DTK: Should we build for arm64 architecture or arm64e?

It seems that binaries on the DTK are built for arm64e architecture, as you can see :

Code Block zsh
% lipo -info /bin/ls
Architectures in the fat file: /bin/ls are: x86_64 arm64e

However, when I try to build binaries for arm64e it doesn't seem to work. Take this sample program:

Code Block C
#include <stdio.h>
int main() {
	printf("Hello ARM\n");
	return 0;
}

Compiling it for either arm64 or arm64e works fine, but I can only run the arm64 version:

Code Block 
% clang -arch arm64 main.c && ./a.out 
Hello ARM
% clang -arch arm64e main.c && ./a.out
zsh: killed     ./a.out

I don't know why the arm64e version is killed, I couldn't find anything suspicious in the logs.

Apple's docs don't seem to mention any differences between arm64 and arm64e, but since they build things for arm64e I assume that is what we should do too?