dnl $Id: check-newlib.m4,v 1.2 2001-09-27 11:59:11 chris Exp $
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dnl $Id: check-newlib.m4,v 1.2 2001-09-27 11:59:11 chris Exp $
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AC_DEFUN(RTEMS_CHECK_NEWLIB,
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AC_DEFUN(RTEMS_CHECK_NEWLIB,
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[dnl
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[dnl
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AC_REQUIRE([RTEMS_PROG_CC_FOR_TARGET])dnl
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AC_REQUIRE([RTEMS_PROG_CC_FOR_TARGET])dnl
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AC_REQUIRE([RTEMS_CANONICALIZE_TOOLS])dnl
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AC_REQUIRE([RTEMS_CANONICALIZE_TOOLS])dnl
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AC_CACHE_CHECK([for newlib],
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AC_CACHE_CHECK([for newlib],
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rtems_cv_use_newlib,
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rtems_cv_use_newlib,
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[
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[
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rtems_save_CC=$CC
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rtems_save_CC=$CC
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CC=$CC_FOR_TARGET
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CC=$CC_FOR_TARGET
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dnl some versions of newlib provide not_required_by_rtems
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dnl some versions of newlib provide not_required_by_rtems
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AC_TRY_LINK(
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AC_TRY_LINK(
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[extern int not_required_by_rtems() ;],
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[extern int not_required_by_rtems() ;],
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[not_required_by_rtems()],
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[not_required_by_rtems()],
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rtems_cv_use_newlib="yes")
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rtems_cv_use_newlib="yes")
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dnl older versions of newlib provided rtems_provides_crt0
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dnl older versions of newlib provided rtems_provides_crt0
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if test -z "$rtems_cv_use_newlib"; then
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if test -z "$rtems_cv_use_newlib"; then
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AC_TRY_LINK(
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AC_TRY_LINK(
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[extern int rtems_provides_crt0 ;],
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[extern int rtems_provides_crt0 ;],
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[rtems_provides_crt0 = 0],
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[rtems_provides_crt0 = 0],
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rtems_cv_use_newlib="yes",
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rtems_cv_use_newlib="yes",
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rtems_cv_use_newlib="no")
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rtems_cv_use_newlib="no")
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fi
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fi
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CC=$rtems_save_CC])
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CC=$rtems_save_CC])
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RTEMS_USE_NEWLIB="$rtems_cv_use_newlib"
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RTEMS_USE_NEWLIB="$rtems_cv_use_newlib"
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AC_SUBST(RTEMS_USE_NEWLIB)
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AC_SUBST(RTEMS_USE_NEWLIB)
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])
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])
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