Support for creating .xcframework

* `make macOS` builds a universal framework
* `make xcframework` builds an .xcframework containing frameworks for macOS (universal), iOS, and iOS Simulator
* Addresses a compiler warning

CMakeLists.txt

@@ -338,7 +338,9 @@ endif ()
 if (MACOS_FRAMEWORK)
 	set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DOMIT_JSON_SUPPORT=1")
 	set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DOMIT_JSON_SUPPORT=1")
-	include_directories ("/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include/")
+	set (CMAKE_XCODE_ATTRIBUTE_ARCHS "$(ARCHS_STANDARD)")
+	set (CMAKE_XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH NO)
+	include_directories ("/Library/Developer/CommandLineTools/SDKs/MacOSX11.0.sdk/usr/include/")
 endif ()
 
 # -----------------------------------------------------------------------------
@@ -486,7 +488,7 @@ if (IN_XCODE)
 		FRAMEWORK_VERSION A
 		DEFINES_MODULE TRUE
 		MACOSX_FRAMEWORK_IDENTIFIER com.cmake.${XCODE_FRAMEWORK_NAME}
-		MODULE_MAP "${PROJ_DIR}/ports/module.modulemap"
+		MODULEMAP_FILE "${PROJ_DIR}/ports/module.modulemap"
 		PUBLIC_HEADER "${frameworkHeaderGlob}"
 		XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY "iPhone Developer"
 	)

Makefile

@@ -69,6 +69,13 @@ macos_release:
 	$(DIST_BUILD_SCRIPT) macos "release"
 macos: macos_debug macos_release
 
+# xcframework
+xcframework_debug:
+	$(DIST_BUILD_SCRIPT) xcframework "debug"
+xcframework_release:
+	$(DIST_BUILD_SCRIPT) xcframework "release"
+xcframework: xcframework_release
+
 # iOS
 ios_debug:
 	$(DIST_BUILD_SCRIPT) ios "debug"

dist.sh

@@ -181,18 +181,44 @@ macos()
     cd $XCODE_MACOS_PROJ_DIR
     # Framework
     xcodebuild -target zt -configuration "$UPPERCASE_CONFIG" -sdk "macosx"
-    # NOTE: We build the static and dynamic editions in host()
-    # Static library (libzt.a)
-    #xcodebuild -target zt-static -configuration "$UPPERCASE_CONFIG" -sdk "macosx"
-    # Dynamic library (libzt.dylib)
-    #xcodebuild -target zt-shared -configuration "$UPPERCASE_CONFIG" -sdk "macosx"
     cd -
-    OUTPUT_DIR=$(pwd)/lib/$1/macos-$(uname -m)
+    OUTPUT_DIR=$(pwd)/lib/$1/macos-universal
     mkdir -p $OUTPUT_DIR
     rm -rf $OUTPUT_DIR/zt.framework # Remove prior to move to prevent error
     mv $XCODE_MACOS_PROJ_DIR/$UPPERCASE_CONFIG/* $OUTPUT_DIR
 }
 
+# Build xcframework
+xcframework()
+{
+    if [[ ! $OSNAME = *"darwin"* ]]; then
+        exit 0
+    fi
+    generate_projects # if needed
+    echo "Executing task: " ${FUNCNAME[ 0 ]} "(" $1 ")"
+    UPPERCASE_CONFIG="$(tr '[:lower:]' '[:upper:]' <<< ${1:0:1})${1:1}"
+    
+    OUTPUT_DIR=$(pwd)/lib/$1
+    
+    cd $XCODE_MACOS_PROJ_DIR
+    xcodebuild -target zt -configuration "$UPPERCASE_CONFIG" -sdk "macosx"
+
+    cd $XCODE_IOS_PROJ_DIR
+    xcodebuild -arch arm64 -target zt -configuration "$UPPERCASE_CONFIG" -sdk "iphoneos"
+
+    cd $XCODE_IOS_SIMULATOR_PROJ_DIR
+    xcodebuild -target zt -configuration "$UPPERCASE_CONFIG" -sdk "iphonesimulator"
+
+    mkdir -p $OUTPUT_DIR
+
+    rm -rf $OUTPUT_DIR/zt.xcframework # Remove prior to move to prevent error
+    xcodebuild -create-xcframework \
+        -framework $XCODE_MACOS_PROJ_DIR/$UPPERCASE_CONFIG/zt.framework \
+        -framework $XCODE_IOS_PROJ_DIR/$UPPERCASE_CONFIG-iphoneos/zt.framework \
+        -framework $XCODE_IOS_SIMULATOR_PROJ_DIR/$UPPERCASE_CONFIG-iphonesimulator/zt.framework \
+        -output $OUTPUT_DIR/zt.xcframework
+}
+
 # Build Java JAR for current host (uses JNI)
 host_jar()
 {

src/Controls.cpp

@@ -253,6 +253,7 @@ int zts_restart()
 	_userCallbackMethodRef = _tmpUserCallbackMethodRef;
 	return zts_start(userProvidedPath.c_str(), NULL, userProvidedPort);
 #else
+    return ZTS_ERR_OK;
 	//return zts_start(userProvidedPath.c_str(), _tmpUserEventCallbackFunc, userProvidedPort);
 #endif
 }