--- configure
+++ configure
@@ -15866,12 +15842,31 @@
         $as_echo "#define PA_USE_COREAUDIO 1" >>confdefs.h
 
 
-        CFLAGS="$CFLAGS -I\$(top_srcdir)/src/os/unix -Wno-deprecated"
+        CFLAGS="$CFLAGS -I\$(top_srcdir)/src/os/unix -Wno-deprecated -DNDEBUG"
         LIBS="-framework CoreAudio -framework AudioToolbox -framework AudioUnit -framework CoreFoundation -framework CoreServices"
 
         if test "x$enable_mac_universal" = "xyes" ; then
-           mac_version_min="-mmacosx-version-min=10.6"
-           mac_sysroot="-isysroot $(xcrun --sdk macosx --show-sdk-path)"
+           case `xcodebuild -version | sed -n 's/Xcode \(.*\)/\1/p'` in
+
+           3.0|3.1)
+              if [ -d /Developer/SDKs/MacOSX10.5.sdk ] ; then
+                 mac_version_min="-mmacosx-version-min=10.5"
+                 mac_sysroot="-isysroot /Developer/SDKs/MacOSX10.5.sdk"
+              else
+                 mac_version_min="-mmacosx-version-min=10.4"
+                 mac_sysroot="-isysroot /Developer/SDKs/MacOSX10.4u.sdk"
+              fi
+              ;;
+
+           *)
+              if xcrun --sdk macosx10.5 --show-sdk-path >/dev/null 2>&1 ; then
+                 mac_version_min="-mmacosx-version-min=10.5"
+                 mac_sysroot="-isysroot $(xcrun --sdk macosx10.5 --show-sdk-path)"
+              else
+                 mac_version_min="-mmacosx-version-min=10.6"
+                 mac_sysroot="-isysroot $(xcrun --sdk macosx --show-sdk-path)"
+              fi
+           esac
 
                                  mac_arches=""
            for arch in x86_64 arm64