create -output $(IOS_OUT)/cwtch.a
+	cp $(IOS_OUT)/arm64.h $(IOS_OUT)/cwtch.h
diff --git a/clangwrap.sh b/clangwrap.sh
new file mode 100644
index 0000000..763187e
--- /dev/null
+++ b/clangwrap.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# go/clangwrap.sh
+
+SDK_PATH=`xcrun --sdk $SDK --show-sdk-path`
+CLANG=`xcrun --sdk $SDK --find clang`
+
+if [ "$GOARCH" == "amd64" ]; then
+    CARCH="x86_64"
+elif [ "$GOARCH" == "arm64" ]; then
+    CARCH="arm64"
+fi
+
+exec $CLANG -arch $CARCH -isysroot $SDK_PATH -mios-version-min=10.0 "$@"
diff --git a/switch-ffi.sh b/switch-ffi.sh
index 7985e9f..a75c3b3 100755
--- a/switch-ffi.sh
+++ b/switch-ffi.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
 
-sed -i "s/^package cwtch/\/\/package cwtch/" lib.go
-sed -i "s/^\/\/package main/package main/" lib.go
-sed -i "s/^\/\/func main()/func main()/" lib.go
\ No newline at end of file
+perl -pi -e "s/^package cwtch/\/\/package cwtch/" lib.go
+perl -pi -e "s/^\/\/package main/package main/" lib.go
+perl -pi -e "s/^\/\/func main()/func main()/" lib.go