diff --git a/build/make/configure.sh b/build/make/configure.sh
index 0426f92..24fa04e 100755
--- a/build/make/configure.sh
+++ b/build/make/configure.sh
@@ -624,6 +624,9 @@ process_common_toolchain() {
     if [ -d "/Developer/SDKs/MacOSX10.7.sdk" ]; then
         osx_sdk_dir="/Developer/SDKs/MacOSX10.7.sdk"
     fi
+    if test -n "$SYSROOT_PATH" ; then
+        osx_sdk_dir=$SYSROOT_PATH
+    fi
 
     case ${toolchain} in
         *-darwin8-*)
@@ -743,6 +746,14 @@ process_common_toolchain() {
         darwin*)
             SDK_PATH=/Developer/Platforms/iPhoneOS.platform/Developer
             TOOLCHAIN_PATH=${SDK_PATH}/usr/bin
+            if test -n "$SYSROOT_PATH" ; then
+               SDK_FULL_PATH=$SYSROOT_PATH
+            else
+               SDK_FULL_PATH="${SDK_PATH}/SDKs/iPhoneOS5.0.sdk"
+            fi
+            if test -n "$SDK_BIN_PATH" ; then
+                TOOLCHAIN_PATH=$SDK_BIN_PATH
+            fi
             CC=${TOOLCHAIN_PATH}/gcc
             AR=${TOOLCHAIN_PATH}/ar
             LD=${TOOLCHAIN_PATH}/arm-apple-darwin10-llvm-gcc-4.2
@@ -759,10 +770,10 @@ process_common_toolchain() {
             add_cflags -arch ${tgt_isa}
             add_ldflags -arch_only ${tgt_isa}
 
-            add_cflags  "-isysroot ${SDK_PATH}/SDKs/iPhoneOS5.0.sdk"
+            add_cflags  "-isysroot $SDK_FULL_PATH"
 
             # This should be overridable
-            alt_libc=${SDK_PATH}/SDKs/iPhoneOS5.0.sdk
+            alt_libc=$SDK_FULL_PATH
 
             # Add the paths for the alternate libc
             for d in usr/include; do