Use https://github.com/JDevlieghere/LibEBC to check for bitcode presence.

universal-framework.sh

#!/bin/bash

# (0) project-related definitions
PROJECT_NAME="AlgoreKit"

BUILD_DIR="./build"
CONFIGURATION="Release"
UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal

# (1) make sure the output directory exists
mkdir -p "${UNIVERSAL_OUTPUTFOLDER}"

# (2) build device and simulator versions
xcodebuild -target "${PROJECT_NAME}" \
    BITCODE_GENERATION_MODE=bitcode \
    ONLY_ACTIVE_ARCH=NO \
    -configuration ${CONFIGURATION} \
    -sdk iphoneos \
    BUILD_DIR="${BUILD_DIR}" \
    BUILD_ROOT="${BUILD_ROOT}" \
    clean build

xcodebuild -target \
    "${PROJECT_NAME}"\
    -configuration ${CONFIGURATION} \
    -sdk iphonesimulator \
    ONLY_ACTIVE_ARCH=NO \
    BUILD_DIR="${BUILD_DIR}" \
    BUILD_ROOT="${BUILD_ROOT}" \
    clean build

# (3) copy the framework structure (from iphoneos build) to the universal folder
cp -R "${BUILD_DIR}/${CONFIGURATION}-iphoneos/${PROJECT_NAME}.framework" "${UNIVERSAL_OUTPUTFOLDER}/"

# (4) copy swiftmodules from simulator build as well
cp -R "${BUILD_DIR}/${CONFIGURATION}-iphonesimulator/${PROJECT_NAME}.framework/Modules/${PROJECT_NAME}.swiftmodule" "${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/Modules/"

# (5) create universal binary file using lipo and place the combined executable in the copied framework directory
lipo -create -output "${UNIVERSAL_OUTPUTFOLDER}/${PROJECT_NAME}.framework/${PROJECT_NAME}" \
    "${BUILD_DIR}/${CONFIGURATION}-iphonesimulator/${PROJECT_NAME}.framework/${PROJECT_NAME}" \
    "${BUILD_DIR}/${CONFIGURATION}-iphoneos/${PROJECT_NAME}.framework/${PROJECT_NAME}"

# (6) convenience step to open the universal folder in Finder
open "${UNIVERSAL_OUTPUTFOLDER}"