[dnl Do we have posix signals, reliable bsd signals or unreliable sysv signals ?
AC_CACHE_CHECK([for posix signals], unet_cv_sys_signal_posix,
[AC_TRY_COMPILE([#include <signal.h>],
[dnl Do we have posix signals, reliable bsd signals or unreliable sysv signals ?
AC_CACHE_CHECK([for posix signals], unet_cv_sys_signal_posix,
[AC_TRY_COMPILE([#include <signal.h>],