LilyGo_TLora_V2_1_1_6 observer builds failed to link:
undefined reference to `WebConfigServer::MAX_BATCH'
in handleStatus and handleCliPost
An in-class initialiser is only a declaration under C++11, which is what the
xtensa-esp32 toolchain builds with. Every previous use of MAX_BATCH was a
comparison, which reads the value and needs no symbol. Reporting it as
status.max_cmds, and naming it in the "too many commands" error, passes it to
ArduinoJson — which takes `const T&` — and binding a reference odr-uses it.
It linked on most targets because the compiler folded the reference away, and
failed on the ones where it did not. A cast at the two call sites would have
silenced it just as narrowly; defining the symbols is what stops the next use
from depending on the same luck. MAX_BODY and STOP_WARN_MS get the same
treatment for the same reason, before they are the next to be passed by
reference.
agessaman
a672cdb154