Autotools sets up its config.h file with the '#define XXX 0' or '#define XXX 1' pattern. This check-in makes the sources Autotools aware. We need to verify CMake does the same
SIMON-64 and SIMON-128 have different ISA requirements. The same applies to SPECK-64 and SPECK-128. GCC generated code that resulted in a SIGILL due to the ISA differences on a down level machine. The instructions was a mtfprwz from POWER8. It was prsent in a function prologue on a POWER7 machine.