Subversion Repositories openrisc

dnl $Id: check-newlib.m4,v 1.2 2001-09-27 11:59:11 chris 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 newlib],

  rtems_cv_use_newlib,

  [

    rtems_save_CC=$CC

    CC=$CC_FOR_TARGET

dnl some versions of newlib provide not_required_by_rtems

    AC_TRY_LINK(

      [extern int not_required_by_rtems() ;],

      [not_required_by_rtems()],

      rtems_cv_use_newlib="yes")

dnl older versions of newlib provided rtems_provides_crt0

    if test -z "$rtems_cv_use_newlib"; then

      AC_TRY_LINK(

        [extern int rtems_provides_crt0 ;],

        [rtems_provides_crt0 = 0],

        rtems_cv_use_newlib="yes",

        rtems_cv_use_newlib="no")

    fi

  CC=$rtems_save_CC])

RTEMS_USE_NEWLIB="$rtems_cv_use_newlib"

AC_SUBST(RTEMS_USE_NEWLIB)

])