A shell script to build openssl for iOS and Mac. >>>>> It currently builds: Mac (i386, x86_64) >>>>> iOS (armv7, arm64) >>>>> iOS Simulator (i386, x86_64) >>>>> Updated to work with Xcode 7 and produce bitcode enabled binaries >>>>> Minimum deployment target can be easily configured

openssl-build.sh

#!/bin/bash

# This script builds the iOS and Mac openSSL libraries with Bitcode enabled
# Download openssl http://www.openssl.org/source/ and place the tarball next to this script

# Credits:
# https://github.com/st3fan/ios-openssl
# https://github.com/x2on/OpenSSL-for-iPhone/blob/master/build-libssl.sh
# Peter Steinberger, PSPDFKit GmbH, @steipete.
# Doron Adler, GlideTalk, @Norod78

# Updated to work with Xcode 7 and iOS 9

set -e

###################################
# 		 OpenSSL Version
###################################
OPENSSL_VERSION="openssl-1.0.2d"
###################################

###################################
# 		 SDK Version
###################################
IOS_SDK_VERSION=$(xcodebuild -version -sdk iphoneos | grep SDKVersion | cut -f2 -d ':' | tr -d '[[:space:]]')
###################################

################################################
# 		 Minimum iOS deployment target version
################################################
MIN_IOS_VERSION="7.0"

################################################
# 		 Minimum OS X deployment target version
################################################
MIN_OSX_VERSION="10.7"

echo "----------------------------------------"
echo "OpenSSL version: ${OPENSSL_VERSION}"
echo "iOS SDK version: ${IOS_SDK_VERSION}"
echo "iOS deployment target: ${MIN_IOS_VERSION}"
echo "OS X deployment target: ${MIN_OSX_VERSION}"
echo "----------------------------------------"
echo " "

DEVELOPER=`xcode-select -print-path`
buildMac()
{
	ARCH=$1
	echo "Start Building ${OPENSSL_VERSION} for ${ARCH}"
	TARGET="darwin-i386-cc"
	if [[ $ARCH == "x86_64" ]]; then
		TARGET="darwin64-x86_64-cc"
	fi
	
	export CC="${BUILD_TOOLS}/usr/bin/clang -mmacosx-version-min=${MIN_OSX_VERSION}"
	pushd . > /dev/null
	cd "${OPENSSL_VERSION}"
	echo "Configure"
	./Configure ${TARGET} --openssldir="/tmp/${OPENSSL_VERSION}-${ARCH}" &> "/tmp/${OPENSSL_VERSION}-${ARCH}.log"
	make >> "/tmp/${OPENSSL_VERSION}-${ARCH}.log" 2>&1
	echo "make install"
	make install >> "/tmp/${OPENSSL_VERSION}-${ARCH}.log" 2>&1
	echo "make clean"
	make clean >> "/tmp/${OPENSSL_VERSION}-${ARCH}.log" 2>&1
	popd > /dev/null
	
	echo "Done Building ${OPENSSL_VERSION} for ${ARCH}"
}
buildIOS()
{
	ARCH=$1
	echo "Start Building ${OPENSSL_VERSION} for ${PLATFORM} ${IOS_SDK_VERSION} ${ARCH}"
	
	pushd . > /dev/null
	cd "${OPENSSL_VERSION}"
  
	if [[ "${ARCH}" == "i386" || "${ARCH}" == "x86_64" ]]; then
		PLATFORM="iPhoneSimulator"
	else
		PLATFORM="iPhoneOS"
		sed -ie "s!static volatile sig_atomic_t intr_signal;!static volatile intr_signal;!" "crypto/ui/ui_openssl.c"
	fi
  
	export $PLATFORM
	export CROSS_TOP="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer"
	export CROSS_SDK="${PLATFORM}${IOS_SDK_VERSION}.sdk"
	export BUILD_TOOLS="${DEVELOPER}"
	export CC="${BUILD_TOOLS}/usr/bin/gcc -fembed-bitcode -mios-version-min=${MIN_IOS_VERSION} -arch ${ARCH}"
	
