In the past, predefined macros were generated by define.sh scripts
Now they are generated by concatenating environment variables
In this way, when executing makefile, no shell command will be executed,
it will improve the speed of executing makfile
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
It is okay for the application to be built without RTTI (-fno-rrti), but
libcxxabi requires RTTI at least for the library.
Signed-off-by: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>