Catalina's root is read-only, pick a new SDK path

build.sh

@@ -873,16 +873,16 @@ case $TARGET in
         build_linux || failure
         ;;
     $TARGET_MAC)
-        if [ -d /Developer/SDKs/MacOSX10.8.sdk ]; then
+        if [ -d /Users/Shared/Developer/SDKs/MacOSX10.8.sdk ]; then
             echo "Preparing Mac OS X 10.8 SDK build environment..." | tee -a $LOGFILE
-            export LDFLAGS="-isysroot /Developer/SDKs/MacOSX10.8.sdk -Wl,-syslibroot,/Developer/SDKs/MacOSX10.8.sdk -arch x86_64 $LDFLAGS"
-            export CPPFLAGS="-isysroot /Developer/SDKs/MacOSX10.8.sdk -arch x86_64 $CPPFLAGS"
-            export CFLAGS="-isysroot /Developer/SDKs/MacOSX10.8.sdk -arch x86_64 $CFLAGS"
-            export CXXFLAGS="-isysroot /Developer/SDKs/MacOSX10.8.sdk -arch x86_64 $CXXFLAGS"
-            export SDKROOT="/Developer/SDKs/MacOSX10.8.sdk"
+            export LDFLAGS="-isysroot /Users/Shared/Developer/SDKs/MacOSX10.8.sdk -Wl,-syslibroot,/Users/Shared/Developer/SDKs/MacOSX10.8.sdk -arch x86_64 $LDFLAGS"
+            export CPPFLAGS="-isysroot /Users/Shared/Developer/SDKs/MacOSX10.8.sdk -arch x86_64 $CPPFLAGS"
+            export CFLAGS="-isysroot /Users/Shared/Developer/SDKs/MacOSX10.8.sdk -arch x86_64 $CFLAGS"
+            export CXXFLAGS="-isysroot /Users/Shared/Developer/SDKs/MacOSX10.8.sdk -arch x86_64 $CXXFLAGS"
+            export SDKROOT="/Users/Shared/Developer/SDKs/MacOSX10.8.sdk"
             export MACOSX_DEPLOYMENT_TARGET=10.8
         else
-            echo "Mac OS X 10.8 SDK required but missing!" | tee -a $LOGFILE
+            echo "Mac OS X 10.8 SDK required but missing (in /Users/Shared/Developer/SDKs)!" | tee -a $LOGFILE
             failure
         fi
         check_prerequisites || failure