Build liblz4.a for iphone

.gitignore

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+android-tools/build
+output

.gitmodules

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 [submodule "android-tools"]
 	path = android-tools
 	url = https://github.com/nmeum/android-tools.git
+[submodule "ios-cmake"]
+	path = ios-cmake
+	url = https://github.com/leetal/ios-cmake.git
+[submodule "external/lz4"]
+	path = external/lz4
+	url = https://android.googlesource.com/platform/external/lz4

porting/Makefile

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+iphone: lz4
+	@echo "|-> Making liblz4 ..."
+
+lz4: lz4/iphoneos/arm64 lz4/iphonesimulator/x86_64
+
+lz4/%:
+	@echo "|-> Making $@ ..."
+	TARGET=$@ OUTPUT=../output bash ./scripts/make-lz4.sh

porting/scripts/defines.sh

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+# Common Supports:
+# - TARGET=lz4/iphoneos/arm64
+# - OUTPUT=...
+
+[[ -z "$TARGET" ]] && echo "** ERROR: TARGET is REQUIRED." && exit 1;
+[[ -z "$OUTPUT" ]] && echo "** ERROR: OUTPUT is REQUIRED." && exit 1;
+
+LIB_NAME=$(echo "$TARGET" | cut -d/ -f1);
+SDK_NAME=$(echo "$TARGET" | cut -d/ -f2);
+ARCH_NAME=$(echo "$TARGET" | cut -d/ -f3);
+
+# Src root
+SOURCE_ROOT=$(cd $(dirname $0)/../.. && pwd);
+
+# Prepare output path
+FULL_OUTPUT=$(cd $OUTPUT && pwd)/$SDK_NAME/$ARCH_NAME;
+[[ ! -d $FULL_OUTPUT ]] && mkdir -p $FULL_OUTPUT;
+
+# For iphone, change to platform
+PLATFORM=$([[ $SDK_NAME == iphoneos ]] && echo "OS64" || echo "SIMULATOR64");
+
+# Setup iphone deploy target
+DEPLOYMENT_TARGET=10.0;
+
+# Setup toolchains
+if [[ $SDK_NAME == *iphone* ]]; then
+	CMAKE_TOOLCHAIN_FILE=$SOURCE_ROOT/ios-cmake/ios.toolchain.cmake;
+fi

porting/scripts/make-lz4.sh

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+#!/bin/bash
+
+. $(dirname $0)/defines.sh;
+
+echo " - Lib Name: $LIB_NAME";
+echo " - SDK Name: $SDK_NAME";
+echo " - Arch Name: $ARCH_NAME";
+echo " - CMake Toolchain: $CMAKE_TOOLCHAIN_FILE";
+
+cmake_root=$SOURCE_ROOT/external/lz4/contrib/cmake_unofficial/out;
+
+# Clean built products
+[[ -d "$cmake_root" ]] && rm -rfv "$cmake_root";
+mkdir -pv "$cmake_root";
+
+cd "$cmake_root";
+
+cmake .. -G Xcode -DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOLCHAIN_FILE -DPLATFORM=$PLATFORM \
+	-DDEPLOYMENT_TARGET=$DEPLOYMENT_TARGET -DBUILD_STATIC_LIBS=ON -DBUILD_SHARED_LIBS=OFF;
+cmake --build . --config Release --target lz4_static;
+find . -name "*.a" -exec cp -av {} $FULL_OUTPUT \;