From 55e4a5aa1568558a04aa40f16fc022e459af53e3 Mon Sep 17 00:00:00 2001
From: Landon Fuller <landonf@bikemonkey.org>
Date: Sat, 12 Feb 2011 12:13:46 -0500
Subject: [PATCH] Add support for building a full armv6/armv7/i386 universal
 iOS library

---
 build-ios.sh | 66 +++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 60 insertions(+), 6 deletions(-)

diff --git a/build-ios.sh b/build-ios.sh
index 1035843b..3dea2422 100755
--- a/build-ios.sh
+++ b/build-ios.sh
@@ -4,10 +4,64 @@ PLATFORM_IOS=/Developer/Platforms/iPhoneOS.platform/
 PLATFORM_IOS_SIM=/Developer/Platforms/iPhoneSimulator.platform/
 SDK_IOS_VERSION="4.2"
 MIN_IOS_VERSION="3.0"
+OUTPUT_DIR="universal-ios"
 
-mkdir -p "build-ios"
-pushd "build-ios"
-export CC="${PLATFORM_IOS}"/Developer/usr/bin/gcc-4.2
-export CFLAGS="-arch armv6 -isysroot ${PLATFORM_IOS}/Developer/SDKs/iPhoneOS${SDK_IOS_VERSION}.sdk/ -miphoneos-version-min=${MIN_IOS_VERSION}"
-../configure --host=arm-apple-darwin10 && make
-popd
+build_target () {
+    local platform=$1
+    local sdk=$2
+    local arch=$3
+    local triple=$4
+    local builddir=$5
+
+    mkdir -p "${builddir}"
+    pushd "${builddir}"
+    export CC="${platform}"/Developer/usr/bin/gcc-4.2
+    export CFLAGS="-arch ${arch} -isysroot ${sdk} -miphoneos-version-min=${MIN_IOS_VERSION}"
+    ../configure --host=${triple} && make
+    popd
+}
+
+# Build all targets
+build_target "${PLATFORM_IOS}" "${PLATFORM_IOS}/Developer/SDKs/iPhoneOS${SDK_IOS_VERSION}.sdk/" armv6 arm-apple-darwin10 armv6-ios
+build_target "${PLATFORM_IOS}" "${PLATFORM_IOS}/Developer/SDKs/iPhoneOS${SDK_IOS_VERSION}.sdk/" armv7 arm-apple-darwin10 armv7-ios
+build_target "${PLATFORM_IOS_SIM}" "${PLATFORM_IOS_SIM}/Developer/SDKs/iPhoneSimulator${SDK_IOS_VERSION}.sdk/" i386 i386-apple-darwin10 i386-ios-sim
+
+# Create universal output directories
+mkdir -p "${OUTPUT_DIR}"
+mkdir -p "${OUTPUT_DIR}/include"
+mkdir -p "${OUTPUT_DIR}/include/armv6"
+mkdir -p "${OUTPUT_DIR}/include/armv7"
+mkdir -p "${OUTPUT_DIR}/include/i386"
+
+# Create the universal binary
+lipo -create armv6-ios/.libs/libffi.a armv7-ios/.libs/libffi.a i386-ios-sim/.libs/libffi.a -output "${OUTPUT_DIR}/libffi.a"
+
+# Copy in the headers
+copy_headers () {
+    local src=$1
+    local dest=$2
+
+    # Fix non-relative header reference
+    sed 's/<ffitarget.h>/"ffitarget.h"/' < "${src}/include/ffi.h" > "${dest}/ffi.h"
+    cp "${src}/include/ffitarget.h" "${dest}"
+}
+
+copy_headers armv6-ios "${OUTPUT_DIR}/include/armv6"
+copy_headers armv7-ios "${OUTPUT_DIR}/include/armv7"
+copy_headers i386-ios-sim "${OUTPUT_DIR}/include/i386"
+
+# Create top-level header
+(
+cat << EOF
+#ifdef __arm__
+  #include <arm/arch.h>
+  #ifdef _ARM_ARCH_6
+    #include "include/armv6/ffi.h"
+  #elif _ARM_ARCH_7
+    #include "include/armv7/ffi.h"
+  #endif
+#elif defined(__i386__)
+  #include "include/i386/ffi.h"
+#endif
+EOF
+) > "${OUTPUT_DIR}/ffi.h"