“888272b54742c4ab70eb4152f357c9658fde92f9”上不存在“test/collective/fleet/parallel_dygraph_transformer.py”
* Add documentation of cross-compiling for iOS. * Correst the typo in documentation of cross-compiling for raspberry pi. * Set ANDROID_API to 21 when it is specified < 21 for arm64-v8a in build_android.sh. * Check the input and print the usage in MergeModel.cpp.