Caused incorrect exception behavior and failures in basic.exe, exceptions.exe regression test on x64 windows. This was due to the fact that some source files didn't include signal.h while others did. In case where signal.h was not included incompatible defines were used for SIGILL and SIGFPE in mini-amd64.h.
/* Have signal */
#define HAVE_SIGNAL 1
+ /* Define to 1 if you have the <signal.h> header file. */
+#define HAVE_SIGNAL_H 1
+
/* Have signbit */
/* #undef HAVE_SIGNBIT */