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dnl check-newlib.m4,v 1.7 2002/01/06 20:12:13 joel Exp

AC_DEFUN(RTEMS_CHECK_NEWLIB,

[dnl

AC_REQUIRE([RTEMS_PROG_CC_FOR_TARGET])dnl

AC_REQUIRE([RTEMS_CANONICALIZE_TOOLS])dnl

AC_CACHE_CHECK([for RTEMS newlib],

  rtems_cv_use_newlib,

  [

dnl some versions of newlib provide not_required_by_rtems

    AC_TRY_LINK(

      [extern void not_required_by_rtems() ;],

      [not_required_by_rtems()],

      rtems_cv_use_newlib="yes")

dnl some versions of newlib provide rtems_provides_crt0()

    AS_IF([test -z "$rtems_cv_use_newlib"],

      [AC_TRY_LINK(

        [extern void rtems_provides_crt0() ;],

        [rtems_provides_crt0()],

        rtems_cv_use_newlib="yes",

        rtems_cv_use_newlib="no")]

    )

  ])

  RTEMS_USE_NEWLIB="$rtems_cv_use_newlib"

  AC_SUBST(RTEMS_USE_NEWLIB)

  AS_IF([test x"${RTEMS_USE_NEWLIB}" = x"yes"],

    [ AC_DEFINE_UNQUOTED(RTEMS_NEWLIB,1,[if using newlib])]

  )

])