hello!
I was using Cygwin 32bit.
I recently had a problem with my PC and I'm trying to reinstall Cygwin 32bit.
"cygwin is not supported on 32-bit windows"
Couldn't install with message.
 
So, I installed Cygwin 64bit and built my project.
However, an error occurred at line 102 of the usr/include/cygwin/signal.h file.
It looks like the problem is that __x86_64__ is not defined, how can I fix it?
 
Answers I'll wait.