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Annotation of embedaddon/ntp/m4/define_dir.m4, revision 1.1

1.1     ! misho       1: dnl @synopsis AC_DEFINE_DIR(VARNAME, DIR [, DESCRIPTION])
        !             2: dnl
        !             3: dnl This macro defines (with AC_DEFINE) VARNAME to the expansion of the DIR
        !             4: dnl variable, taking care of fixing up ${prefix} and such.
        !             5: dnl
        !             6: dnl Note that the 3 argument form is only supported with autoconf 2.13 and
        !             7: dnl later (i.e. only where AC_DEFINE supports 3 arguments).
        !             8: dnl
        !             9: dnl Examples:
        !            10: dnl
        !            11: dnl    AC_DEFINE_DIR(DATADIR, datadir)
        !            12: dnl    AC_DEFINE_DIR(PROG_PATH, bindir, [Location of installed binaries])
        !            13: dnl
        !            14: dnl @version $Id: acinclude.m4,v 1.3 2000/08/04 03:26:22 stenn Exp $
        !            15: dnl @author Alexandre Oliva <oliva@lsd.ic.unicamp.br>
        !            16: 
        !            17: AC_DEFUN([AC_DEFINE_DIR], [
        !            18:        ac_expanded=`(
        !            19:            test "x$prefix" = xNONE && prefix="$ac_default_prefix"
        !            20:            test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
        !            21:            eval echo \""[$]$2"\"
        !            22:        )`
        !            23:        ifelse([$3], [],
        !            24:          AC_DEFINE_UNQUOTED([$1], ["$ac_expanded"]),
        !            25:          AC_DEFINE_UNQUOTED([$1], ["$ac_expanded"], [$3]))
        !            26: ])