From 5aa2a0e376b22f35babf095ab1bc83078a7bf51b Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Tue, 24 Jul 2018 14:47:35 +0200
Subject: [PATCH] build fat binary for ios

---
 .../experimental/build_native_ext_for_ios.sh  | 65 ++++++++++++-------
 .../artifacts/build_artifact_csharp_ios.sh    |  2 +-
 2 files changed, 42 insertions(+), 25 deletions(-)

diff --git a/src/csharp/experimental/build_native_ext_for_ios.sh b/src/csharp/experimental/build_native_ext_for_ios.sh
index 518390ea63b..69c9cdf021c 100755
--- a/src/csharp/experimental/build_native_ext_for_ios.sh
+++ b/src/csharp/experimental/build_native_ext_for_ios.sh
@@ -19,27 +19,44 @@ set -ex
 
 cd "$(dirname "$0")/../../.."
 
-# <iphoneos|iphonesimulator>
-SDK="iphoneos"
-# <arm64|x86_64|...>
-ARCH="arm64"
-
-PATH_AR="$(xcrun --sdk $SDK --find ar)"
-PATH_CC="$(xcrun --sdk $SDK --find clang)"
-PATH_CXX="$(xcrun --sdk $SDK --find clang++)"
-
-# TODO(jtattermusch): add  -mios-version-min=6.0 and -Wl,ios_version_min=6.0
-CPPFLAGS="-O2 -Wframe-larger-than=16384 -arch $ARCH -isysroot $(xcrun --sdk $SDK --show-sdk-path) -DPB_NO_PACKED_STRUCTS=1"
-LDFLAGS="-arch $ARCH -isysroot $(xcrun --sdk $SDK --show-sdk-path)"
-
-# TODO(jtattermusch): revisit the build arguments
-make -j4 static_csharp \
-    VALID_CONFIG_ios_$ARCH="1" \
-    CC_ios_$ARCH="$PATH_CC" \
-    CXX_ios_$ARCH="$PATH_CXX" \
-    LD_ios_$ARCH="$PATH_CC" \
-    LDXX_ios_$ARCH="$PATH_CXX" \
-    CPPFLAGS_ios_$ARCH="$CPPFLAGS" \
-    LDFLAGS_ios_$ARCH="$LDFLAGS" \
-    DEFINES_ios_$ARCH="NDEBUG" \
-    CONFIG="ios_$ARCH"
+# Usage: build <iphoneos|iphonesimulator> <arm64|x86_64|...>
+function build {
+    SDK="$1"
+    ARCH="$2"
+
+    PATH_AR="$(xcrun --sdk $SDK --find ar)"
+    PATH_CC="$(xcrun --sdk $SDK --find clang)"
+    PATH_CXX="$(xcrun --sdk $SDK --find clang++)"
+
+    # TODO(jtattermusch): add  -mios-version-min=6.0 and -Wl,ios_version_min=6.0
+    CPPFLAGS="-O2 -Wframe-larger-than=16384 -arch $ARCH -isysroot $(xcrun --sdk $SDK --show-sdk-path) -DPB_NO_PACKED_STRUCTS=1"
+    LDFLAGS="-arch $ARCH -isysroot $(xcrun --sdk $SDK --show-sdk-path)"
+
+    # TODO(jtattermusch): revisit the build arguments
+    make -j4 static_csharp \
+        VALID_CONFIG_ios_$ARCH="1" \
+        CC_ios_$ARCH="$PATH_CC" \
+        CXX_ios_$ARCH="$PATH_CXX" \
+        LD_ios_$ARCH="$PATH_CC" \
+        LDXX_ios_$ARCH="$PATH_CXX" \
+        CPPFLAGS_ios_$ARCH="$CPPFLAGS" \
+        LDFLAGS_ios_$ARCH="$LDFLAGS" \
+        DEFINES_ios_$ARCH="NDEBUG" \
+        CONFIG="ios_$ARCH"
+}
+
+# Usage: fatten <grpc_csharp_ext|...>
+function fatten {
+    LIB_NAME="$1"
+
+    mkdir -p libs/ios
+    lipo -create -output libs/ios/lib$LIB_NAME.a \
+        libs/ios_arm64/lib$LIB_NAME.a \
+        libs/ios_x86_64/lib$LIB_NAME.a
+}
+
+build iphoneos arm64
+build iphonesimulator x86_64
+
+fatten grpc
+fatten grpc_csharp_ext
diff --git a/tools/run_tests/artifacts/build_artifact_csharp_ios.sh b/tools/run_tests/artifacts/build_artifact_csharp_ios.sh
index 8b3c7a17b38..0d0a9c86da7 100755
--- a/tools/run_tests/artifacts/build_artifact_csharp_ios.sh
+++ b/tools/run_tests/artifacts/build_artifact_csharp_ios.sh
@@ -20,4 +20,4 @@ cd "$(dirname "$0")/../../.."
 src/csharp/experimental/build_native_ext_for_ios.sh
 
 mkdir -p "${ARTIFACTS_OUT}"
-cp libs/ios_arm64/libgrpc_csharp_ext.a libs/ios_arm64/libgrpc.a "${ARTIFACTS_OUT}"
+cp libs/ios/libgrpc_csharp_ext.a libs/ios/libgrpc.a "${ARTIFACTS_OUT}"