Using configure scripts to make libraries for iOS

While building a wxWidgets app for iOS, I wanted to build wxWidgets as a library, not include it as part of the application as the minimal iOS example does. The following script (based on ios-autotools) sets up the required environment and then calls the supplied configure script.

The main changes are:
1. the configure script is passed as a parameter so that it does not need to be in the same directory as the iconfigure script which keeps the source folder unchanged
2. if an SDK version is passed in and the SDK for that version of the SDK does not exist then the default SDK is used with the ios-min-version set to the specified version.

#!/bin/sh set -e usage () { echo "Usage: [VARIABLE...] $(basename $0) architecture path" echo "" echo " architecture Target architecture. [armv7|armv7s|arm64|i386|x86_64]" echo " path path to configure script to run" echo "" echo " VARIABLEs are:" echo " SDKVERSION Target a specific SDK version." echo " PREFIX Custom install prefix, useful for local installs." echo " CHOST Configure host, set if not deducable by ARCH." echo " SDK SDK target, set if not deducable by ARCH. [iphoneos|iphonesimulator]" echo "" echo " CFLAGS CPPFLAGS CXXFLAGS LDFLAGS PKG_CONFIG_PATH" echo "" echo " All additional parameters are passed to the configure script." exit 1 } # Sanity checks if [ "$#" -lt 2 ]; then echo "Please supply an architecture name and configure file" usage fi # Build architecture export ARCH=$1 # Configure script CONFIG=$2 # Export supplied CHOST or deduce by ARCH if [ ! -z "$CHOST" ]; then export CHOST else case $ARCH in armv7 | armv7s ) export CHOST=arm-apple-darwin ;; arm64 ) export CHOST=aarch64-apple-darwin ;; i386 | x86_64 ) export CHOST=$ARCH-apple-darwin ;; * ) usage ;; esac fi # Export supplied SDK or deduce by ARCH if [ ! -z "$SDK" ]; then export SDK echo Using supplied SDK of "$SDK" else case $ARCH in armv7 | armv7s | arm64 ) export SDK=iphoneos ;; i386 | x86_64 ) export SDK=iphonesimulator ;; * ) usage ;; esac fi # Export supplied SDKVERSION or use system default if [ ! -z "$SDKVERSION" ]; then SDKNAME=$(basename $(xcrun --sdk $SDK --show-sdk-platform-path) .platform) export SDKVERSION export SDKROOT=$(xcrun --sdk $SDK --show-sdk-platform-path)"/Developer/SDKs/$SDKNAME.$SDKVERSION.sdk" # If the SDK for the supplied version doesn't exist, use the current one if [ ! -d "$SDKROOT" ]; then export SDKROOT=$(xcrun --sdk $SDK --show-sdk-path) # current version fi else export SDKVERSION=$(xcrun --sdk $SDK --show-sdk-version) # current version export SDKROOT=$(xcrun --sdk $SDK --show-sdk-path) # current version fi # Export supplied SDKVERSION or use system default if [ ! -z "$SDKVERSION" ]; then SDKNAME=$(basename $(xcrun --sdk $SDK --show-sdk-platform-path) .platform) export SDKVERSION export SDKROOT=$(xcrun --sdk $SDK --show-sdk-platform-path)"/Developer/SDKs/$SDKNAME.$SDKVERSION.sdk" # If the SDK for the supplied version doesn't exist, use the current one if [ ! -d "$SDKROOT" ]; then export SDKROOT=$(xcrun --sdk $SDK --show-sdk-path) # current version fi else export SDKVERSION=$(xcrun --sdk $SDK --show-sdk-version) # current version export SDKROOT=$(xcrun --sdk $SDK --show-sdk-path) # current version fi # Export supplied PREFIX or use default if [ ! -z "$PREFIX" ]; then export PREFIX else export PREFIX="/opt/$SDK-$SDKVERSION/$ARCH" fi # Binaries export CC=$(xcrun --sdk $SDK --find gcc) export CPP=$(xcrun --sdk $SDK --find gcc)" -E" export CXX=$(xcrun --sdk $SDK --find g++) export LD=$(xcrun --sdk $SDK --find ld) # Flags export CFLAGS="$CFLAGS -arch $ARCH -isysroot $SDKROOT -I$PREFIX/include -mios-version-min=$SDKVERSION" export CPPFLAGS="$CPPFLAGS -arch $ARCH -isysroot $SDKROOT -I$PREFIX/include -mios-version-min=$SDKVERSION" export CXXFLAGS="$CXXFLAGS -arch $ARCH -isysroot $SDKROOT -I$PREFIX/include" export LDFLAGS="$LDFLAGS -arch $ARCH -isysroot $SDKROOT -L$PREFIX/lib" export PKG_CONFIG_PATH="$PKG_CONFIG_PATH":"$SDKROOT/usr/lib/pkgconfig":"$PREFIX/lib/pkgconfig" echo CFLAGS="$CFLAGS" # Remove script parameters shift 2 # Run configure $CONFIG \ --prefix="$PREFIX" \ --host="$CHOST" \ $@