dnl
dnl Configuration for trio
dnl

AC_INIT
AC_CONFIG_SRCDIR([triodef.h])
AC_PREREQ(2.55) dnl autoconf 2.55 was released in 2002

AC_PROG_CC
ifdef([AC_PROG_CC_STDC], [AC_PROG_CC_STDC])
AC_LANG([C])

AC_PROG_INSTALL
AC_PROG_RANLIB

dnl
dnl Alpha floating-point compiler option.
dnl

AC_MSG_CHECKING(for IEEE compilation options)
AC_CACHE_VAL(ac_cv_ieee_option, [
  AC_COMPILE_IFELSE(AC_LANG_PROGRAM(,[[[
    #if !(defined(__alpha) && (defined(__DECC) || defined(__DECCXX) || (defined(__osf__) && defined(__LANGUAGE_C__))) && (defined(VMS) || defined(__VMS)))
    # error "Option needed"
    typedef int option_needed[-1];
    #endif
    ]]]),
    ac_cv_ieee_option="/IEEE_MODE=UNDERFLOW_TO_ZERO/FLOAT=IEEE",
    AC_COMPILE_IFELSE(AC_LANG_PROGRAM(,[[[
      #if !(defined(__alpha) && (defined(__DECC) || defined(__DECCXX) || (defined(__osf__) && defined(__LANGUAGE_C__) && !defined(__GNUC__))) && !(defined(VMS) || defined(__VMS)) && !defined(_CFE))
      # error "Option needed"
      typedef int option_needed[-1];
      #endif
      ]]]),
      ac_cv_ieee_option="-ieee",
      AC_COMPILE_IFELSE(AC_LANG_PROGRAM(,[[[
	#if !(defined(__alpha) && (defined(__GNUC__) && (defined(__osf__) || defined(__linux__))))
	# error "Option needed"
	typedef int option_needed[-1];
	#endif
	]]]),
	ac_cv_ieee_option="-mieee",
	ac_cv_ieee_option="none"
      )
    )
  )
])
AC_MSG_RESULT($ac_cv_ieee_option)
if test $ac_cv_ieee_option != none; then
  CFLAGS="${CFLAGS} ${ac_cv_ieee_option}"
fi

AC_CONFIG_FILES([Makefile])
AC_OUTPUT