Bug in Teensyduino v1.58 with Bolder Flight Systems Eigen library v3.0.2


New member
I just registered on this forum, and this is my first post. Thank you to the many contributors whose comments and explanations are so helpful to less experienced members.
I have a sketch that uses the Eigen library, and after updating Teensyduino to V 1.58, it is no longer compiling.
The Eigen library triggers the errors. This is illustrated by the short sketch below.
#include <eigen.h>
void setup() {}
void loop() {}
With Arduino IDE v 1.8.19 and Teensyduino 1.57, this simple sketch compiles without any error with any Teensy board.
But after updating to Teensyduino 1.58, there are countless compilation errors. The log from the Compiler is attached.
Reverting to version 1.57 fixes the problem. I have not been able to find the origin. I hope I haven't missed anything too obvious.
Thanks for your advice.


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