	echo "Configure"
	if [[ "${ARCH}" == "x86_64" ]]; then
		./Configure darwin64-x86_64-cc --openssldir="/tmp/${OPENSSL_VERSION}-iOS-${ARCH}" &> "/tmp/${OPENSSL_VERSION}-iOS-${ARCH}.log"
	else
		./Configure iphoneos-cross --openssldir="/tmp/${OPENSSL_VERSION}-iOS-${ARCH}" &> "/tmp/${OPENSSL_VERSION}-iOS-${ARCH}.log"
	fi
	# add -isysroot to CC=
	sed -ie "s!^CFLAG=!CFLAG=-isysroot ${CROSS_TOP}/SDKs/${CROSS_SDK} -mios-version-min=${MIN_IOS_VERSION} !" "Makefile"
	echo "make"
	make >> "/tmp/${OPENSSL_VERSION}-iOS-${ARCH}.log" 2>&1
	echo "make install"
	make install >> "/tmp/${OPENSSL_VERSION}-iOS-${ARCH}.log" 2>&1
	echo "make clean"
	make clean  >> "/tmp/${OPENSSL_VERSION}-iOS-${ARCH}.log" 2>&1
	popd > /dev/null
	
	echo "Done Building ${OPENSSL_VERSION} for ${ARCH}"
}
echo "Cleaning up"
rm -rf include/openssl/* lib/*
rm -rf /tmp/${OPENSSL_VERSION}-*
rm -rf ${OPENSSL_VERSION}
mkdir -p lib/iOS
mkdir -p lib/Mac
mkdir -p include/openssl/
rm -rf "/tmp/${OPENSSL_VERSION}-*"
rm -rf "/tmp/${OPENSSL_VERSION}-*.log"
rm -rf "${OPENSSL_VERSION}"
if [ ! -e ${OPENSSL_VERSION}.tar.gz ]; then
	echo "Downloading ${OPENSSL_VERSION}.tar.gz"
	curl -O https://www.openssl.org/source/${OPENSSL_VERSION}.tar.gz
else
	echo "Using ${OPENSSL_VERSION}.tar.gz"
fi
echo "Unpacking openssl"
tar xfz "${OPENSSL_VERSION}.tar.gz"
buildMac "i386"
buildMac "x86_64"
echo "Copying headers"
cp /tmp/${OPENSSL_VERSION}-i386/include/openssl/* include/openssl/
echo "Building Mac libraries"
lipo \
	"/tmp/${OPENSSL_VERSION}-i386/lib/libcrypto.a" \
	"/tmp/${OPENSSL_VERSION}-x86_64/lib/libcrypto.a" \
	-create -output lib/Mac/libcrypto.a
lipo \
	"/tmp/${OPENSSL_VERSION}-i386/lib/libssl.a" \
	"/tmp/${OPENSSL_VERSION}-x86_64/lib/libssl.a" \
	-create -output lib/Mac/libssl.a
buildIOS "armv7"
buildIOS "arm64"
buildIOS "x86_64"
buildIOS "i386"
echo "Building iOS libraries"
lipo \
	"/tmp/${OPENSSL_VERSION}-iOS-armv7/lib/libcrypto.a" \
	"/tmp/${OPENSSL_VERSION}-iOS-arm64/lib/libcrypto.a" \
	"/tmp/${OPENSSL_VERSION}-iOS-i386/lib/libcrypto.a" \
	"/tmp/${OPENSSL_VERSION}-iOS-x86_64/lib/libcrypto.a" \
	-create -output lib/iOS/libcrypto.a
lipo \
	"/tmp/${OPENSSL_VERSION}-iOS-armv7/lib/libssl.a" \
	"/tmp/${OPENSSL_VERSION}-iOS-arm64/lib/libssl.a" \
	"/tmp/${OPENSSL_VERSION}-iOS-i386/lib/libssl.a" \
	"/tmp/${OPENSSL_VERSION}-iOS-x86_64/lib/libssl.a" \
	-create -output lib/iOS/libssl.a
echo "Cleaning up"
rm -rf /tmp/${OPENSSL_VERSION}-*
rm -rf ${OPENSSL_VERSION}
echo "Done"

@pavithr Hey, sorry for this extremly late response. Seems like gist does not trigger notifications when someone comments. I think "iphoneos-cross" is define as part of OpenSSL's build setting but I'm not familiar with it 😞

I'd like to be able to make this script build the dylibs for iOS simulator instead of the static libraries. I've attempted to modify the script to use the shared parameter in ./Configure, however that doesn't seemed to have worked, unless the dylibs are put somewhere I can't find :-)

For anyone who is interested, I managed to work it out. The result of my work is here: http://delphi.radsoft.com.au/2016/03/building-openssl-dylibs-for-ios-simulator/
There's a bunch of stuff specific to Delphi, however the script could be used for any language that can use the dylibs.