How to use “MP_QSTR_y”？

[Mars-CN]

I encountered a problem when using C to extend MicroPython. There is a class with a member function called 'y', but I encountered an error when adding members to this class.

/home/mars/esp/micropython/ports/facemoo/build/frozen_content.c:317:5: error: redeclaration of enumerator 'MP_QSTR_y'
MP_QSTR_y,
^~~~~~~~~
In file included from /home/mars/esp/micropython/py/obj.h:33,
from /home/mars/esp/micropython/py/objint.h:30,
from /home/mars/esp/micropython/ports/facemoo/build/frozen_content.c:16:
/home/mars/esp/micropython/ports/facemoo/build/genhdr/qstrdefs.generated.h:1002:6: note: previous definition of 'MP_QSTR_y' was here
QDEF(MP_QSTR_y, 46556, 1, "y")
^~~~~~~~~
/home/mars/esp/micropython/py/qstr.h:41:34: note: in definition of macro 'QDEF'
#define QDEF(id, hash, len, str) id,

Where is the problem?

[robert-hh]

Try to remove all previous build files (rm -r build*) and restart the build. You can also use make BOARD=xxx clean, but that would also remove the build of the IDF files and then a new build takes longer.

[jimmo]

Yep a make clean will solve this.

The build can handle the set of known qstrs changing and rebuilds as necessary, except in the case where a qstr that was previously only in the frozen set is now also in the base set.