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Build iOS targets with XCode 5

Thanks to armando.dicianno for the patch

Fixes issue #603

Change-Id: I91ec030e5674b82c05115ed4dfbdb8ccbff22b66

--- a/build/make/configure.sh

+++ b/build/make/configure.sh

@@ -925,41 +925,26 @@

           ;;

         darwin*)

-            if [ -z "${sdk_path}" ]; then

-                SDK_PATH=`xcode-select -print-path 2> /dev/null`

-                SDK_PATH=${SDK_PATH}/Platforms/iPhoneOS.platform/Developer

-            else

-                SDK_PATH=${sdk_path}

-            fi

-            TOOLCHAIN_PATH=${SDK_PATH}/usr/bin

-            CXX=${TOOLCHAIN_PATH}/g++

-            CC=${TOOLCHAIN_PATH}/gcc

-            AR=${TOOLCHAIN_PATH}/ar

-            LD=${TOOLCHAIN_PATH}/arm-apple-darwin10-llvm-gcc-4.2

-            AS=${TOOLCHAIN_PATH}/as

-            STRIP=${TOOLCHAIN_PATH}/strip

-            NM=${TOOLCHAIN_PATH}/nm

+

+            XCRUN_FIND="xcrun --sdk iphoneos -find"

+            CXX="$(${XCRUN_FIND} clang++)"

+            CC="$(${XCRUN_FIND} clang)"

+            AR="$(${XCRUN_FIND} ar)"

+            LD="$(${XCRUN_FIND} ld)"

+            AS="$(${XCRUN_FIND} as)"

+            STRIP="$(${XCRUN_FIND} strip)"

+            NM="$(${XCRUN_FIND} nm)"

+            RANLIB="$(${XCRUN_FIND} ranlib)"

             AS_SFX=.s

             # ASFLAGS is written here instead of using check_add_asflags

             # because we need to overwrite all of ASFLAGS and purge the

             # options that were put in above

-            ASFLAGS="-version -arch ${tgt_isa} -g"

+            ASFLAGS="-arch ${tgt_isa} -g"

-            add_cflags -arch ${tgt_isa}

-            add_ldflags -arch_only ${tgt_isa}

-

-            if [ -z "${alt_libc}" ]; then

-                alt_libc=${SDK_PATH}/SDKs/iPhoneOS6.0.sdk

-            fi

-

-            add_cflags  "-isysroot ${alt_libc}"

-

-            # Add the paths for the alternate libc

-            for d in usr/include; do

-                try_dir="${alt_libc}/${d}"

-                [ -d "${try_dir}" ] && add_cflags -I"${try_dir}"

-            done

+            alt_libc="$(xcrun --sdk iphoneos --show-sdk-path)"

+            add_cflags -arch ${tgt_isa} -isysroot ${alt_libc}

+            add_ldflags -arch ${tgt_isa} -ios_version_min 7.0

             for d in lib usr/lib usr/lib/system; do

                 try_dir="${alt_libc}/${d}"

--- a/configure

+++ b/configure

@@ -26,7 +26,7 @@

   ${toggle_unit_tests}            unit tests

   --libc=PATH                     path to alternate libc

   --as={yasm|nasm|auto}           use specified assembler [auto, yasm preferred]

-  --sdk-path=PATH                 path to root of sdk (iOS, android builds only)

+  --sdk-path=PATH                 path to root of sdk (android builds only)

   ${toggle_fast_unaligned}        don't use unaligned accesses, even when

                                   supported by hardware [auto]

   ${toggle_codec_srcs}            in/exclude codec library source code